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Apache Axis

product · product:apache-axis

Coverage
1
first 2026-11-10 → last 2026-11-14
Latest activity
2026-11-14
N-central: 4EverAble2Shell exploited on 21+ servers, Agent2Shell adds SYSTEM on agents; disable Legacy API
Peak priority
high
1 high
Targets
technology
sectors: technology
Sources cited
13
11 hosts

Action items (1)

Do-now tasks recorded on the entries about Apache Axis, newest first. Check the date before acting on an older one.

  • Confirm on every on-premises N-central server, yours or your IT provider's, that the Legacy API is disabled and not reachable from the internet, and keep Hotfix 2 (build 2026.4.1.26) and the Agent and Probe upgrades in place; on any server that had the Legacy API on, check the web logs for POST requests to the Axis endpoint /dms/services/ServerUI carrying a SOAP fault and the host for a symlink at the N-central flag file path, and treat a hit as a full compromise, because Hotfix 2 does not fix the chain and 19 of the 21 compromised servers Huntback found already ran it.
    2026-11-10CVE-2026-125883 +7

Defender insights

What each entry about Apache Axis tells a defender to do, newest first.

2026-11-10HIGHexploitedN-central: 4EverAble2Shell exploited on 21+ servers, Agent2Shell adds SYSTEM on agents; disable Legacy API

Exposure · detection

Story timeline

  1. 2026-11-10N-able N-central: a researcher published exploits for 33 alleged flaws and N-able shipped 2026.4 Hotfix 2 (build 2026.4.1.26) with seven CVE ids, but a second disclosure adds 4EverAble2Shell, a chain through Apache Axis (CVE-2026-90436) and a root escalation that works against Hotfix 2 when the Legacy API is on and is exploited on at least 21 production servers, and Agent2Shell, SYSTEM commands on managed Windows agents, with no fix yet for either
    trending-vulnerabilitiesN-central: 4EverAble2Shell exploited on 21+ servers, Agent2Shell adds SYSTEM on agents; disable Legacy API
ATT&CK techniques (12 across 9 tactics)

12 techniques observed across 1 entry about this entity, derived from entry metadata and body evidence, never asserted without a published entry behind it · pinned to MITRE ATT&CK v20.1 · compare on the matrix · Navigator layer (JSON)

  • Initial AccessExploit Public-Facing Application
  • ExecutionScheduled Task/Job: Cron · Command and Scripting Interpreter · Software Deployment Tools
  • PersistenceScheduled Task/Job: Cron · Create Account · Create or Modify System Process: Systemd Service
  • Privilege EscalationScheduled Task/Job: Cron · Exploitation for Privilege Escalation · Create or Modify System Process: Systemd Service
  • StealthIndicator Removal · Indicator Removal: File Deletion
  • Credential AccessUnsecured Credentials
  • Lateral MovementSoftware Deployment Tools
  • Command and ControlIngress Tool Transfer
  • ImpactResource Hijacking: Compute Hijacking

Initial Access TA0001

T1190Exploit Public-Facing Application×1

Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network. The weakness in the system can be a software bug, a temporary glitch, or a misconfiguration.

Evidence: 2026-11-10/n-able-n-central-33-unpatched-flaws-public-pocs-offline · ATT&CK page ↗

Execution TA0002

T1053.003Scheduled Task/Job: Cron×1

Adversaries may abuse the <code>cron</code> utility to perform task scheduling for initial or recurring execution of malicious code. The <code>cron</code> utility is a time-based job scheduler for Unix-like operating systems. The <code> crontab</code> file contains the schedule of cron entries to be run and the specified times for execution. Any <code>crontab</code> files are stored in operating system-specific file paths.

Evidence: 2026-11-10/n-able-n-central-33-unpatched-flaws-public-pocs-offline · ATT&CK page ↗

T1059Command and Scripting Interpreter×1

Adversaries may abuse command and script interpreters to execute commands, scripts, or binaries. These interfaces and languages provide ways of interacting with computer systems and are a common feature across many different platforms. Most systems come with some built-in command-line interface and scripting capabilities, for example, macOS and Linux distributions include some flavor of Unix Shell while Windows installations include the Windows Command Shell and PowerShell.

Evidence: 2026-11-10/n-able-n-central-33-unpatched-flaws-public-pocs-offline · ATT&CK page ↗

T1072Software Deployment Tools×1

Adversaries may gain access to and use centralized software suites installed within an enterprise to execute commands and move laterally through the network. Configuration management and software deployment applications may be used in an enterprise network or cloud environment for routine administration purposes. These systems may also be integrated into CI/CD pipelines. Examples of such solutions include: SCCM, HBSS, Altiris, AWS Systems Manager, Microsoft Intune, Azure Arc, and GCP Deployment Manager.

Evidence: 2026-11-10/n-able-n-central-33-unpatched-flaws-public-pocs-offline · ATT&CK page ↗

Persistence TA0003

T1053.003Scheduled Task/Job: Cron×1

Adversaries may abuse the <code>cron</code> utility to perform task scheduling for initial or recurring execution of malicious code. The <code>cron</code> utility is a time-based job scheduler for Unix-like operating systems. The <code> crontab</code> file contains the schedule of cron entries to be run and the specified times for execution. Any <code>crontab</code> files are stored in operating system-specific file paths.

Evidence: 2026-11-10/n-able-n-central-33-unpatched-flaws-public-pocs-offline · ATT&CK page ↗

T1136Create Account×1

Adversaries may create an account to maintain access to victim systems. With a sufficient level of access, creating such accounts may be used to establish secondary credentialed access that does not require persistent remote access tools to be deployed on the system.

Evidence: 2026-11-10/n-able-n-central-33-unpatched-flaws-public-pocs-offline · ATT&CK page ↗

T1543.002Create or Modify System Process: Systemd Service×1

Adversaries may create or modify systemd services to repeatedly execute malicious payloads as part of persistence. Systemd is a system and service manager commonly used for managing background daemon processes (also known as services) and other system resources. Systemd is the default initialization (init) system on many Linux distributions replacing legacy init systems, including SysVinit and Upstart, while remaining backwards compatible.

Evidence: 2026-11-10/n-able-n-central-33-unpatched-flaws-public-pocs-offline · ATT&CK page ↗

Privilege Escalation TA0004

T1053.003Scheduled Task/Job: Cron×1

Adversaries may abuse the <code>cron</code> utility to perform task scheduling for initial or recurring execution of malicious code. The <code>cron</code> utility is a time-based job scheduler for Unix-like operating systems. The <code> crontab</code> file contains the schedule of cron entries to be run and the specified times for execution. Any <code>crontab</code> files are stored in operating system-specific file paths.

Evidence: 2026-11-10/n-able-n-central-33-unpatched-flaws-public-pocs-offline · ATT&CK page ↗

T1068Exploitation for Privilege Escalation×1

Adversaries may exploit software vulnerabilities in an attempt to elevate privileges. Exploitation of a software vulnerability occurs when an adversary takes advantage of a programming error in a program, service, or within the operating system software or kernel itself to execute adversary-controlled code. Security constructs such as permission levels will often hinder access to information and use of certain techniques, so adversaries will likely need to perform privilege escalation to include use of software exploitation to circumvent those restrictions.

Evidence: 2026-11-10/n-able-n-central-33-unpatched-flaws-public-pocs-offline · ATT&CK page ↗

T1543.002Create or Modify System Process: Systemd Service×1

Adversaries may create or modify systemd services to repeatedly execute malicious payloads as part of persistence. Systemd is a system and service manager commonly used for managing background daemon processes (also known as services) and other system resources. Systemd is the default initialization (init) system on many Linux distributions replacing legacy init systems, including SysVinit and Upstart, while remaining backwards compatible.

Evidence: 2026-11-10/n-able-n-central-33-unpatched-flaws-public-pocs-offline · ATT&CK page ↗

Stealth TA0005

T1070Indicator Removal×1

Adversaries may selectively delete or modify artifacts generated to reduce indications of their presence and blend in with legitimate activity. Rather than broadly removing evidence, adversaries may target specific artifacts that appear anomalous or are likely to draw scrutiny, while leaving sufficient data intact to maintain the appearance of normal system behavior.

Evidence: 2026-11-10/n-able-n-central-33-unpatched-flaws-public-pocs-offline · ATT&CK page ↗

T1070.004Indicator Removal: File Deletion×1

Adversaries may delete files left behind by the actions of their intrusion activity. Malware, tools, or other non-native files dropped or created on a system by an adversary (ex: Ingress Tool Transfer) may leave traces to indicate to what was done within a network and how. Removal of these files can occur during an intrusion, or as part of a post-intrusion process to minimize the adversary's footprint.

Evidence: 2026-11-10/n-able-n-central-33-unpatched-flaws-public-pocs-offline · ATT&CK page ↗

Credential Access TA0006

T1552Unsecured Credentials×1

Adversaries may search compromised systems to find and obtain insecurely stored credentials. These credentials can be stored and/or misplaced in many locations on a system, including plaintext files (e.g. Shell History), operating system or application-specific repositories (e.g. Credentials in Registry), or other specialized files/artifacts (e.g. Private Keys).

Evidence: 2026-11-10/n-able-n-central-33-unpatched-flaws-public-pocs-offline · ATT&CK page ↗

Lateral Movement TA0008

T1072Software Deployment Tools×1

Adversaries may gain access to and use centralized software suites installed within an enterprise to execute commands and move laterally through the network. Configuration management and software deployment applications may be used in an enterprise network or cloud environment for routine administration purposes. These systems may also be integrated into CI/CD pipelines. Examples of such solutions include: SCCM, HBSS, Altiris, AWS Systems Manager, Microsoft Intune, Azure Arc, and GCP Deployment Manager.

Evidence: 2026-11-10/n-able-n-central-33-unpatched-flaws-public-pocs-offline · ATT&CK page ↗

Command and Control TA0011

T1105Ingress Tool Transfer×1

Adversaries may transfer tools or other files from an external system into a compromised environment. Tools or files may be copied from an external adversary-controlled system to the victim network through the command and control channel or through alternate protocols such as ftp. Once present, adversaries may also transfer/spread tools between victim devices within a compromised environment (i.e. Lateral Tool Transfer).

Evidence: 2026-11-10/n-able-n-central-33-unpatched-flaws-public-pocs-offline · ATT&CK page ↗

Impact TA0040

T1496.001Resource Hijacking: Compute Hijacking×1

Adversaries may leverage the compute resources of co-opted systems to complete resource-intensive tasks, which may impact system and/or hosted service availability.

Evidence: 2026-11-10/n-able-n-central-33-unpatched-flaws-public-pocs-offline · ATT&CK page ↗

Entries about Apache Axis (1)

2026-11-10 · view entry permalink →

HIGHCVE-2026-125883 +7exploitedupdatedNATOB2

N-able N-central: a researcher published exploits for 33 alleged flaws and N-able shipped 2026.4 Hotfix 2 (build 2026.4.1.26) with seven CVE ids, but a second disclosure adds 4EverAble2Shell, a chain through Apache Axis (CVE-2026-90436) and a root escalation that works against Hotfix 2 when the Legacy API is on and is exploited on at least 21 production servers, and Agent2Shell, SYSTEM commands on managed Windows agents, with no fix yet for either

An independent researcher published what Huntress counts as 33 critical flaws in the N-central appliance, chaining into four exploits, and N-able took its hosted environments offline on 2026-11-09 (Huntress, 2026-11-09); the chain BleepingComputer calls most critical abuses an unauthenticated XML external entity flaw to steal a trusted local session and run commands as the service user (BleepingComputer, 2026-11-09).

On 2026-11-10 N-able released N-central 2026.4 Hotfix 2, build 2026.4.1.26, "a critical security update", for which Huntress lists seven CVE ids (N-able, 2026-11-10; Huntress, 2026-11-10; N-able CNA record, 2026-11-10; N-able CNA record, 2026-11-10). N-able reported scanning for that set but no successful exploitation (Huntress, 2026-11-10), and none of the seven is in CISA's catalog (Tenable, 2026-11-12).

On 2026-11-12 the researcher published a second set. 4EverAble2Shell is unauthenticated command execution as root that requires the Legacy API to be enabled, per BleepingComputer; it chains CVE-2026-90436, an Apache Axis 1.x deserialization flaw for which Apache does not expect a fix, with a root escalation in N-central's maintenance helper (BleepingComputer, 2026-11-12; Apache Axis project, 2026-11-06; Huntback, 2026-11-12). Huntback counts at least 21 servers, 19 of them on Hotfix 2, in North America, South Africa and Europe but not Switzerland, and Previdian's honeypot recorded attempts at the chain (Huntback, 2026-11-12; Previdian, 2026-11-12). Agent2Shell is a set of more than ten issues in how the server talks to Windows Agents and Probes, two chains of which let an unauthenticated attacker who can reach the server run commands as SYSTEM on managed endpoints; N-able confirmed it also requires the non-default Legacy API (The Hacker News, 2026-11-12; Huntress, 2026-11-13). N-able has published indicators of compromise for customers that have not disabled the Legacy API, has no fix for the new claims and plans a follow-up hotfix (Huntress, 2026-11-13; Tenable, 2026-11-12).

N-able said it has not seen active exploitation of the vulnerabilities as of November 9 at 15:15:00 UTC.

Huntress 2026-11-09

One of the most critical exploit chains abuses an unauthenticated XXE vulnerability in N-central's service-import functionality to steal a trusted local session, reset an account password, and execute commands on the server as the nable user.

BleepingComputer 2026-11-09

Several of the published PoCs describe unauthenticated attack paths, so if they work as described, network reachability is a prerequisite for exploitation.

Field Effect 2026-11-09

As of November 9, 2026, N-able has published no mechanism detail, affected versions, or fixed versions.

Censys 2026-11-09

N-central 2026.4 Hotfix 2 is a critical security update.

All customers, both hosted and on-premises, must upgrade their Agents and Probes.

N-able

scanning activity associated with the published proof-of-concept code

Huntress 2026-11-09

Servers running 2026.4 HF2 with Legacy API disabled are not exposed to this exploit chain.

Huntress (updates of 2026-11-12) 2026-11-12

The servers that had applied the patch were compromised just the same.

Huntback 2026-11-12

Additionally, N-able confirmed that Agent2Shell exploitation (like 4EverAble2Shell) requires the non-default Legacy API to be enabled.

on November 13 at 13:40:25 UTC, N-able said that it has identified Indicators of Compromise (IoCs) for customers that haven't disabled the Legacy API.

Huntress 2026-11-09
Updaterun 2026-11-11T0256Z-inteltitleheadlinesummarytagscvessourcesevidencesourcing_noteactionsbody

N-able released N-central 2026.4 Hotfix 2, build 2026.4.1.26, on 2026-11-10 as a critical security update; hosted servers are already upgraded, on-premises customers must upgrade their own servers, and every customer must upgrade Agents first and then Probes (N-able, 2026-11-10). Huntress lists seven CVE ids for the fixed flaws and relays N-able's status-page statement that it observed "scanning activity associated with the published proof-of-concept code" but no evidence that any customer environment was successfully exploited; Huntress has seen no exploitation in its partners' environments, and N-able's guidance is to keep on-premises servers offline until the upgrade is complete (Huntress, 2026-11-10). After the hotfix the built-in remote control is temporarily disabled and Take Control still works (N-able, 2026-11-10).

Updaterun 2026-11-13T0256Z-inteltitleheadlinesummarytagstechniquesaffected_productscvessourcesevidencesourcing_notereferencesactionsbody

The researcher's second exploit set, 4EverAble2Shell, published on 2026-11-12, works against Hotfix 2 builds when the Legacy API is turned on and reachable, and no fix exists. It pairs CVE-2026-90436 in the Apache Axis 1.x SOAP engine (Apache Axis project, 2026-11-06) with a separate root escalation (Huntback, 2026-11-12; BleepingComputer, 2026-11-12). Huntback counts at least 21 production servers, 19 of them on Hotfix 2, mining for one operator (Huntback, 2026-11-12), Previdian's honeypot recorded attempts at the chain (Previdian, 2026-11-12), and BleepingComputer relays both (BleepingComputer, 2026-11-12). N-able said on 2026-11-12 that it had seen no signs of compromise, had no fix for the new claims and planned a follow-up hotfix (Tenable, 2026-11-12); Huntress says a Hotfix 2 server with the Legacy API disabled is not exposed to this chain (Huntress, 2026-11-12).

Updaterun 2026-11-14T0255Z-inteltitleheadlinesummarytechniquessourcesevidencesourcing_notebody

The researcher's 2026-11-12 disclosure also includes Agent2Shell, which The Hacker News describes as more than ten zero-day flaws used to run commands as SYSTEM on managed Windows agents, assuming the attacker knows the target appliance ID (The Hacker News, 2026-11-12). Huntress describes it as a set of more than ten issues in how the N-central server communicates with Windows Agents and Probes, two chains of which let an unauthenticated attacker who can reach the server run commands on managed Windows endpoints, including as SYSTEM (Huntress, 2026-11-13). Huntress relays that N-able confirmed Agent2Shell, like 4EverAble2Shell, requires the non-default Legacy API to be enabled, which settles the question Huntress and Tenable had left open on 2026-11-12, and that on 2026-11-13 at 13:40 UTC N-able said it had identified indicators of compromise for customers that have not disabled the Legacy API (Huntress, 2026-11-13); the statement that N-able had seen no signs of compromise dates from 2026-11-12 (Tenable, 2026-11-12). Huntress has not observed exploitation of these issues in its partners' environments, and its Agent2Shell indicators come from static analysis of the proof of concept, not from attacks seen (Huntress, 2026-11-13). Tenable adds that N-able has temporarily deactivated the Intune integration for on-premises customers running it (Tenable, 2026-11-12).

Builds on: Confluence Data Center: Axis RCE (Remote API on) now exploited in N-able N-central; update to… · N-able hotfixes an exploited N-central auth bypass after its earlier fix proved bypassable · N-able ships a fourth emergency hotfix in a month after a fully patched N-central server was…

vulnerability10 Nov 03:51Zmulti-sourceOpen finding →

Co-occurring entities

Derived: referenced by the same focused operational entries (weekly summaries and report roundups don't count); ×N counts the shared entries.

Where this entity is cited

  • Vulns1

Source distribution

  • bleepingcomputer.com2 (15%)
  • euvdservices.enisa.europa.eu2 (15%)
  • censys.com1 (8%)
  • fieldeffect.com1 (8%)
  • huntback.io1 (8%)
  • huntress.com1 (8%)
  • openwall.com1 (8%)
  • previdian.com1 (8%)
  • other3 (23%)
All cited sources (13)