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SAP Gateway: default access control list treats an external attacker as an internal application server, CVSS 10.0, in SAP's CNA record of 2026-11-10 (note 3798345)

cve · CVE-2026-89103 single-source

Coverage
1
first 2026-11-10 → last 2026-11-10
Latest activity
2026-11-10
SAP's CVE records list four unauthenticated CVSS 10.0 flaws in Web Dispatcher, ICM, Gateway and the ABAP…
Peak priority
notable
1 notable
Targets
·
no sector or region stated
Sources cited
4
1 hosts

Action items (1)

Do-now tasks recorded on the entries about CVE-2026-89103, newest first. Check the date before acting on an older one.

  • Pull SAP Security Notes 3849308, 3778556, 3778530 and 3798345 as soon as SAP's Patch Day page lists them and apply the kernel or support-package fix each names, starting with systems whose Web Dispatcher, Internet Communication Manager or Gateway ports are reachable from untrusted networks.
    2026-11-10CVE-2026-120017 +3

Defender insights

What each entry about CVE-2026-89103 tells a defender to do, newest first.

2026-11-10NOTABLESAP's CVE records list four unauthenticated CVSS 10.0 flaws in Web Dispatcher, ICM, Gateway and the ABAP SAML2 service

Exposure · detection

Story timeline

  1. 2026-11-10CVE-2026-120017, CVE-2026-89126, CVE-2026-76964 and CVE-2026-89103, SAP NetWeaver AS ABAP, Web Dispatcher and Gateway: four unauthenticated network flaws rated CVSS 10.0 in SAP's CVE records of 2026-11-10, published ahead of Patch Day; no exploitation reported
    trending-vulnerabilitiesSAP's CVE records list four unauthenticated CVSS 10.0 flaws in Web Dispatcher, ICM, Gateway and the ABAP SAML2 service
ATT&CK techniques (2 across 4 tactics)

2 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 AccessValid Accounts · Exploit Public-Facing Application
  • PersistenceValid Accounts
  • Privilege EscalationValid Accounts
  • StealthValid Accounts

Initial Access TA0001

T1078Valid Accounts×1

Adversaries may obtain and abuse credentials of existing accounts as a means of gaining Initial Access, Persistence, Privilege Escalation, or Defense Evasion. Compromised credentials may be used to bypass access controls placed on various resources on systems within the network and may even be used for persistent access to remote systems and externally available services, such as VPNs, Outlook Web Access, network devices, and remote desktop. Compromised credentials may also grant an adversary increased privilege to specific systems or access to restricted areas of the network. Adversaries may choose not to use malware or tools in conjunction with the legitimate access those credentials provide to make it harder to detect their presence.

Evidence: 2026-11-10/sap-november-2026-cna-records-four-unauth-cvss-10-rows · ATT&CK page ↗

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/sap-november-2026-cna-records-four-unauth-cvss-10-rows · ATT&CK page ↗

Persistence TA0003

T1078Valid Accounts×1

Adversaries may obtain and abuse credentials of existing accounts as a means of gaining Initial Access, Persistence, Privilege Escalation, or Defense Evasion. Compromised credentials may be used to bypass access controls placed on various resources on systems within the network and may even be used for persistent access to remote systems and externally available services, such as VPNs, Outlook Web Access, network devices, and remote desktop. Compromised credentials may also grant an adversary increased privilege to specific systems or access to restricted areas of the network. Adversaries may choose not to use malware or tools in conjunction with the legitimate access those credentials provide to make it harder to detect their presence.

Evidence: 2026-11-10/sap-november-2026-cna-records-four-unauth-cvss-10-rows · ATT&CK page ↗

Privilege Escalation TA0004

T1078Valid Accounts×1

Adversaries may obtain and abuse credentials of existing accounts as a means of gaining Initial Access, Persistence, Privilege Escalation, or Defense Evasion. Compromised credentials may be used to bypass access controls placed on various resources on systems within the network and may even be used for persistent access to remote systems and externally available services, such as VPNs, Outlook Web Access, network devices, and remote desktop. Compromised credentials may also grant an adversary increased privilege to specific systems or access to restricted areas of the network. Adversaries may choose not to use malware or tools in conjunction with the legitimate access those credentials provide to make it harder to detect their presence.

Evidence: 2026-11-10/sap-november-2026-cna-records-four-unauth-cvss-10-rows · ATT&CK page ↗

Stealth TA0005

T1078Valid Accounts×1

Adversaries may obtain and abuse credentials of existing accounts as a means of gaining Initial Access, Persistence, Privilege Escalation, or Defense Evasion. Compromised credentials may be used to bypass access controls placed on various resources on systems within the network and may even be used for persistent access to remote systems and externally available services, such as VPNs, Outlook Web Access, network devices, and remote desktop. Compromised credentials may also grant an adversary increased privilege to specific systems or access to restricted areas of the network. Adversaries may choose not to use malware or tools in conjunction with the legitimate access those credentials provide to make it harder to detect their presence.

Evidence: 2026-11-10/sap-november-2026-cna-records-four-unauth-cvss-10-rows · ATT&CK page ↗

Entries about SAP Gateway: default access control list treats an external attacker as an internal application server, CVSS 10.0, in SAP's CNA record of 2026-11-10 (note 3798345) (1)

2026-11-10 · view entry permalink →

NOTABLECVE-2026-120017 +3NATOA2

CVE-2026-120017, CVE-2026-89126, CVE-2026-76964 and CVE-2026-89103, SAP NetWeaver AS ABAP, Web Dispatcher and Gateway: four unauthenticated network flaws rated CVSS 10.0 in SAP's CVE records of 2026-11-10, published ahead of Patch Day; no exploitation reported

SAP, acting as CNA, published CVE records on 2026-11-10 for four flaws it scores CVSS 3.1 10.0, each reachable over the network without privileges or user interaction and with changed scope. In the SAML2 service provider of NetWeaver AS ABAP and the ABAP Platform, an unauthenticated attacker could submit crafted data, under certain configurations, to bypass authentication and impersonate arbitrary users, privileged accounts included (CVE-2026-120017, note 3849308) (ENISA EUVD, 2026-11-10). In SAP Web Dispatcher, crafted network traffic triggers a memory corruption that could allow arbitrary code execution and full compromise (CVE-2026-89126, note 3778556) (ENISA EUVD, 2026-11-10), and the Internet Communication Manager of NetWeaver AS ABAP has the same class of flaw (CVE-2026-76964, note 3778530) (ENISA EUVD, 2026-11-10). SAP Gateway activates its default access control list with high privileges, so an external attacker with network access is treated as an internal application server and can perform unauthorized actions (CVE-2026-89103, note 3798345) (ENISA EUVD, 2026-11-10).

The records list SAP_BASIS 702, 731, 740, 750 to 758, 816 and 920 to 922 for the SAML2 flaw (ENISA EUVD, 2026-11-10); kernel and Web Dispatcher builds 7.53, 7.54, 7.77, 7.93, 9.16, 9.18 and 9.20 for the Web Dispatcher and Internet Communication Manager flaws, the Web Dispatcher record adding HDB 2.00, XS_ADVANCED_RUNTIME 1.00 and SAP_EXTENDED_APP_SERVICES 1 (ENISA EUVD, 2026-11-10; ENISA EUVD, 2026-11-10); and kernel 7.22 to 9.21 for the Gateway flaw (ENISA EUVD, 2026-11-10). Each record points to the SAP Security Note that carries the fix; none names exploitation or a public proof of concept, and ENISA shows an EPSS value of 0.0 for each. An anonymous path to code execution or to impersonating a privileged user on a network-facing SAP component forces the timeline by itself, whether or not anyone exploits it yet.

An unauthenticated attacker could submit specially crafted data to bypass authentication and impersonate arbitrary users, including privileged accounts.

SAP CNA record CVE-2026-120017, via ENISA EUVD 2026-11-10

An unauthenticated attacker could send specially crafted network traffic to trigger a memory corruption condition in the affected functionality.

SAP CNA record CVE-2026-89126, via ENISA EUVD 2026-11-10

SAP Gateway activates the default Access Control List with high privileges allowing categorization of external attacker as internal application server.

SAP CNA record CVE-2026-89103, via ENISA EUVD 2026-11-10
vulnerability10 Nov 03:53Zsingle-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

  • euvdservices.enisa.europa.eu4 (100%)