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SonicWall SonicOS management interface: permissive cross-domain policy (CVSS 3.1 8.8)

cve · CVE-2026-107155

Coverage
1
first 2026-11-07 → last 2026-11-07
Latest activity
2026-11-07
SonicWall SSL VPN bypasses SAML MFA and CISA lists it exploited; upgrade Gen7 to 7.3.4-7013, Gen8 to…
Peak priority
high
1 high
Targets
·
no sector or region stated
Sources cited
3
3 hosts

Action items (1)

Do-now tasks recorded on the entries about CVE-2026-107155, newest first. Check the date before acting on an older one.

  • Upgrade every SonicWall Gen7 firewall and NSv that serves SAML SSLVPN logins to SonicOS 7.3.4-7013 or later and every Gen8 firewall and NSv to 8.2.3-8015 or later now, because SonicWall lists no workaround and CISA lists the flaw as exploited.
    2026-11-07CVE-2026-19868 +3

Defender insights

What each entry about CVE-2026-107155 tells a defender to do, newest first.

2026-11-07HIGHexploitedSonicWall SSL VPN bypasses SAML MFA and CISA lists it exploited; upgrade Gen7 to 7.3.4-7013, Gen8 to 8.2.3-8015

Exposure · triage · detection

Story timeline

  1. 2026-11-07CVE-2026-19868, SonicWall SonicOS SSLVPN: valid credentials for an alternate authentication method bypass SAML and the MFA it enforces; SonicWall investigated a report of exploitation and CISA lists it as exploited (CVSS 3.1 7.1)
    trending-vulnerabilitiesSonicWall SSL VPN bypasses SAML MFA and CISA lists it exploited; upgrade Gen7 to 7.3.4-7013, Gen8 to 8.2.3-8015
ATT&CK techniques (3 across 4 tactics)

3 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 v20.0 · compare on the matrix · Navigator layer (JSON)

  • Initial AccessValid Accounts · External Remote Services · Exploit Public-Facing Application
  • PersistenceValid Accounts · External Remote Services
  • 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: 2026-11-07/cve-2026-19868-sonicwall-sonicos-sslvpn-saml-mfa-bypass-kev · ATT&CK page ↗

T1133External Remote Services×1

Adversaries may leverage external-facing remote services to initially access and/or persist within a network. Remote services such as VPNs, Citrix, and other access mechanisms allow users to connect to internal enterprise network resources from external locations. There are often remote service gateways that manage connections and credential authentication for these services. Services such as Windows Remote Management and VNC can also be used externally.

Evidence: 2026-11-07/cve-2026-19868-sonicwall-sonicos-sslvpn-saml-mfa-bypass-kev · 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: 2026-11-07/cve-2026-19868-sonicwall-sonicos-sslvpn-saml-mfa-bypass-kev · 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: 2026-11-07/cve-2026-19868-sonicwall-sonicos-sslvpn-saml-mfa-bypass-kev · ATT&CK page ↗

T1133External Remote Services×1

Adversaries may leverage external-facing remote services to initially access and/or persist within a network. Remote services such as VPNs, Citrix, and other access mechanisms allow users to connect to internal enterprise network resources from external locations. There are often remote service gateways that manage connections and credential authentication for these services. Services such as Windows Remote Management and VNC can also be used externally.

Evidence: 2026-11-07/cve-2026-19868-sonicwall-sonicos-sslvpn-saml-mfa-bypass-kev · 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: 2026-11-07/cve-2026-19868-sonicwall-sonicos-sslvpn-saml-mfa-bypass-kev · 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: 2026-11-07/cve-2026-19868-sonicwall-sonicos-sslvpn-saml-mfa-bypass-kev · ATT&CK page ↗

Entries about SonicWall SonicOS management interface: permissive cross-domain policy (CVSS 3.1 8.8) (1)

2026-11-07 · view entry permalink →

HIGHCVE-2026-19868 +3exploitedNATOA2

CVE-2026-19868, SonicWall SonicOS SSLVPN: valid credentials for an alternate authentication method bypass SAML and the MFA it enforces; SonicWall investigated a report of exploitation and CISA lists it as exploited (CVSS 3.1 7.1)

SonicWall's advisory SNWLID-2026-0014 of 2026-11-06 fixes seven SonicOS flaws on Gen7 and Gen8 firewalls, and one of them, CVE-2026-19868, is an authentication enforcement weakness in the SSLVPN service: a user with valid credentials for an alternate authentication method may bypass the SAML authentication controls, and successful exploitation may also bypass SAML-enforced multi-factor authentication (SonicWall PSIRT, 2026-11-06). SonicWall says the flaw only affects SSLVPN when SAML is enabled for SSLVPN logins, and scores it CVSS 3.1 7.1 as a use of single-factor authentication (CWE-308) (SonicWall PSIRT, 2026-11-06). The advisory says SonicWall PSIRT "has investigated a report indicating potential exploitation" and urges customers to upgrade, with no workaround available (SonicWall PSIRT, 2026-11-06); CISA added the flaw to its Known Exploited Vulnerabilities catalog on 2026-11-06 "based on evidence of active exploitation" (CISA, 2026-11-06). SonicWall has not shared details about the reported exploitation (BleepingComputer, 2026-11-06).

The advisory applies one table to all seven flaws: Gen7 hardware firewalls (TZ, NSa and NSsp) and Gen7 NSv up to and including 7.3.3-7015 are fixed in 7.3.4-7013 and higher, and Gen8 hardware firewalls (TZ and NSa) and Gen8 NSv up to and including 8.2.2-8015 are fixed in 8.2.3-8015 and higher (SonicWall PSIRT, 2026-11-06). It also fixes two management-interface flaws scored 8.8 that in specific conditions could potentially let a remote unauthenticated attacker perform unauthorized operations, and that need user interaction, a pre-authentication heap overflow in the SSL-VPN service that could cause a denial of service, and three lower-severity flaws; no source reports them exploited (SonicWall PSIRT, 2026-11-06).

Triage: a legitimate SAML sign-in leaves an event at the identity provider; a login through the alternate path does not, which follows from the stated mechanism.

SonicWall PSIRT has investigated a report indicating potential exploitation of this vulnerability.

NOTE: This vulnerability ONLY impacts the SonicOS SSLVPN interface or service if SAML is enabled for SSLVPN logins.

SonicWall PSIRT

based on evidence of active exploitation

CISA 2026-11-06
vulnerability07 Nov 03:58Zmulti-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.com1 (33%)
  • cisa.gov1 (33%)
  • psirt.global.sonicwall.com1 (33%)