CVE-2023-43746 - CVE House
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Status published High CVE-2023-43746

BIG-IP Appliance mode external monitor vulnerability

Vulnerability Description

When running in Appliance mode, an authenticated user assigned the Administrator role may be able to bypass Appliance mode restrictions, utilizing BIG-IP external monitor on a BIG-IP system.  A successful exploit can allow the attacker to cross a security boundary.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • F5

References

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CVE-2025-61958
BIG-IP TMSH vulnerability
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CVE-2025-61955
F5OS vulnerability
High 8.5

Affected Vendor

Affected Software

BIG-IP
Vulnerable Versions:
17.1.0, 16.1.0, 15.1.0, 14.1.0, 13.1.0

Timeline

Official Publish: October 10th, 2023
Last Modified: September 18th, 2024
Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N

Weaknesses (CWE)

CWE-267

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.