CVE-2026-94127: F5 BIG-IP APM Heap-based Buffer Overflow Vulnerability

Required action (CISA's text)

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Description (NVD)

F5 BIG-IP APM contains a heap-based buffer overflow vulnerability when access policy and an OAuth profile are configured on a virtual server. This vulnerability could allow an unauthenticated attacker to perform remote code execution.

SOURCES

• CISA KEVCISA Known Exploited Vulnerabilities catalog

Other F5 flaws

• CVE-2025-53521: F5 BIG-IP Stack-Based Buffer Overflow Vulnerability
• CVE-2023-46748: F5 BIG-IP Configuration Utility SQL Injection Vulnerability
• CVE-2023-46747: F5 BIG-IP Configuration Utility Authentication Bypass Vulnerability
• CVE-2022-1388: F5 BIG-IP Missing Authentication Vulnerability
• CVE-2021-22991: F5 BIG-IP Traffic Management Microkernel Buffer Overflow

Data from NVD, CISA KEV, FIRST EPSS and vendor advisories. Updated 10 Nov 2026.