CVE-2026-41957

CVE-2026-41957 is a high-severity vulnerability in F5 Big-ip Access Policy Manager with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-502.

Key facts

• Severity: High (CVSS 3.x base score 8.8)
• CVSS v4: 8.7
• EPSS exploit prediction: 1% (40th percentile)
• Actively exploited: Not listed in CISA KEV
• EU (EUVD) id: EUVD-2026-29991
• Weakness: CWE-502
• Affected product: F5 Big-ip Access Policy Manager
• Published: 2026-05-13
• Last modified: 2026-06-23

Description

An authenticated remote code execution vulnerability through undisclosed vectors exists in the BIG-IP and BIG-IQ Configuration utility.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Frequently asked questions

What is CVE-2026-41957?

An authenticated remote code execution vulnerability through undisclosed vectors exists in the BIG-IP and BIG-IQ Configuration utility.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

How severe is CVE-2026-41957?

CVE-2026-41957 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-41957 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-41957?

CVE-2026-41957 primarily affects F5 Big-ip Access Policy Manager. In total, 22 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-41957?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-41957 have an EU (EUVD) identifier?

Yes. CVE-2026-41957 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29991.

When was CVE-2026-41957 published?

CVE-2026-41957 was published on 2026-05-13 and last updated on 2026-06-23.

References

• https://my.f5.com/manage/s/article/K000156761

Affected products (22)

• cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_advanced_web_application_firewall:*:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_analytics:*:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_application_acceleration_manager:*:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_application_visibility_and_reporting:*:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_automation_toolchain:*:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_carrier-grade_nat:*:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_container_ingress_services:*:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_ddos_hybrid_defender:*:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_edge_gateway:*:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_fraud_protection_service:*:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_global_traffic_manager:*:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_link_controller:*:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_policy_enforcement_manager:*:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_ssl_orchestrator:*:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_webaccelerator:*:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_websafe:*:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-iq_centralized_management:8.4.0:*:*:*:*:*:*:*

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• CVE-2023-41373 — Critical (CVSS 9.9): A directory traversal vulnerability exists in the BIG-IP Configuration Utility that may allow an authenticated attacker…
• CVE-2021-22987 — Critical (CVSS 9.9): On BIG-IP versions 16.0.x before 16.0.1.1, 15.1.x before 15.1.2.1, 14.1.x before 14.1.4, 13.1.x before 13.1.3.6, 12.1.x…
• CVE-2025-53521 — Critical (CVSS 9.8): When a BIG-IP APM access policy is configured on a virtual server, specific malicious traffic can lead to Remote Code…
• CVE-2023-46747 — Critical (CVSS 9.8): Undisclosed requests may bypass configuration utility authentication, allowing an attacker with network access to the…
• CVE-2022-1388 — Critical (CVSS 9.8): On F5 BIG-IP 16.1.x versions prior to 16.1.2.2, 15.1.x versions prior to 15.1.5.1, 14.1.x versions prior to 14.1.4.6,…
• CVE-2021-23008 — Critical (CVSS 9.8): On version 15.1.x before 15.1.3, 14.1.x before 14.1.4, 13.1.x before 13.1.4, 12.1.x before 12.1.6, and all versions of…

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