CVE-2026-42408
CVE-2026-42408 is a medium-severity vulnerability in F5 Big-ip Access Policy Manager with a CVSS 3.x base score of 4.4. 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-312.
Key facts
- Severity: Medium (CVSS 3.x base score 4.4)
- CVSS v4: 6.7
- EPSS exploit prediction: 0% (1st percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-29998
- Weakness: CWE-312
- Affected product: F5 Big-ip Access Policy Manager
- Published:
- Last modified:
Description
When BIG-IP DNS is provisioned, a vulnerability exists in an undisclosed TMOS Shell (tmsh) command that may allow a highly privileged authenticated attacker to view sensitive information. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Frequently asked questions
- What is CVE-2026-42408?
- When BIG-IP DNS is provisioned, a vulnerability exists in an undisclosed TMOS Shell (tmsh) command that may allow a highly privileged authenticated attacker to view sensitive information. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
- How severe is CVE-2026-42408?
- CVE-2026-42408 has a CVSS 3.x base score of 4.4, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
- Is CVE-2026-42408 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-42408?
- CVE-2026-42408 primarily affects F5 Big-ip Access Policy Manager. In total, 21 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2026-42408?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2026-42408 have an EU (EUVD) identifier?
- Yes. CVE-2026-42408 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29998.
- When was CVE-2026-42408 published?
- CVE-2026-42408 was published on 2026-05-13 and last updated on 2026-06-23.
References
Affected products (21)
- 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:*:*:*:*:*:*:*:*
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