How severe is CVE-2022-26517?

CVE-2022-26517 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2022-26517 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-26517?

CVE-2022-26517 primarily affects F5 Big-ip Access Policy Manager. In total, 198 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2022-26517?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2022-26517 published?

CVE-2022-26517 was published on 2022-05-05 and last updated on 2026-06-17.

CVE-2022-26517

CVE-2022-26517 is a medium-severity vulnerability in F5 Big-ip Access Policy Manager with a CVSS 3.x base score of 5.9. 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-682.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
CVSS v2: 5.0
EPSS exploit prediction: 1% (51st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-682
Affected product: F5 Big-ip Access Policy Manager
Published: 2022-05-05
Last modified: 2026-06-17

Description

On F5 BIG-IP 15.1.x versions prior to 15.1.5.1, 14.1.x versions prior to 14.1.4.6, and 13.1.x versions prior to 13.1.5, when the BIG-IP CGNAT Large Scale NAT (LSN) pool is configured on a virtual server and packet filtering is enabled, undisclosed requests can cause the Traffic Management Microkernel (TMM) to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated

Frequently asked questions

What is CVE-2022-26517?: On F5 BIG-IP 15.1.x versions prior to 15.1.5.1, 14.1.x versions prior to 14.1.4.6, and 13.1.x versions prior to 13.1.5, when the BIG-IP CGNAT Large Scale NAT (LSN) pool is configured on a virtual server and packet filtering is enabled, undisclosed requests can cause the Traffic Management Microkernel (TMM) to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated
How severe is CVE-2022-26517?: CVE-2022-26517 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2022-26517 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-26517?: CVE-2022-26517 primarily affects F5 Big-ip Access Policy Manager. In total, 198 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2022-26517?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2022-26517 published?: CVE-2022-26517 was published on 2022-05-05 and last updated on 2026-06-17.

References

https://support.f5.com/csp/article/K54082580

Affected products (198)

cpe:2.3:a:f5:big-ip_access_policy_manager:13.1.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_access_policy_manager:13.1.1:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_access_policy_manager:13.1.3:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_access_policy_manager:13.1.4:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_access_policy_manager:13.1.5:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_access_policy_manager:14.1.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_access_policy_manager:14.1.2:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_access_policy_manager:14.1.3:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_access_policy_manager:14.1.4:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_access_policy_manager:15.1.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_access_policy_manager:15.1.1:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_access_policy_manager:15.1.2:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_access_policy_manager:15.1.3:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_access_policy_manager:15.1.4:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_access_policy_manager:15.1.5:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_access_policy_manager:16.1.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_access_policy_manager:16.1.1:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_access_policy_manager:16.1.2:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_advanced_firewall_manager:13.1.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_advanced_firewall_manager:13.1.1:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_advanced_firewall_manager:13.1.3:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_advanced_firewall_manager:13.1.4:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_advanced_firewall_manager:13.1.5:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_advanced_firewall_manager:14.1.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_advanced_firewall_manager:14.1.2:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_advanced_firewall_manager:14.1.3:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_advanced_firewall_manager:14.1.4:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_advanced_firewall_manager:15.1.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_advanced_firewall_manager:15.1.1:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_advanced_firewall_manager:15.1.2:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_advanced_firewall_manager:15.1.3:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_advanced_firewall_manager:15.1.4:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_advanced_firewall_manager:15.1.5:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_advanced_firewall_manager:16.1.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_advanced_firewall_manager:16.1.1:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_advanced_firewall_manager:16.1.2:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_analytics:13.1.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_analytics:13.1.1:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_analytics:13.1.3:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_analytics:13.1.4:*:*:*:*:*:*:*

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