CVE-2026-39455
published 2026-05-13CVE-2026-39455: When the BIG-IP Configuration utility is configured to use Lightweight Directory Access Protocol (LDAP) authentication, undisclosed traffic can cause the httpd…
PriorityP347high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
0.30%
21.9th percentile
When the BIG-IP Configuration utility is configured to use Lightweight Directory Access Protocol (LDAP) authentication, undisclosed traffic can cause the httpd process to exhaust the available file descriptors. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Affected
89 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| f5 | big-ip | — | — |
| f5 | big-ip | >= 16.1.0 < * | * |
| f5 | big-ip | >= 17.1.0 < 17.1.3.2 | 17.1.3.2 |
| f5 | big-ip | >= 17.5.0 < 17.5.1.6 | 17.5.1.6 |
| f5 | big-ip | >= 21.0.0 < 21.0.0.2 | 21.0.0.2 |
| f5 | big-ip_access_policy_manager | — | — |
| f5 | big-ip_access_policy_manager | 16.1.0 – 16.1.6 | — |
| f5 | big-ip_access_policy_manager | 17.1.0 – 17.1.3 | — |
| f5 | big-ip_access_policy_manager | 17.5.0 – 17.5.1 | — |
| f5 | big-ip_advanced_firewall_manager | — | — |
| f5 | big-ip_advanced_firewall_manager | 16.1.0 – 16.1.6 | — |
| f5 | big-ip_advanced_firewall_manager | 17.1.0 – 17.1.3 | — |
| f5 | big-ip_advanced_firewall_manager | 17.5.0 – 17.5.1 | — |
| f5 | big-ip_advanced_web_application_firewall | — | — |
| f5 | big-ip_advanced_web_application_firewall | 16.1.0 – 16.1.6 | — |
| f5 | big-ip_advanced_web_application_firewall | 17.1.0 – 17.1.3 | — |
| f5 | big-ip_advanced_web_application_firewall | 17.5.0 – 17.5.1 | — |
| f5 | big-ip_analytics | — | — |
| f5 | big-ip_analytics | 16.1.0 – 16.1.6 | — |
| f5 | big-ip_analytics | 17.1.0 – 17.1.3 | — |
| f5 | big-ip_analytics | 17.5.0 – 17.5.1 | — |
| f5 | big-ip_application_acceleration_manager | — | — |
| f5 | big-ip_application_acceleration_manager | 16.1.0 – 16.1.6 | — |
| f5 | big-ip_application_acceleration_manager | 17.1.0 – 17.1.3 | — |
| f5 | big-ip_application_acceleration_manager | 17.5.0 – 17.5.1 | — |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
nvdv4.08.7HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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VulDB
F5 BIG-IP prior 17.1.3.2/17.5.1.6/21.0.0.2 LDAP release of resource (K000160874 / Nessus ID 316104)
vuldb·2026-05-24·CVSS 8.7
CVE-2026-39455 [HIGH] F5 BIG-IP prior 17.1.3.2/17.5.1.6/21.0.0.2 LDAP release of resource (K000160874 / Nessus ID 316104)
A vulnerability classified as critical has been found in F5 BIG-IP. The impacted element is an unknown function of the component LDAP. Performing a manipulation results in missing release of resource.
This vulnerability is cataloged as CVE-2026-39455. It is possible to initiate the attack remotely. There is no exploit available.
It is recommended to upgrade the affected component.
GHSA
GHSA-6225-9whv-x529: When the BIG-IP Configuration utility is configured to use Lightweight Directory Access Protocol (LDAP) authentication, undisclosed traffic can cause
ghsa_unreviewed·2026-05-13
CVE-2026-39455 [HIGH] CWE-772 GHSA-6225-9whv-x529: When the BIG-IP Configuration utility is configured to use Lightweight Directory Access Protocol (LDAP) authentication, undisclosed traffic can cause
When the BIG-IP Configuration utility is configured to use Lightweight Directory Access Protocol (LDAP) authentication, undisclosed traffic can cause the httpd process to exhaust the available file descriptors. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
F5
CVE-2026-39455: When the BIG-IP Configuration utility is configured to use Lightweight Directory Access Protocol (LDAP) authenticatio...
vendor_f5·2026-05-13·CVSS 8.7
CVE-2026-39455 [HIGH] CWE-772 CVE-2026-39455: When the BIG-IP Configuration utility is configured to use Lightweight Directory Access Protocol (LDAP) authenticatio...
CVE-2026-39455: When the BIG-IP Configuration utility is configured to use Lightweight Directory Access Protocol (LDAP) authenticatio...
When the BIG-IP Configuration utility is configured to use Lightweight Directory Access Protocol (LDAP) authentication, undisclosed traffic can cause the httpd process to exhaust the available file descriptors. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Affected Products: BIG-IP
F5 Advisory Articles: K000160874
F5 References: https://my.f5.com/manage/s/article/K000160874
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2026-05-13
Published