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3806 articles · 153211 vulns · 38/41 feeds (7d)
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7.5
CVE-2026-39455EXPLOITEDPATCHED
f5 · big-ip

BIG-IP Configuration utility vulnerability

Description

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

VendorProductVersions
f5big-ip21.0.0, 17.5.0, 17.1.0, 16.1.0

References

  • https://my.f5.com/manage/s/article/K000160874(vendor-advisory, patch)

Related News (1 articles)

Tier C
VulDB6h ago
CVE-2026-39455 | F5 BIG-IP prior 17.1.3.2/17.5.1.6/21.0.0.2 LDAP release of resource (K000160874)
→ No new info (linked only)
CVSS 3.17.5 HIGH
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA KEV❌ No
Actively exploited✅ Yes
Patch available
21.1.021.0.0.217.5.1.617.1.3.2*
CWECWE-772
PublishedMay 13, 2026
Last enriched5h agov2
Trending Score55
Source articles1
Independent1
Info Completeness9/14
Missing: epss, kev, exploit, iocs, mitre_attack

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Related CVEs (5)

CRITICALCVE-2026-42945EXP
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MEDIUMCVE-2026-40701EXP
NGINX ngx_http_ssl_module vulnerability
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MEDIUMCVE-2026-42934EXP
NGINX ngx_http_charset_module vulnerability
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HIGHCVE-2026-40629EXP
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HIGHCVE-2026-40618EXP
BIG-IP SSL/TLS vulnerability
Trending: 55

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Verification

State: unverified
Confidence: 0%

Vulnerability Timeline

CVE Published
May 13, 2026
Discovered by ZDM
May 13, 2026
Updated: severity, activelyExploited
May 13, 2026
Actively Exploited
May 13, 2026
Patch Available
May 13, 2026

Version History

v2
Last enriched 5h ago
v2Tier C5h ago

Updated severity to CRITICAL, marked as actively exploited, and noted that no exploit is available.

severityactivelyExploited
via VulDB
v16h ago

Initial creation