CVE-2026-40629

BIG-IP SSL/TLS vulnerability

Published May 13, 2026 CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Description
When SSL profiles are configured on a virtual server, undisclosed traffic can cause the virtual server to stop processing new client connections.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared F5
F5 big-ip
F5 big-ip Next Cnf
F5 big-ip Next For Kubernetes
F5 big-ip Next Spk
Vendors & Products F5
F5 big-ip
F5 big-ip Next Cnf
F5 big-ip Next For Kubernetes
F5 big-ip Next Spk
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description When SSL profiles are configured on a virtual server, undisclosed traffic can cause the virtual server to stop processing new client connections.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Title BIG-IP SSL/TLS vulnerability
Weaknesses CWE-770
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
f5
Published
Updated
May 13, 2026, 4:14 PM
Reserved
Apr 30, 2026, 11:02 PM
Status
Analyzed
Published
May 13, 2026, 4:16 PM
Modified
Oct 26, 2026, 5:10 PM