Log in Start free

Vulnerability · Published May 13, 2026 · Assigned by f5

CVE-2026-40618BIG-IP SSL/TLS vulnerability

High 7.5

In plain English

A high-severity security flaw in BIG-IP from F5. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 26% of all known vulnerabilities).

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.3%top 74.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

When an SSL profile is configured on a virtual server on BIG-IP Virtual Edition (VE) without Intel QuickAssist Technology (QAT) or on BIG-IP hardware platforms with the database variable crypto.hwacceleration set to disabled, undisclosed traffic can cause the Traffic Management Microkernel (TMM) to terminate.   Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Affected products (as reported)

VendorProductVersions
F5 BIG-IP 21.0.0 – before 21.0.0.117.5.0 – before 17.1.5.417.1.0 – before 17.1.3.116.1.0 – before *
F5 BIG-IP Next SPK 2.0.0 – before *1.7.0 – before *
F5 BIG-IP Next CNF 2.0.0 – before *1.1.0 – before *
F5 BIG-IP Next for Kubernetes 2.0.0 – before 2.2.0

Weakness: CWE-131 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References