# CVE-2026-40618

## Summary

- **CVE ID:** CVE-2026-40618
- **Severity:** HIGH
- **CVSS Score:** 8.7 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L)
- **CWE:** CWE-131
- **Published:** May 13, 2026
- **Last Modified:** May 13, 2026

## 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

- F5 — BIG-IP (21.1.0)
- F5 — BIG-IP (21.0.0)
- F5 — BIG-IP (17.5.0)
- F5 — BIG-IP (17.1.0)
- F5 — BIG-IP (16.1.0)
- F5 — BIG-IP Next SPK (2.0.0)
- F5 — BIG-IP Next SPK (1.7.0)
- F5 — BIG-IP Next CNF (2.0.0)
- F5 — BIG-IP Next CNF (1.1.0)
- F5 — BIG-IP Next for Kubernetes (2.0.0)

## References

- [CNA](https://my.f5.com/manage/s/article/K000158082)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.32%
- **EPSS Percentile:** 25.3

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._