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CVE Vulnerability Details :
CVE-2026-40618
PUBLISHED
More InfoOfficial Page
Assigner-f5
Assigner Org ID-9dacffd4-cb11-413f-8451-fbbfd4ddc0ab
View Known Exploited Vulnerability (KEV) details
Published At-13 May, 2026 | 14:12
Updated At-13 May, 2026 | 16:13
Rejected At-
▼CVE Numbering Authority (CNA)
BIG-IP SSL/TLS vulnerability

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
Vendor
F5, Inc.F5
Product
BIG-IP
Modules
  • All Modules
Default Status
unknown
Versions
Affected
  • From 21.0.0 before 21.0.0.1 (custom)
  • From 17.5.0 before 17.1.5.4 (custom)
  • From 17.1.0 before 17.1.3.1 (custom)
  • From 16.1.0 before * (custom)
Unaffected
  • From 21.1.0 before * (custom)
Vendor
F5, Inc.F5
Product
BIG-IP Next SPK
Default Status
unknown
Versions
Affected
  • From 2.0.0 before * (custom)
  • From 1.7.0 before * (custom)
Vendor
F5, Inc.F5
Product
BIG-IP Next CNF
Default Status
unknown
Versions
Affected
  • From 2.0.0 before * (custom)
  • From 1.1.0 before * (custom)
Vendor
F5, Inc.F5
Product
BIG-IP Next for Kubernetes
Default Status
unaffected
Versions
Affected
  • From 2.0.0 before 2.2.0 (custom)
Problem Types
TypeCWE IDDescription
CWECWE-131CWE-131 Incorrect Calculation of Buffer Size
Type: CWE
CWE ID: CWE-131
Description: CWE-131 Incorrect Calculation of Buffer Size
Metrics
VersionBase scoreBase severityVector
3.17.5HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
4.08.7HIGH
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
Version: 3.1
Base score: 7.5
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Version: 4.0
Base score: 8.7
Base severity: HIGH
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:L
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
finder
F5
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://my.f5.com/manage/s/article/K000158082
vendor-advisory
patch
Hyperlink: https://my.f5.com/manage/s/article/K000158082
Resource:
vendor-advisory
patch
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Details not found