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CVE-2026-42919

HIGHCVSS 7.1/10EPSS 0.29%

Last modified

CVE-2026-42919 is a high-severity vulnerability rated 7.1/10 on the CVSS scale. A vulnerability exists in BIG-IP systems that may allow an authenticated attacker with administrative access to escalate their privileges. A successful exploit may allow the attacker to cross a security boundary.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.. EPSS estimates a 0.29% chance of exploitation in the next 30 days.

Description

A vulnerability exists in BIG-IP systems that may allow an authenticated attacker with administrative access to escalate their privileges. A successful exploit may allow the attacker to cross a security boundary.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Metrics

CVSS 3.1
6.7/10

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:H

CVSS 4.0
7.1/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability
0.29%

20.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
F5Big-Ip Access Policy Manager>= 17.1.0, <= 17.1.3
F5Big-Ip Access Policy Manager>= 17.5.0, <= 17.5.1
F5Big-Ip Advanced Firewall Manager>= 17.1.0, <= 17.1.3
F5Big-Ip Advanced Firewall Manager>= 17.5.0, <= 17.5.1
F5Big-Ip Advanced Web Application Firewall>= 17.1.0, <= 17.1.3
F5Big-Ip Advanced Web Application Firewall>= 17.5.0, <= 17.5.1
F5Big-Ip Analytics>= 17.1.0, <= 17.1.3
F5Big-Ip Analytics>= 17.5.0, <= 17.5.1
F5Big-Ip Application Acceleration Manager>= 17.1.0, <= 17.1.3
F5Big-Ip Application Acceleration Manager>= 17.5.0, <= 17.5.1
F5Big-Ip Application Security Manager>= 17.1.0, <= 17.1.3
F5Big-Ip Application Security Manager>= 17.5.0, <= 17.5.1
F5Big-Ip Application Visibility And Reporting>= 17.1.0, <= 17.1.3
F5Big-Ip Application Visibility And Reporting>= 17.5.0, <= 17.5.1
F5Big-Ip Automation Toolchain>= 17.1.0, <= 17.1.3
F5Big-Ip Automation Toolchain>= 17.5.0, <= 17.5.1
F5Big-Ip Carrier-Grade Nat>= 17.1.0, <= 17.1.3
F5Big-Ip Carrier-Grade Nat>= 17.5.0, <= 17.5.1
F5Big-Ip Container Ingress Services>= 17.1.0, <= 17.1.3
F5Big-Ip Container Ingress Services> 17.5.0, <= 17.5.1
F5Big-Ip Ddos Hybrid Defender>= 17.1.0, <= 17.1.3
F5Big-Ip Ddos Hybrid Defender>= 17.5.0, <= 17.5.1
F5Big-Ip Domain Name System>= 17.1.0, <= 17.1.3
F5Big-Ip Domain Name System>= 17.5.0, <= 17.5.1
F5Big-Ip Edge Gateway>= 17.1.0, <= 17.1.3
F5Big-Ip Edge Gateway>= 17.5.0, <= 17.5.1
F5Big-Ip Fraud Protection Service>= 17.1.0, <= 17.1.3
F5Big-Ip Fraud Protection Service>= 17.5.0, <= 17.5.1
F5Big-Ip Global Traffic Manager>= 17.1.0, <= 17.1.3
F5Big-Ip Global Traffic Manager>= 17.5.0, <= 17.5.1
F5Big-Ip Link Controller>= 17.1.0, <= 17.1.3
F5Big-Ip Link Controller>= 17.5.0, <= 17.5.1
F5Big-Ip Local Traffic Manager>= 17.1.0, <= 17.1.3
F5Big-Ip Local Traffic Manager>= 17.5.0, <= 17.5.1
F5Big-Ip Policy Enforcement Manager>= 17.1.0, <= 17.1.3
F5Big-Ip Policy Enforcement Manager>= 17.5.0, <= 17.5.1
F5Big-Ip Ssl Orchestrator>= 17.1.0, <= 17.1.3
F5Big-Ip Ssl Orchestrator>= 17.5.0, <= 17.5.1
F5Big-Ip Webaccelerator>= 17.1.0, <= 17.1.3
F5Big-Ip Webaccelerator>= 17.5.0, <= 17.5.1
F5Big-Ip Websafe>= 17.1.0, <= 17.1.3
F5Big-Ip Websafe>= 17.5.0, <= 17.5.1
F5Big-Ip Access Policy Manager21.0.0
F5Big-Ip Advanced Firewall Manager21.0.0
F5Big-Ip Advanced Web Application Firewall21.0.0
F5Big-Ip Analytics21.0.0
F5Big-Ip Application Acceleration Manager21.0.0
F5Big-Ip Application Security Manager21.0.0
F5Big-Ip Application Visibility And Reporting21.0.0
F5Big-Ip Automation Toolchain21.0.0

Showing 50 of 84 affected configurations. See NVD for the full list.

References

Timeline

Published
Last Modified
Status
Analyzed

Frequently Asked Questions

What is CVE-2026-42919?
A vulnerability exists in BIG-IP systems that may allow an authenticated attacker with administrative access to escalate their privileges. A successful exploit may allow the attacker to cross a security boundary.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
How severe is CVE-2026-42919?
CVE-2026-42919 has a CVSS score of 7.1/10 (HIGH severity). The EPSS model estimates a 0.29% probability of exploitation in the next 30 days.
How do I fix CVE-2026-42919?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-42919?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST