Cyber Resilience

CVE-2025-43878

F5Os-A 1.5.1 – 1.8.0

Published
07 May 2025
Modified
17 June 2026
Patch / advisory
View advisory
CVSS Score v4 8.3
Click a component to see what it means
Raw vectorCVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:N/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 Score 0.0016 6th percentile
Risk Priority 25 floored blend · peak EPSS

Summary

CVE-2025-43878 is a high-severity Improper Neutralization of Quoting Syntax (CWE-149) vulnerability in F5 F5Os-A. Its CVSS base score is 8.3 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 6th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to SI-10 (Information Input Validation) — see the control section below for these in your framework.

EU & UK References

Vulnerability Data

When running in Appliance mode, an authenticated attacker assigned the Administrator or Resource Administrator role may be able to bypass Appliance mode restrictions utilizing system diagnostics tcpdump command utility on a F5OS-C/A system. Note: Software versions which have reached End…

more

of Technical Support (EoTS) are not evaluated.

CWE(s)
CWE-149CWE-1286

Related Threats

MITRE ATT&CK Enterprise Techniques

T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1059 Command and Scripting Interpreter Execution
Adversaries may abuse command and script interpreters to execute commands, scripts, or binaries.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2024-23607Same product: F5 F5Os-A
CVE-2025-60013Same product: F5 F5Os-A
CVE-2025-57780Same product: F5 F5Os-A
CVE-2023-22657Same product: F5 F5Os-A
CVE-2025-14727Same vendor: F5
CVE-2026-42926Same vendor: F5
CVE-2023-28406Same vendor: F5
CVE-2023-46748Same vendor: F5
CVE-2025-54755Same vendor: F5
CVE-2026-40703Same vendor: F5

Affected Assets

f5
f5os-a
1.5.1 — 1.8.0
f5
f5os-c
1.6.0 — 1.6.2

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V1.1.1
  • V1.4.2
  • V2.1.1
  • V2.2.2

Mitigating Controls (NIST 800-53 r5) AI

SI-10 Information Input Validation good match

Input validation directly stops malformed or injected quoting syntax from reaching parsers and causing unexpected actions.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

Secure SDLC practices directly require input neutralization and quoting handling to prevent injection flaws.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.29 Security testing in development and acceptance mostly match
finds

Security testing can detect quote-injection but does not itself implement the fix.

A.8.25 Secure development life cycle partial match
prevents

Secure development life cycle mandates input validation and output encoding that directly prevent quote-injection flaws.

A.8.26 Application security requirements partial match
prevents

Application security requirements explicitly call for neutralization of special characters such as quotes.

A.8.27 Secure system architecture and engineering principles partial match
prevents

Secure architecture principles reduce the attack surface but do not prescribe the specific quoting-neutralization technique.

A.8.28 Secure coding partial match
prevents

Secure coding standards require proper escaping or parameterization, directly eliminating CWE-149.

References