CVE-2025-23239Network attack vector

Security-boundary escape via REST command injection

Published Feb 5, 2025 · Updated Feb 26, 2026

Command injection in F5 BIG-IP 17.1.1 allows remote authenticated users with a highly privileged role to cross a security boundary. An undisclosed iControl REST endpoint fails to neutralize special elements in command input before invoking a system command. Exploitation requires Appliance mode and a highly privileged account, and permits unauthorized reading or modification across that boundary without reported service interruption.

CVSS severity8.5
High
EPSS probability0.76%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in F5 BIG-IP 17.1.1 allows remote authenticated users with a highly privileged role to cross a security boundary. An undisclosed iControl REST endpoint fails to neutralize special elements in command input before invoking a system command. Exploitation requires Appliance mode and a highly privileged account, and permits unauthorized reading or modification across that boundary without reported service interruption.

The record

CVE
CVE-2025-23239
Published
Feb 5, 2025
Updated
Feb 26, 2026
Vendor
F5 Networks
Product
BIG-IP
Classifications
CWE-77, T1059
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Feb 5, 2025CVE publishedPublication date reported by the CVE source.
  2. Feb 26, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=17.1.1 <17.1.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

F5 Networks · BIG-IPversion=17.1.1 <17.1.2

Published CVSS scores

8.5F5CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
8.7F5CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
T1059Command and Scripting Interpreter

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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