CVE-2026-34176: CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') in F5 BIG-IP
When running in Appliance mode, an authenticated remote command injection vulnerability exists in an undisclosed iControl REST endpoint. A successful exploit can allow the attacker to cross a security boundary. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-34176) in F5 BIG-IP occurs due to improper neutralization of special elements in OS commands (CWE-78) within an authenticated iControl REST endpoint when running in Appliance mode. An attacker with valid credentials and high privileges can inject OS commands remotely, potentially crossing security boundaries and compromising system confidentiality and integrity. The CVSS 3.1 base score is 8.7, indicating high severity with network attack vector, low attack complexity, no user interaction, and scope change. Affected versions include 21.0.0, 17.5.0, 17.1.0, and 16.1.0. No official patch or vendor advisory is currently available to confirm remediation status.
Potential Impact
Exploitation of this vulnerability can lead to unauthorized OS command execution by an authenticated user with high privileges, resulting in a breach of confidentiality and integrity of the affected system. Availability is not impacted. The vulnerability allows crossing of security boundaries within the appliance, which could facilitate further compromise or data exposure.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict access to the iControl REST interface to trusted administrators only and monitor for unusual activity. Do not assume the vulnerability is mitigated without vendor confirmation.
CVE-2026-34176: CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') in F5 BIG-IP
Description
When running in Appliance mode, an authenticated remote command injection vulnerability exists in an undisclosed iControl REST endpoint. A successful exploit can allow the attacker to cross a security boundary. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-34176) in F5 BIG-IP occurs due to improper neutralization of special elements in OS commands (CWE-78) within an authenticated iControl REST endpoint when running in Appliance mode. An attacker with valid credentials and high privileges can inject OS commands remotely, potentially crossing security boundaries and compromising system confidentiality and integrity. The CVSS 3.1 base score is 8.7, indicating high severity with network attack vector, low attack complexity, no user interaction, and scope change. Affected versions include 21.0.0, 17.5.0, 17.1.0, and 16.1.0. No official patch or vendor advisory is currently available to confirm remediation status.
Potential Impact
Exploitation of this vulnerability can lead to unauthorized OS command execution by an authenticated user with high privileges, resulting in a breach of confidentiality and integrity of the affected system. Availability is not impacted. The vulnerability allows crossing of security boundaries within the appliance, which could facilitate further compromise or data exposure.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict access to the iControl REST interface to trusted administrators only and monitor for unusual activity. Do not assume the vulnerability is mitigated without vendor confirmation.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- f5
- Date Reserved
- 2026-04-30T23:04:19.989Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a049708cbff5d8610dff45f
Added to database: 5/13/2026, 3:21:44 PM
Last enriched: 5/13/2026, 4:07:14 PM
Last updated: 5/14/2026, 6:52:14 AM
Views: 2
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