CVE-2026-40631: CWE-552 Files or Directories Accessible to External Parties in F5 BIG-IP
An authenticated attacker with the Resource Administrator or Administrator role can modify configuration objects through iControl SOAP resulting in privilege escalation. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
AI Analysis
Technical Summary
CVE-2026-40631 is a vulnerability in F5 BIG-IP that allows an authenticated user with Resource Administrator or Administrator roles to escalate privileges by modifying configuration objects through the iControl SOAP interface. The issue is categorized under CWE-552, indicating improper exposure of files or directories to external parties. The vulnerability affects multiple BIG-IP versions (21.0.0, 17.5.0, 17.1.0, 16.1.0). The CVSS v3.1 base score is 8.7, reflecting high severity with network attack vector, low attack complexity, high privileges required, no user interaction, and impacts on confidentiality and integrity with scope change. No official patch or remediation guidance is currently available, and no exploits are known in the wild. The vulnerability is not applicable to cloud-hosted services.
Potential Impact
An attacker with authenticated access and elevated roles (Resource Administrator or Administrator) can leverage this vulnerability to escalate privileges by modifying configuration objects via iControl SOAP. This could lead to significant confidentiality and integrity impacts on the affected BIG-IP system. There is no indication of availability impact. No known active exploitation has been reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or remediation level is provided, organizations should monitor F5's advisories for updates. Until a patch is available, restrict administrative access to trusted personnel only and consider limiting network access to the iControl SOAP interface to reduce risk.
CVE-2026-40631: CWE-552 Files or Directories Accessible to External Parties in F5 BIG-IP
Description
An authenticated attacker with the Resource Administrator or Administrator role can modify configuration objects through iControl SOAP resulting in privilege escalation. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-40631 is a vulnerability in F5 BIG-IP that allows an authenticated user with Resource Administrator or Administrator roles to escalate privileges by modifying configuration objects through the iControl SOAP interface. The issue is categorized under CWE-552, indicating improper exposure of files or directories to external parties. The vulnerability affects multiple BIG-IP versions (21.0.0, 17.5.0, 17.1.0, 16.1.0). The CVSS v3.1 base score is 8.7, reflecting high severity with network attack vector, low attack complexity, high privileges required, no user interaction, and impacts on confidentiality and integrity with scope change. No official patch or remediation guidance is currently available, and no exploits are known in the wild. The vulnerability is not applicable to cloud-hosted services.
Potential Impact
An attacker with authenticated access and elevated roles (Resource Administrator or Administrator) can leverage this vulnerability to escalate privileges by modifying configuration objects via iControl SOAP. This could lead to significant confidentiality and integrity impacts on the affected BIG-IP system. There is no indication of availability impact. No known active exploitation has been reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or remediation level is provided, organizations should monitor F5's advisories for updates. Until a patch is available, restrict administrative access to trusted personnel only and consider limiting network access to the iControl SOAP interface to reduce risk.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- f5
- Date Reserved
- 2026-04-30T23:04:10.890Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a04970dcbff5d8610dff5a0
Added to database: 5/13/2026, 3:21:49 PM
Last enriched: 5/13/2026, 3:54:09 PM
Last updated: 5/14/2026, 5:57:22 AM
Views: 3
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