Information disclosure via leaked parsing errors
Published Feb 23, 2026 · Updated Feb 23, 2026
Improper input validation in free5GC UDM 1.4.1 and earlier allows remote attackers to disclose internal parsing errors via Nudm_UECM DELETE requests. The UECM deregistration handler passes the pduSessionId path value to strconv.ParseInt without first enforcing numeric syntax and the signed 32-bit range, then returns the resulting error text in a 500 response. Network access to the UDM service is sufficient; malformed identifiers expose implementation details for fingerprinting without altering data or interrupting the service.
Summary
What happened
Improper input validation in free5GC UDM 1.4.1 and earlier allows remote attackers to disclose internal parsing errors via Nudm_UECM DELETE requests. The UECM deregistration handler passes the pduSessionId path value to strconv.ParseInt without first enforcing numeric syntax and the signed 32-bit range, then returns the resulting error text in a 500 response. Network access to the UDM service is sufficient; malformed identifiers expose implementation details for fingerprinting without altering data or interrupting the service.
The record
- CVE
- CVE-2025-69250
- Published
- Feb 23, 2026
- Updated
- Feb 23, 2026
- Vendor
- free5GC
- Product
- Unified Data Management (UDM)
- Classifications
- CWE-754, CWE-20, T1595.002
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Feb 23, 2026CVE publishedPublication date reported by the CVE source.
- Feb 23, 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.
- Affected versionversion=<= 1.4.1
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Weakness, pattern, technique
Public exploit references
- Nudm_UECM malformed pduSessionId reproducerproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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