High severity · published Feb 23, 2026
CVE-2025-69250
free5GC has Improper Error Handling in UDM, Leading to Information Exposure
7.5
CVSS
0.5%
EPSS
No
On KEV
Description
free5gc UDM provides Unified Data Management (UDM) for free5GC, an open-source project for 5th generation (5G) mobile core networks. In versions up to and including 1.4.1, the service reliably leaks detailed internal error messages (e.g., strconv.ParseInt parsing errors) to remote clients when processing invalid pduSessionId inputs. This exposes implementation details and can be used for service fingerprinting. All deployments of free5GC using the UDM Nudm_UECM DELETE service may be vulnerable. free5gc/udm pull request 76 contains a fix for the issue. No direct workaround is available at the application level. Applying the official patch is recommended.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 40% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
UD
udm · free5gc
<= 1.4.1 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-69250
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-69250
Exploit
https://github.com/free5gc/free5gc/issues/750
Patch
https://github.com/free5gc/free5gc/security/advisories/GHSA-6w77-5pqh-83rm
Patch
https://github.com/free5gc/udm/commit/504b14458d156558b3c0ade7107b86b3d5e72998
Issue Tracking
https://github.com/free5gc/udm/pull/76
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