CVE-2025-69250CWE-20CWE-754

free5GC has Improper Error Handling in UDM, Leading to Information Exposure

Medium · published February 23, 2026

CVSS v4.0
6.6
EPSS
0%
Percentile
39.1
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
6.6 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U
EPSS
0.00463 · 39.1th percentile
Weaknesses
CWE-20 · Improper Input Validation; CWE-754 · Improper Check for Unusual or Exceptional Conditions
Published
2026-02-23T23:45Z
EPSS history
Timeline
  • 23 FEB 23:45Z
    free5GC has Improper Error Handling in UDM, Leading to Information Exposure
    cvelistv5