Is CVE-2026-27642 actively exploited?

A proof-of-concept exploit is publicly available for CVE-2026-27642, but active exploitation has not been confirmed.

Can CVE-2026-27642 be exploited remotely?

Yes. CVE-2026-27642 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-27642?

CVE-2026-27642 has a CVSS score of 7.5 (HIGH) and an EPSS exploitation probability of 0.05%.

HOME VULNERABILITIESCVE-2026-27642

HIGHPOC

CVE-2026-27642

CWE-20Published: February 24, 2026· Updated: Feb 25, 2026

7.5

CVSS v3.1

EPSS:0.23%probability of exploitation in 30 daysPercentile:45.1th

Official 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, remote attackers can inject control characters (e.g., %00) into the supi parameter, triggering internal URL parsing errors (net/url: invalid control character). This exposes system-level error details and can be used for service fingerprinting. All deployments of free5GC using the UDM Nudm_UEAU service may be affected. free5gc/udm pull request 75 contains a fix for the issue. No direct workaround is available at the application level. Applying the official patch is recommended.

NVD Source

Technical Analysis

CVE-2026-27642 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 7.5.

A proof-of-concept (PoC) exploit exists for CVE-2026-27642. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.