How severe is CVE-2025-69251?

CVE-2025-69251 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2025-69251 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-69251?

CVE-2025-69251 affects Free5gc Udm. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-69251?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-69251 have an EU (EUVD) identifier?

Yes. CVE-2025-69251 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-207563.

When was CVE-2025-69251 published?

CVE-2025-69251 was published on 2026-02-24 and last updated on 2026-06-17.

CVE-2025-69251

CVE-2025-69251 is a medium-severity vulnerability in Free5gc Udm with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v4: 6.6
EPSS exploit prediction: 0% (37th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-207563
Weakness: CWE-20
Affected product: Free5gc Udm
Published: 2026-02-24
Last modified: 2026-06-17

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 ueId parameter, triggering internal URL parsing errors (net/url: invalid control character). This exposes system implementation details and can aid in service fingerprinting. All deployments of free5GC using the UDM Nudm_UECM service may be affected. 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.

Frequently asked questions

What is CVE-2025-69251?: 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 ueId parameter, triggering internal URL parsing errors (net/url: invalid control character). This exposes system implementation details and can aid in service fingerprinting. All deployments of free5GC using the UDM Nudm_UECM service may be affected. 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.
How severe is CVE-2025-69251?: CVE-2025-69251 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2025-69251 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-69251?: CVE-2025-69251 affects Free5gc Udm. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-69251?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-69251 have an EU (EUVD) identifier?: Yes. CVE-2025-69251 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-207563.
When was CVE-2025-69251 published?: CVE-2025-69251 was published on 2026-02-24 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:free5gc:udm:*:*:*:*:*:go:*:*

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