How severe is CVE-2025-65561?

CVE-2025-65561 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2025-65561 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-65561?

CVE-2025-65561 affects Free5gc. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-65561?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-65561 have an EU (EUVD) identifier?

Yes. CVE-2025-65561 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-204367.

When was CVE-2025-65561 published?

CVE-2025-65561 was published on 2025-12-18 and last updated on 2026-06-17.

CVE-2025-65561

CVE-2025-65561 is a high-severity vulnerability in Free5gc with a CVSS 3.x base score of 7.5. 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: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (29th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-204367
Weakness: CWE-20
Affected product: Free5gc
Published: 2025-12-18
Last modified: 2026-06-17

Description

An issue was discovered in function LocalNode.Sess in free5GC 4.1.0 allowing attackers to cause a denial of service or other unspecified impacts via crafted header Local SEID to the PFCP Session Modification Request.

Frequently asked questions

What is CVE-2025-65561?: An issue was discovered in function LocalNode.Sess in free5GC 4.1.0 allowing attackers to cause a denial of service or other unspecified impacts via crafted header Local SEID to the PFCP Session Modification Request.
How severe is CVE-2025-65561?: CVE-2025-65561 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2025-65561 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-65561?: CVE-2025-65561 affects Free5gc. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-65561?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-65561 have an EU (EUVD) identifier?: Yes. CVE-2025-65561 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-204367.
When was CVE-2025-65561 published?: CVE-2025-65561 was published on 2025-12-18 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:free5gc:free5gc:4.1.0:*:*:*:*:*:*:*

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