How severe is CVE-2026-1976?

CVE-2026-1976 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 none, integrity none, and availability low.

Is CVE-2026-1976 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-1976?

CVE-2026-1976 affects Free5gc. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-1976?

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

Does CVE-2026-1976 have an EU (EUVD) identifier?

Yes. CVE-2026-1976 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-5602.

When was CVE-2026-1976 published?

CVE-2026-1976 was published on 2026-02-06 and last updated on 2026-06-17.

CVE-2026-1976

CVE-2026-1976 is a medium-severity vulnerability in Free5gc 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-476.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 5.0
CVSS v4: 5.5
EPSS exploit prediction: 1% (41st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-5602
Weakness: CWE-476
Affected product: Free5gc
Published: 2026-02-06
Last modified: 2026-06-17

Description

A weakness has been identified in Free5GC up to 4.1.0. Affected is the function SessionDeletionResponse of the component SMF. This manipulation causes null pointer dereference. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be used for attacks. It is suggested to install a patch to address this issue.

Frequently asked questions

What is CVE-2026-1976?: A weakness has been identified in Free5GC up to 4.1.0. Affected is the function SessionDeletionResponse of the component SMF. This manipulation causes null pointer dereference. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be used for attacks. It is suggested to install a patch to address this issue.
How severe is CVE-2026-1976?: CVE-2026-1976 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 none, integrity none, and availability low.
Is CVE-2026-1976 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-1976?: CVE-2026-1976 affects Free5gc. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-1976?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-1976 have an EU (EUVD) identifier?: Yes. CVE-2026-1976 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-5602.
When was CVE-2026-1976 published?: CVE-2026-1976 was published on 2026-02-06 and last updated on 2026-06-17.

References

Affected products (1)

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

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