How severe is CVE-2026-1683?

CVE-2026-1683 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-2026-1683 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-1683?

CVE-2026-1683 affects Free5gc. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-1683?

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

Does CVE-2026-1683 have an EU (EUVD) identifier?

Yes. CVE-2026-1683 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-5031.

When was CVE-2026-1683 published?

CVE-2026-1683 was published on 2026-01-30 and last updated on 2026-06-17.

CVE-2026-1683

CVE-2026-1683 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-404.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 5.0
CVSS v4: 5.5
EPSS exploit prediction: 1% (46th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-5031
Weakness: CWE-404
Affected product: Free5gc
Published: 2026-01-30
Last modified: 2026-06-17

Description

A vulnerability has been found in Free5GC SMF up to 4.1.0. Affected by this vulnerability is the function HandlePfcpSessionReportRequest of the file internal/pfcp/handler/handler.go of the component PFCP. The manipulation leads to denial of service. Remote exploitation of the attack is possible. The exploit has been disclosed to the public and may be used. To fix this issue, it is recommended to deploy a patch.

Frequently asked questions

What is CVE-2026-1683?: A vulnerability has been found in Free5GC SMF up to 4.1.0. Affected by this vulnerability is the function HandlePfcpSessionReportRequest of the file internal/pfcp/handler/handler.go of the component PFCP. The manipulation leads to denial of service. Remote exploitation of the attack is possible. The exploit has been disclosed to the public and may be used. To fix this issue, it is recommended to deploy a patch.
How severe is CVE-2026-1683?: CVE-2026-1683 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-2026-1683 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-1683?: CVE-2026-1683 affects Free5gc. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-1683?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-1683 have an EU (EUVD) identifier?: Yes. CVE-2026-1683 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-5031.
When was CVE-2026-1683 published?: CVE-2026-1683 was published on 2026-01-30 and last updated on 2026-06-17.

References

Affected products (1)

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

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