CVE-2026-1683

Name: CVE-2026-1683
Creator: NVD / NIST
Published: 2026-01-30T14:16:07.323+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.64%

Last modified Jun 17, 2026

CVE-2026-1683 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. 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. EPSS estimates a 0.64% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS 4.0

5.5/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.64%

46.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-404

Affected Software

Vendor	Product	Versions
Free5gc	Free5gc	<= 4.1.0

References

https://github.com/free5gc/free5gc/issues/804Exploit, Issue Tracking
https://github.com/free5gc/free5gc/issues/804#issue-3816086696Exploit, Issue Tracking, Vendor Advisory
https://github.com/free5gc/smf/
https://github.com/free5gc/smf/pull/188Issue Tracking
https://vuldb.com/?ctiid.343476Permissions Required, VDB Entry
https://vuldb.com/?id.343476Third Party Advisory, VDB Entry
https://vuldb.com/?submit.739653Third Party Advisory, VDB Entry
https://vuldb.com/?submit.739654Third Party Advisory, VDB Entry

Timeline

Published: Jan 30, 2026
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2026-1683?

How severe is CVE-2026-1683?

CVE-2026-1683 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.64% probability of exploitation in the next 30 days.

How do I fix CVE-2026-1683?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-1683?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST