CVE-2026-1973

Name: CVE-2026-1973
Creator: NVD / NIST
Published: 2026-02-06T02:16:05.62+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.53%

Last modified Jun 17, 2026

CVE-2026-1973 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. A vulnerability was determined in Free5GC up to 4.1.0. The impacted element is the function establishPfcpSession of the component SMF. EPSS estimates a 0.53% chance of exploitation in the next 30 days.

Description

A vulnerability was determined in Free5GC up to 4.1.0. The impacted element is the function establishPfcpSession of the component SMF. Executing a manipulation can lead to null pointer dereference. The attack may be launched remotely. The exploit has been publicly disclosed and may be utilized. It is best practice to apply a patch to resolve this issue.

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

0.53%

40.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Free5gc	Free5gc	<= 4.1.0

References

https://github.com/free5gc/free5gc/Product
https://github.com/free5gc/free5gc/issues/815Exploit, Issue Tracking, Vendor Advisory
https://github.com/free5gc/free5gc/issues/815#issue-3832032062Exploit, Issue Tracking, Vendor Advisory
https://github.com/free5gc/smf/pull/189Issue Tracking
https://vuldb.com/?ctiid.344495Permissions Required, VDB Entry
https://vuldb.com/?id.344495Third Party Advisory, VDB Entry
https://vuldb.com/?submit.743236Exploit, Third Party Advisory, VDB Entry

Timeline

Published: Feb 6, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-1973?

How severe is CVE-2026-1973?

CVE-2026-1973 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.53% probability of exploitation in the next 30 days.

How do I fix CVE-2026-1973?

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-2026-1973?

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

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Source: NVD / NIST