CVE-2026-2521

Name: CVE-2026-2521
Creator: NVD / NIST
Published: 2026-02-15T23:16:05.803+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.68%

Last modified Jun 17, 2026

CVE-2026-2521 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. A weakness has been identified in Open5GS up to 2.7.6. This issue affects the function sgwc_s5c_handle_create_session_response of the component SGW-C. EPSS estimates a 0.68% chance of exploitation in the next 30 days.

Description

A weakness has been identified in Open5GS up to 2.7.6. This issue affects the function sgwc_s5c_handle_create_session_response of the component SGW-C. Executing a manipulation can lead to memory corruption. The attack may be performed from remote. The exploit has been made available to the public and could be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.

Metrics

CVSS 3.1

9.8/10

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

0.68%

47.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-119

Affected Software

Vendor	Product	Versions
Open5gs	Open5gs	<= 2.7.6

References

https://github.com/open5gs/open5gs/Product
https://github.com/open5gs/open5gs/issues/4282Exploit, Issue Tracking, Vendor Advisory
https://github.com/open5gs/open5gs/issues/4282#issue-3807902188Exploit, Issue Tracking, Vendor Advisory
https://vuldb.com/?ctiid.346109Permissions Required, VDB Entry
https://vuldb.com/?id.346109Third Party Advisory, VDB Entry
https://vuldb.com/?submit.738334Third Party Advisory, VDB Entry

Timeline

Published: Feb 15, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-2521?

How severe is CVE-2026-2521?

CVE-2026-2521 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.68% probability of exploitation in the next 30 days.

How do I fix CVE-2026-2521?

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-2026-2521?

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

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Source: NVD / NIST