CVE-2025-5520

Name: CVE-2025-5520
Creator: NVD / NIST
Published: 2025-06-03T18:15:27.257+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.9/10EPSS 0.74%

Last modified Jun 17, 2026

CVE-2025-5520 is a medium-severity vulnerability rated 6.9/10 on the CVSS scale. A vulnerability was found in Open5GS up to 2.7.3. It has been classified as problematic. EPSS estimates a 0.74% chance of exploitation in the next 30 days.

Description

A vulnerability was found in Open5GS up to 2.7.3. It has been classified as problematic. Affected is the function gmm_state_authentication/emm_state_authentication of the component AMF/MME. The manipulation leads to reachable assertion. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. The name of the patch is 9f5d133657850e6167231527514ee1364d37a884. It is recommended to apply a patch to fix this issue. This is a different issue than CVE-2025-1893.

Metrics

CVSS 3.1

5.3/10

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

CVSS 4.0

6.9/10

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:X/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

0.74%

50.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-617

Affected Software

Vendor	Product	Versions
Open5gs	Open5gs	>= 2.7.0, <= 2.7.3

References

https://github.com/open5gs/open5gs/commit/9f5d133657850e6167231527514ee1364d37a884Patch
https://github.com/open5gs/open5gs/issues/3910Exploit, Issue Tracking
https://github.com/open5gs/open5gs/issues/3910#issuecomment-2926719317Exploit, Issue Tracking
https://github.com/user-attachments/files/20362243/Problematic.handover.required.process.zipExploit
https://vuldb.com/?ctiid.310956Permissions Required, VDB Entry
https://vuldb.com/?id.310956Third Party Advisory, VDB Entry
https://vuldb.com/?submit.582269Third Party Advisory, VDB Entry
https://github.com/open5gs/open5gs/issues/3910Exploit, Issue Tracking

Timeline

Published: Jun 3, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-5520?

How severe is CVE-2025-5520?

CVE-2025-5520 has a CVSS score of 6.9/10 (MEDIUM severity). The EPSS model estimates a 0.74% probability of exploitation in the next 30 days.

How do I fix CVE-2025-5520?

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-2025-5520?

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

Scan your code now

Source: NVD / NIST