CVE-2025-5520

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.82% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 54.5% of scored records. A rank, not a probability.

NVD base score

6.9 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Analyzed. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2025-06-03 18:00Z1 YR AGO

Last updated

2025-06-03 18:21Z1 YR AGO

Reserved

2025-06-03

Assigning CNA

VulDB

Record state

PUBLISHED

Severity

Medium (CVSS 6.9)

CNA CVSS vector

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

Weaknesses

• CWE-617Reachable AssertionBase

Data version

5.1

Document digest

a4963e708b20286d3220b19cb17efa3064a62b704a5d2523549e6f725ff2ce9a

• vuldb.comVDB-310956 | Open5GS AMF/MME emm_state_authentication assertionhttps://vuldb.com/?id.310956vdb-entrytechnical-description
• vuldb.comVDB-310956 | CTI Indicators (IOB, IOC, IOA)https://vuldb.com/?ctiid.310956signaturepermissions-required
• vuldb.comSubmit #582269 | Open5GS <=2.7.3 Reachable Assertionhttps://vuldb.com/?submit.582269third-party-advisory
• github.comhttps://github.com/open5gs/open5gs/issues/3910issue-tracking
• github.comhttps://github.com/open5gs/open5gs/issues/3910#issuecomment-2926719317issue-tracking
• github.comhttps://github.com/user-attachments/files/20362243/Problematic.handover.required.process.zipexploit
• github.comhttps://github.com/open5gs/open5gs/commit/9f5d133657850e6167231527514ee1364d37a884patch