CVE-2025-15687

Open5GS SMF Diameter Gx Credit-Control-Answer smf_gx_cca_cb denial of service

MEDIUM
4.3
CVSS Score
Published: August 12, 2026 at 02:45 AM UTC
Updated: September 29, 2026 at 11:10 AM UTC
1 product affected across 1 vendorOpen5GS

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Severity
MEDIUM4.3
Exploit prediction
EPSS 0.6%
SSVC
PoC

Description

A security flaw has been discovered in Open5GS up to 2.7.6. Impacted is the function smf_gx_cca_cb of the component SMF Diameter Gx Credit-Control-Answer Handler. The manipulation results in denial of service. The attack can be launched remotely. The exploit has been released to the public and may be used for attacks. Upgrading to version 2.7.7 is recommended to address this issue. The patch is identified as f23d7a5e959acd8f37b925dc29b85f26b7d391cb. Upgrading the affected component is advised.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Vendor states this is fixed in 2.7.7 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (10)

VDB EntryTechnical Description
Source: cverecord
https://vuldb.com/vuln/387283
SignaturePermissions Required
Source: cverecord
https://vuldb.com/vuln/387283/cti
Third Party Advisory
Source: cverecord
https://vuldb.com/cve/CVE-2025-15687
Third Party Advisory
Source: cverecord
https://vuldb.com/submit/867119
Issue Tracking
Source: cverecord
https://github.com/open5gs/open5gs/issues/4027
Issue TrackingPatch
Source: cverecord
https://github.com/open5gs/open5gs/pull/4034

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.3MEDIUMVulDB
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-404

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