Denial of Service in Open5GS HSS Service by Open5GS
CVE-2025-15686

5.3MEDIUM

Key Information:

Vendor

Open5GS

Status
Open5gs
Vendor
CVE Published:
12 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-15686?

A denial of service vulnerability has been identified in versions of Open5GS up to 2.7.6, specifically in the HSS Service's fd_msg_sess_get function. This vulnerability enables remote attackers to manipulate the Session-Id argument, potentially disrupting the service. The details of this exploit have become public, raising concerns about its implementation in the wild. Users of affected versions are advised to implement immediate updates and ensure robust security practices to mitigate potential risks.

Affected Version(s)

Open5GS 2.7.0

Open5GS 2.7.1

Open5GS 2.7.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2025-15686 - Proof of Concept

References

https://vuldb.com/vuln/387279
vdb-entrytechnical-description
https://vuldb.com/vuln/387279/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2025-15686
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

WeiYi (VulDB User)
VulDB CNA Team
.