Denial of Service Vulnerability in Open5GS SGWC Component
CVE-2026-1521

6.9MEDIUM

Key Information:

Vendor

Open5GS

Status
Open5gs
Vendor
CVE Published:
28 January 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-1521?

A security flaw in Open5GS, specifically in the SGWC component, allows remote attackers to trigger a denial of service by exploiting the function sgwc_s5c_handle_bearer_resource_failure_indication within the source file src/sgwc/s5c-handler.c. This vulnerability can lead to service disruptions for users. It is crucial to apply the provided patch (commit 69b53add90a9479d7960b822fc60601d659c328b) to mitigate the risk posed by this publicly disclosed exploit.

Human OS v1.0:
Ageing Is an Unpatched Zero-Day Vulnerability.

Remediate biological technical debt. Prime Ageing uses 95% high-purity SIRT6 activation to maintain genomic integrity and bolster systemic resilience.

Deploy the Patch

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-2026-1521 - Proof of Concept

References

https://vuldb.com/?id.343192
vdb-entrytechnical-description
https://vuldb.com/?ctiid.343192
signaturepermissions-required
https://vuldb.com/?submit.738370
third-party-advisory

CVSS V4

Score:
6.9
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

LinZiyu (VulDB User)
JSON
.