Memory Corruption Vulnerability in Open5GS SGW-C Component
CVE-2026-2521

6.9MEDIUM

Key Information:

Vendor

Open5GS

Status
Open5gs
Vendor
CVE Published:
15 February 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-2521?

A critical issue has been discovered in the Open5GS software, specifically within the SGW-C component's sgwc_s5c_handle_create_session_response function. This vulnerability allows for remote manipulation that may result in memory corruption, posing a significant security risk. The flaw affects Open5GS versions up to 2.7.6, and the exploit has been publicly shared, increasing the likelihood of targeted attacks. Despite early notification to the project maintainers regarding this vulnerability, no response has been documented.

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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-2026-2521 - Proof of Concept

References

https://vuldb.com/?id.346109
vdb-entrytechnical-description
https://vuldb.com/?ctiid.346109
signaturepermissions-required
https://vuldb.com/?submit.738334
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)
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