Denial of Service Vulnerability in Free5GC SMF by Free5GC
CVE-2026-1683

6.9MEDIUM

Key Information:

Vendor

Free5gc

Status
Smf
Vendor
CVE Published:
30 January 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-1683?

A denial of service vulnerability exists in the Free5GC SMF component, specifically within the HandlePfcpSessionReportRequest function located in the internal/pfcp/handler/handler.go file. This vulnerability allows an attacker to disrupt service through remote exploitation. The nature of the vulnerability makes it imperative for users to apply the necessary patches to mitigate potential disruptions in service. The exploit has been disclosed publicly, underscoring the urgency for affected organizations to take immediate action to protect their systems.

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)

SMF 4.0

SMF 4.1.0

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-2026-1683 - Proof of Concept

References

https://vuldb.com/?id.343476
vdb-entrytechnical-description
https://vuldb.com/?ctiid.343476
signaturepermissions-required
https://vuldb.com/?submit.739653
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

ZiyuLin (VulDB User)
JSON
.