Denial of Service Vulnerability in Open5GS by Open5GS
CVE-2025-15539

6.9MEDIUM

Key Information:

Vendor

Open5GS

Status
Open5gs
Vendor
CVE Published:
18 January 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-15539?

A vulnerability exists in Open5GS versions up to 2.7.6, specifically in the functionality of sgwc_s11_handle_downlink_data_notification_ack within the sgwc component. This flaw allows for a denial of service attack that can be executed remotely, potentially taking systems offline. The vulnerability has been publicly disclosed, making it crucial for users of affected versions to apply the recommended patch, b4707272c1caf6a7d4dca905694ea55557a0545f, to safeguard against potential exploitation.

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-2025-15539 - Proof of Concept

References

https://vuldb.com/?id.341732
vdb-entrytechnical-description
https://vuldb.com/?ctiid.341732
signaturepermissions-required
https://vuldb.com/?submit.735339
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

FrankyLin (VulDB User)
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