Infinite loop in PUPnP - #VU151943
Published: September 24, 2026
Vulnerability identifier: #VU151943
CSH Severity: Medium
CVSS v4: 7.1 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-835
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to an infinite loop in gena_subscribe() when processing a granted TIMEOUT: Second-0 subscription response. A remote attacker can operate a rogue UPnP device that grants a zero-second subscription timeout to cause a denial of service.
Exploitation requires the application to discover the attacker's device on the local network.
Affected software
PUPnP
Remediation
Install security update from vendor's website.
PUPnP - update to 22.1.3