Out-of-bounds read in PUPnP - #VU159575
Published: November 6, 2026
Vulnerability identifier: #VU159575
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-125
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows an unauthenticated adjacent-network attacker to crash a host process embedding PUPnP, denying service.
The vulnerability exists due to incorrect buffer sizing when PUPnP copies GENA subscription callback URLs containing embedded NUL bytes. An unauthenticated adjacent-network attacker can send a crafted SUBSCRIBE request to the device's reachable HTTP port, triggering a heap out-of-bounds read when the application accepts the subscription and sends an event to a callback IP permitted by its delivery policy.
Affected software
PUPnP
Remediation
Install security update from vendor's website.
PUPnP - update to 22.1.9