Out-of-bounds read in PUPnP - #VU164475
Published: November 10, 2026
Vulnerability identifier: #VU164475
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 a remote attacker on the local network to cause a denial of service by crashing a UPnP control-point process.
The vulnerability exists due to an out-of-bounds read caused by improper null termination in PUPnP's http_Download() when processing chunked XML responses. A remote attacker on the local network can serve a chunked response with an extra CRLF after the terminating chunk from a URL downloaded through UpnpDownloadXmlDoc() to make the XML parser read beyond the allocated buffer and potentially crash the process.
Affected software
PUPnP
Remediation
Install security update from vendor's website.
PUPnP - update to 22.2.2