Vulnerability · Published Oct 14, 2026 · Assigned by VulnCheck
CVE-2026-110655miniupnpc through 2.3.3 Heap Out-of-Bounds Read via minixml parseatt
Low 3.1
In plain English
A low-severity out-of-bounds read in miniupnpc from miniupnp project. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 22% of all known vulnerabilities).
Severity (CVSS 3.1)3.1Low
Exploit odds (30 days)0.3%top 78.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
miniupnpc through 2.3.3 contains a one-byte heap out-of-bounds read vulnerability in the minixml parseatt function that allows malicious UPnP gateways to read past buffer bounds via crafted replies. Attackers on the local network can spoof a gateway serving device descriptions or SOAP responses ending in '=' to crash the client.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | miniupnpc | no fix listed | DEBIAN-CVE-2026-110655 |
| Debian:13 | miniupnpc | no fix listed | DEBIAN-CVE-2026-110655 |
| Debian:14 | miniupnpc | no fix listed | DEBIAN-CVE-2026-110655 |
| Ubuntu:22.04:LTS | miniupnpc | no fix listed | UBUNTU-CVE-2026-110655 |
| Ubuntu:24.04:LTS | miniupnpc | no fix listed | UBUNTU-CVE-2026-110655 |
| Ubuntu:26.04:LTS | miniupnpc | no fix listed | UBUNTU-CVE-2026-110655 |
| Ubuntu:26.10 | miniupnpc | no fix listed | UBUNTU-CVE-2026-110655 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| miniupnp project | miniupnpc | 0 – through 2.3.3 |
Weakness: CWE-125 · Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
References
- https://hackmd.io/@haind-pwn/miniupnpc-minixml-oob-read technical-description, exploit
- https://github.com/miniupnp/miniupnp/blob/bf4215a7574f88aa55859db9db00e3ae58cf42d6/miniupnpc/src/minixml.c#L61 technical-description
- https://github.com/miniupnp/miniupnp/commit/3cfb4fb78d5ac04ed0dadc8dd842fc9e448916db patch
- https://github.com/miniupnp/miniupnp product
- VulnCheck Advisory: miniupnpc through 2.3.3 Heap Out-of-Bounds Read via minixml parseatt third-party-advisory