CVE-2021-31718

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-04-25 · updated 2026-06-17
Weakness: CWE-346

Description

The server in npupnp before 4.1.4 is affected by DNS rebinding in the embedded web server (including UPnP SOAP and GENA endpoints), leading to remote code execution.

Affected products

Npupnp Project Npupnp: before 4.1.4 — fixed in 4.1.4

How to fix

Upgrade to a fixed version: Npupnp Project Npupnp 4.1.4. Check the vendor advisory for mitigations.

References

http://www.openwall.com/lists/oss-security/2021/04/25/2
https://framagit.org/medoc92/npupnp
https://www.lesbonscomptes.com/upmpdcli/npupnp-doc/libnpupnp.html
http://www.openwall.com/lists/oss-security/2021/04/25/2
https://framagit.org/medoc92/npupnp
https://www.lesbonscomptes.com/upmpdcli/npupnp-doc/libnpupnp.html

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