What is CVE-2021-29462?

CVE-2021-29462 is a high-severity vulnerability in Pupnp, classified under Improper Input Validation. CVSS score: 7.6/10. Published 2021-04-20.

How severe is CVE-2021-29462?

High severity. CVSS v3 base score is 7.6 out of 10.

Improper input validation in Pupnp

CVE-2021-29462

The Portable SDK for UPnP Devices is an SDK for development of UPnP device and control point applications. The server part of pupnp (libupnp) appears to be vulnerable to DNS rebinding attacks because it does not check the value of the `Host` header. This can be mitigated by using DNS revolvers which block DNS-rebinding attacks. The vulnerability is fixed in version 1.14.6 and later.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2021-04-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:L.

EPSS exploit prediction

EPSS: 0.006 (48.1th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 48.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Pupnp — versions < 1.14.6
Pupnp Project

Weakness classification (CWE)

References

github.com/pupnp/pupnp/security/advisories/GHSA-6hqq-w3jq-9fhg (Third Party Advisory)
www.openwall.com/lists/oss-security/2021/04/20/4 (mailing-list, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2021-29462?: CVE-2021-29462 is a high-severity vulnerability in Pupnp, classified under Improper Input Validation. CVSS score: 7.6/10. Published 2021-04-20.
How severe is CVE-2021-29462?: High severity. CVSS v3 base score is 7.6 out of 10.