How severe is CVE-2021-29462?

CVE-2021-29462 has a CVSS 3.x base score of 7.6, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability low.

Is CVE-2021-29462 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-29462?

CVE-2021-29462 affects Pupnp Project Pupnp. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-29462?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-29462 published?

CVE-2021-29462 was published on 2021-04-20 and last updated on 2026-06-17.

CVE-2021-29462

CVE-2021-29462 is a high-severity vulnerability in Pupnp Project Pupnp with a CVSS 3.x base score of 7.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-345.

Key facts

Severity: High (CVSS 3.x base score 7.6)
CVSS v2: 7.5
EPSS exploit prediction: 1% (46th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-345
Affected product: Pupnp Project Pupnp
Published: 2021-04-20
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2021-29462?: CVE-2021-29462 has a CVSS 3.x base score of 7.6, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability low.
Is CVE-2021-29462 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-29462?: CVE-2021-29462 affects Pupnp Project Pupnp. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-29462?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-29462 published?: CVE-2021-29462 was published on 2021-04-20 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:pupnp_project:pupnp:*:*:*:*:*:*:*:*

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