CVE-2021-28681

Name: CVE-2021-28681
Creator: NVD / NIST
Published: 2021-03-18T04:15:14.617+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 0.68%

Last modified Jun 17, 2026

CVE-2021-28681 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. Pion WebRTC before 3.0.15 didn't properly tear down the DTLS Connection when certificate verification failed. The PeerConnectionState was set to failed, but a user could ignore that and continue to use the PeerConnection. EPSS estimates a 0.68% chance of exploitation in the next 30 days.

Description

Pion WebRTC before 3.0.15 didn't properly tear down the DTLS Connection when certificate verification failed. The PeerConnectionState was set to failed, but a user could ignore that and continue to use the PeerConnection. )A WebRTC implementation shouldn't allow the user to continue if verification has failed.)

Metrics

CVSS 3.1

5.3/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS Probability

0.68%

47.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-863

Affected Software

Vendor	Product	Versions
Webrtc Project	Webrtc	< 3.0.15

References

https://github.com/pion/webrtc/issues/1708Exploit, Patch, Third Party Advisory
https://github.com/pion/webrtc/security/advisories/GHSA-74xm-qj29-cq8pThird Party Advisory
https://github.com/pion/webrtc/issues/1708Exploit, Patch, Third Party Advisory
https://github.com/pion/webrtc/security/advisories/GHSA-74xm-qj29-cq8pThird Party Advisory

Timeline

Published: Mar 18, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-28681?

How severe is CVE-2021-28681?

CVE-2021-28681 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 0.68% probability of exploitation in the next 30 days.

How do I fix CVE-2021-28681?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-28681?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST