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CVE-2021-28681

19
FAUCET Score

CVE-2021-28681 describes a vulnerability in Pion WebRTC versions prior to 3.0.15 where the DTLS connection was not properly terminated upon certificate verification failure, allowing continued use of the PeerConnection despite the failed state. This medium-severity vulnerability (CVSS 5.3) has a network attack vector with low complexity, requiring no user interaction, and could lead to a loss of integrity (I:L). There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 3.0.15CPE matchmatch criteria
cpe:2.3:a:webrtc_project:webrtc:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.3MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.68%
Probability of exploitation in next 30 days
EPSS Percentile
48.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0068 is in the 31st percentile among its peer group of 23,723 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
gopatch availablevia ghsa
Product: github.com/pion/webrtc/v3Fixed in: 3.0.15

Vendor Advisories (1)

goGHSA-74xm-qj29-cq8pmedium

In github.com/pion/webrtc, failed DTLS certificate verification doesn't stop data channel communication

May 25, 2021

References

github.com / pion/webrtc/issues/1708
ExploitPatchThird Party Advisory
github.com / pion/webrtc/security/advisories/GHSA-74xm-qj29-cq8p
Third Party Advisory