CVE-2021-23982

high
Published — · Modified —
CVSS v3
CVSS v2
VIR risk
8.0

Description

Using techniques that built on the slipstream research, a malicious webpage could have scanned both an internal network's hosts as well as services running on the user's local machine utilizing WebRTC connections. This vulnerability affects Firefox ESR < 78.9, Firefox < 87, and Thunderbird < 78.9.

Predictions

Exploit likelihood
20%
Patch ETA

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2021-23982

vendor Authored 2026-05-27

Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2021-23982.html

OS impact

OSVersionStatusFixed in
arch archfixed78.9.0-1
suse slesaffected
debian debiansidfixed87.0-1
debian debianbookwormfixed78.9.0esr-1
debian debianbullseyefixed78.9.0esr-1
debian debianforkyfixed78.9.0esr-1
debian debiantrixiefixed78.9.0esr-1

References

Verify integrity in audit chain (admin only). AS-IS.