CVE-2021-23977

medium
Published — · Modified —
CVSS v3
CVSS v2
VIR risk
5.5

Description

Firefox for Android suffered from a time-of-check-time-of-use vulnerability that allowed a malicious application to read sensitive data from application directories. Note: This issue is only affected Firefox for Android. Other operating systems are unaffected. This vulnerability affects Firefox < 86.

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-2021-23977

vendor Authored 2026-05-27

Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2021-23977.html

OS impact

OSVersionStatusFixed in
arch archfixed86.0-1
suse slesaffected
debian debiansidfixed0

References

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