Medium severity5.3NVD Advisory· Published Feb 26, 2021· Updated Jun 17, 2026
CVE-2021-23977
CVE-2021-23977
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
5cpe:2.3:a:mozilla:firefox:*:*:*:*:*:android:*:*+ 1 more
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:android:*:*range: <86.0
- (no CPE)range: < 86
- Range: <86
- osv-coords2 versionspkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/firefox-esr&distro=openSUSE%20Tumbleweed
< 92.0-1.2+ 1 more
- (no CPE)range: < 92.0-1.2
- (no CPE)range: < 128.5.1-1.1
Patches
Vulnerability mechanics
References
3- bugzilla.mozilla.org/show_bug.cginvdIssue TrackingPermissions RequiredVendor Advisory
- security.gentoo.org/glsa/202104-10nvdThird Party Advisory
- www.mozilla.org/security/advisories/mfsa2021-07/nvdRelease NotesVendor Advisory
News mentions
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