Vulnerability Database

314,343

Total vulnerabilities in the database

CVE-2021-23977

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.

  • Published: Feb 26, 2021
  • Updated: Nov 16, 2025
  • CVE: CVE-2021-23977
  • Severity: Medium
  • Exploit:

CVSS v3:

  • Severity: Medium
  • Score: 5.3
  • AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N

CVSS v2:

  • Severity: Low
  • Score: 2.6
  • AV:N/AC:H/Au:N/C:P/I:N/A:N

CWEs:

Software From Fixed in
mozilla / firefox - 86.0