VDB
DEBIAN-CVE-2021-23987
DEBIAN-CVE-2021-23987
PUBLISHED
CVSS 8.800000190734863 HIGH
Mozilla developers and community members reported memory safety bugs present in Firefox 86 and Firefox ESR 78.8. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 78.9, Firefox < 87, and Thunderbird < 78.9.
Risk Scores
CVSS v3.1
8.800000190734863
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Debian:13 | firefox-esr | 0, 0, 0 |
| Debian:14 | thunderbird | 0, 0, 0 |
| Debian:11 | firefox-esr | 0, 0, 0 |
| Debian:11 | thunderbird | 0, 0, 0 |
| Debian:12 | thunderbird | 0, 0, 0 |
| Debian:14 | firefox-esr | 0, 0, 0 |
| Debian:13 | thunderbird | 0, 0, 0 |
| Debian:12 | firefox-esr | 0, 0, 0 |
Timeline
- Mar 31, 2021 CVE Published
- Apr 28, 2026 CVE Updated