CVE-2021-41379
Act now ● On CISA KEV — actively exploited used in ransomware
Actively exploited — on the CISA KEV list.
CVSS base
5.5
MEDIUM
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS — probability of exploitation (30 days)
19.5%
97.3th percentile
CISA KEV
Listed
Added 2022-03-03 · patch by 2022-03-17
Weakness / dates
CWE-59
Published 2021-11-10 · modified 2026-08-19
CVSS breakdown
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
| Attack Vector | L | Local |
| Attack Complexity | L | Low |
| Privileges Required | L | Low |
| User Interaction | N | None |
| Scope | U | Unchanged |
| Confidentiality | N | None |
| Integrity | N | None |
| Availability | H | High |
Timeline
- 2021-11-10 — Published (NVD)
- 2022-03-03 — Added to CISA KEV (actively exploited)
- 2022-03-17 — CISA patch-by deadline
- 2026-08-19 — Last modified (NVD)
Description
Windows Installer Elevation of Privilege Vulnerability