CVE-2021-26854
Medium
Elevated severity or exploit probability.
CVSS base
6.6
MEDIUM
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
EPSS — probability of exploitation (30 days)
23.6%
97.7th percentile
CISA KEV
Not listed
Weakness / dates
—
Published 2021-03-03 · modified 2026-08-19
CVSS breakdown
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
| Attack Vector | N | Network |
| Attack Complexity | H | High |
| Privileges Required | H | High |
| User Interaction | N | None |
| Scope | U | Unchanged |
| Confidentiality | H | High |
| Integrity | H | High |
| Availability | H | High |
Timeline
- 2021-03-03 — Published (NVD)
- 2026-08-19 — Last modified (NVD)
Description
Microsoft Exchange Server Remote Code Execution Vulnerability