CVE-2021-31196
Act now ● On CISA KEV — actively exploited
Actively exploited — on the CISA KEV list.
CVSS base
7.2
HIGH
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
EPSS — probability of exploitation (30 days)
54.1%
99.0th percentile
CISA KEV
Listed
Added 2024-08-21 · patch by 2024-09-11
Weakness / dates
—
Published 2021-07-14 · modified 2026-08-10
CVSS breakdown
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
| Attack Vector | N | Network |
| Attack Complexity | L | Low |
| Privileges Required | H | High |
| User Interaction | N | None |
| Scope | U | Unchanged |
| Confidentiality | H | High |
| Integrity | H | High |
| Availability | H | High |
Timeline
- 2021-07-14 — Published (NVD)
- 2024-08-21 — Added to CISA KEV (actively exploited)
- 2024-09-11 — CISA patch-by deadline
- 2026-08-10 — Last modified (NVD)
Description
Microsoft Exchange Server Remote Code Execution Vulnerability