CVE-2023-21709
Medium
Elevated severity or exploit probability.
CVSS base
9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS — probability of exploitation (30 days)
2.0%
79.6th percentile
CISA KEV
Not listed
Weakness / dates
CWE-307
Published 2023-08-08 · modified 2026-08-10
CVSS breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
| Attack Vector | N | Network |
| Attack Complexity | L | Low |
| Privileges Required | N | None |
| User Interaction | N | None |
| Scope | U | Unchanged |
| Confidentiality | H | High |
| Integrity | H | High |
| Availability | H | High |
Timeline
- 2023-08-08 — Published (NVD)
- 2026-08-10 — Last modified (NVD)
Description
Microsoft Exchange Server Elevation of Privilege Vulnerability