CVE-2023-21707 in the critical feed json
Microsoft Exchange Server Remote Code Execution Vulnerability
published 2023-02-14 3 y ago modified 2026-08-19 2 mo ago also EUVD-2023-25874
- cvss
- 8.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 79.6%
- EPSS 79.6% chance of exploitation in 30 days, percentile 99.6%
- public exploits
- 0
- none known
Summary
Microsoft Exchange Server Remote Code Execution Vulnerability
Patch / fix
- Microsoft Microsoft Exchange Server 2013 Cumulative Update 23 15.00.1497.048
- Microsoft Microsoft Exchange Server 2016 Cumulative Update 23 15.01.2507.023
- Microsoft Microsoft Exchange Server 2019 Cumulative Update 11 15.02.0986.042
- Microsoft Microsoft Exchange Server 2019 Cumulative Update 12 15.02.1118.026
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 20 mo ago
Exploit prediction
79.58% chance of exploitation in the next 30 days, higher than 99.6% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C |
| CNA | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected products
- Microsoft Microsoft Exchange Server 2013 Cumulative Update 23
- Microsoft Microsoft Exchange Server 2016 Cumulative Update 23
- Microsoft Microsoft Exchange Server 2019 Cumulative Update 11
- Microsoft Microsoft Exchange Server 2019 Cumulative Update 12
Classification
- Weakness
-
- CWE-502 Deserialization of Untrusted Data
- Technology feeds
References
-
msrc.microsoft.com
/update-guide/vulnerability/CVE-2023-21707
vendor-advisory, patch
Sources
- CVE List CVE-2023-21707
- NVD CVE-2023-21707
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.