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CVE-2023-21706
Microsoft Exchange Server Remote Code Execution Vulnerability
High8.8EPSS 4.1%
- Published
- Updated
- Reserved
- Assigned by
- microsoft
Description
Microsoft Exchange Server Remote Code Execution Vulnerability
Timeline
ID reserved
By microsoft
- 2 months later
· 2 months later
Published
- 4 years later
· 4 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| microsoftCNA (assigner) | 3.1 | High8.8 | 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 |
| NVDNVD · Modified | 3.1 | High8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 4.1% · top 9.3% of all CVEs (7 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.8.
Weakness
Affected products
Microsoft · Microsoft Exchange Server 2013 Cumulative Update 23
- affected 15.00.0 – < 15.00.1497.047
Microsoft · Microsoft Exchange Server 2016 Cumulative Update 23
- affected 15.01.0 – < 15.01.2507.021
Microsoft · Microsoft Exchange Server 2019 Cumulative Update 11
- affected 15.02.0 – < 15.02.0986.041
Microsoft · Microsoft Exchange Server 2019 Cumulative Update 12
- affected 15.02.0 – < 15.02.1118.025
References (1)
- Microsoft Exchange Server Remote Code Execution Vulnerability (opens in a new tab)vendor-advisorypatchx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2023-21706)Record last updated .