Back
CVE-2021-40457Microsoft Dynamics 365 Customer Engagement Cross-Site Scripting Vulnerability
- 7.4HighCVSS base score
- 1.6%Exploitation in 30 daysEPSS · top 23% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
Microsoft Dynamics 365 Customer Engagement Cross-Site Scripting Vulnerability
Timeline
ID reserved
By microsoft
- 41 days later
· 41 days later
Published
- 3 years later
· 3 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 | High7.4 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N/E:F/RL:O/RC:C |
| NVDNVD · Modified | 3.1 | High7.4 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N |
- EPSS (exploitation in 30 days)
- 1.6% · top 23% of all CVEs (12 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.4.
Affected products
Microsoft · Microsoft Dynamics 365 Customer Engagement V9.1
- affected 9.0 – < 9.1.4
Microsoft · Microsoft Dynamics 365 Customer Engagement V9.0
- affected 9.0.0 – < 9.0.31.7
References
References1
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-40457 (opens in a new tab)x_refsource_MISCx_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)
- EUVD EUVD-2021-27634 (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://cveledger.app/cve/CVE-2021-40457)Record last updated .