CVE-2021-38650: microsoft 365_apps
CVSS: 7.6v3.1HighModified
Published 15-09-2021Last modified 10-08-2026
Vulnerability summary
CVE-2021-38650 is a high (CVSS 7.6) vulnerability in microsoft 365_apps. EPSS estimates a 1.62% chance of exploitation in the next 30 days, higher than 75.7% of scored vulnerabilities.
CVSS score
7.6/10
010
High · v3.1 (CVE.org)EPSS score
1.62%
0%100%
Low · +0.01 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 15-09-2021PublishedVulnerability first disclosed.
- 10-08-2026Last modifiedVulnerability information updated.
Description
Microsoft Office Spoofing Vulnerability
CVSS metrics
3 scores · 2 sources · 2 versionsHigh 7.6Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N/E:U/RL:O/RC:CSourcesAll 2 agree
- NVDNIST7.6HighCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N
Medium 4.3Preferred score · NVD (NIST)
AV:N/AC:M/Au:N/C:N/I:P/A:NSourcesSingle source
EPSS trend
Probability
1.62%
Chance of exploitation in the next 30 days
Percentile
76%
Versus all other CVEs
30-day change
+0.01 pp
From 1.61% on 19-09-2026
19-09-202619-10-2026
EPSS score1.62%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Microsoft7 products
- 365_appsna
- microsoft 365 apps for enterprise≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases
- microsoft office 2013 service pack 1≥ 15.0.0, < 5381.1000
- microsoft office 2016≥ 16.0.0, < 5215.1000
- microsoft office 2019≥ 19.0.0, < https://aka.ms/OfficeSecurityReleases
1 vendor · 7 products
References
2 links- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-38650X Refsource MISCX TransferredPatchVendor Advisory