CVE-2021-31949: microsoft 365_apps Code Injection
CVSS: 7.3v3.1HighModified
Published 08-06-2021Last modified 28-02-2025
Vulnerability summary
CVE-2021-31949 is a high (CVSS 7.3) Code Injection vulnerability in microsoft 365_apps. EPSS estimates a 2.57% chance of exploitation in the next 30 days, higher than 84.8% of scored vulnerabilities.
CVSS score
7.3/10
010
High · v3.1 (CVE.org)EPSS score
2.57%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 08-06-2021PublishedVulnerability first disclosed.
- 28-02-2025Last modifiedVulnerability information updated.
Description
Microsoft Outlook Remote Code Execution Vulnerability
CVSS metrics
3 scores · 2 sources · 2 versionsHigh 7.3Preferred score · CVE.org (CNA)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L/E:U/RL:O/RC:CSourcesAll 2 agree
- NVDNIST7.3HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L
Medium 6.8Preferred score · NVD (NIST)
AV:N/AC:M/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
2.57%
Chance of exploitation in the next 30 days
Percentile
85%
Versus all other CVEs
30-day change
0.00 pp
From 2.57% on 18-09-2026
18-09-202618-10-2026
EPSS score2.57%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Microsoft7 products
- 365_appsna
- microsoft 365 apps for enterprise≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases
- microsoft office 2019≥ 19.0.0, < https://aka.ms/OfficeSecurityReleases
- microsoft outlook 2013 service pack 1≥ 15.0.0.0, < 15.0.5475.1000
- microsoft outlook 2016≥ 16.0.0.0, < 16.0.5356.1000.
1 vendor · 7 products
References
1 links
portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31949X Refsource MISCPatchVendor Advisory