CVE-2025-47171: microsoft 365_apps Improper Input Validation
CVSS: 6.7v3.1MediumAnalyzed
Published 10-06-2025Last modified 26-02-2026
Vulnerability summary
CVE-2025-47171 is a medium (CVSS 6.7) Improper Input Validation vulnerability in microsoft 365_apps. EPSS estimates a 1.68% chance of exploitation in the next 30 days, higher than 76.6% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
6.7/10
010
Medium · v3.1 (CVE.org)EPSS score
1.68%
0%100%
Low · +0.03 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1exploit-database
Timeline
- 10-06-2025PublishedVulnerability first disclosed.
- 26-02-2026Last modifiedVulnerability information updated.
Description
Improper input validation in Microsoft Office Outlook allows an authorized attacker to execute code locally.
CVSS metrics
2 scores · 2 sources · 1 versionMedium 6.7Preferred score · CVE.org (CNA)
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:CSourcesAll 2 agree
- NVDNIST6.7MediumCVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
EPSS trend
Probability
1.68%
Chance of exploitation in the next 30 days
Percentile
77%
Versus all other CVEs
30-day change
+0.03 pp
From 1.66% on 19-09-2026
19-09-202619-10-2026
EPSS score1.68%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundMicrosoft Outlook - Remote Code Execution (RCE)
Maturity: poc
Weaknesses
CWE · root causeAffected systems
Microsoft9 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 office ltsc 2021≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases
- microsoft office ltsc 2024≥ 16.0.0, < https://aka.ms/OfficeSecurityReleases
1 vendor · 9 products