CVE-2021-43255 json
Microsoft Office Trust Center Spoofing Vulnerability
published 2021-12-15 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-30199
- cvss
- 5.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 2.1%
- EPSS 2.1% chance of exploitation in 30 days, percentile 81%
- public exploits
- 0
- none known
Summary
Microsoft Office Trust Center Spoofing Vulnerability
Patch / fix
- Microsoft Microsoft Office 2016 16.0.5254.1001
- Microsoft Microsoft Office 2013 Service Pack 1 15.0.5407.1000
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2 y ago
Exploit prediction
2.08% chance of exploitation in the next 30 days, higher than 81% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.5 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C |
| CNA | 3.1 | 5.5 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N |
| NVD | 3.1 | 5.5 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N |
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:N/I:P/A:N |
Affected products
- Microsoft Microsoft Office LTSC 2021
- Microsoft Microsoft Office 2019
- Microsoft Microsoft 365 Apps for Enterprise
- Microsoft Microsoft Office 2016
- Microsoft Microsoft Office 2013 Service Pack 1
References
-
portal.msrc.microsoft.com
/en-US/security-guidance/advisory/CVE-2021-43255
patch, vendor-advisory
Sources
- CVE List CVE-2021-43255
- NVD CVE-2021-43255
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