5.5

CVE-2021-43255: microsoft 365_apps

CVSS: 5.5v3.1MediumModified
Published 15-12-2021Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2021-43255 is a medium (CVSS 5.5) vulnerability in microsoft 365_apps. EPSS estimates a 2.08% chance of exploitation in the next 30 days, higher than 81.2% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
2.08%
0%100%
Low · +0.10 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 15-12-2021
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

Description

Microsoft Office Trust Center Spoofing Vulnerability

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

2.08%

Chance of exploitation in the next 30 days

Percentile

81%

Versus all other CVEs

30-day change

+0.10 pp

From 1.98% on 19-09-2026

19-09-202619-10-2026
EPSS score
2.08%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Microsoft8 products

1 vendor · 8 products

References

1 links