CVE-2021-40454
Rich Text Edit Control Information Disclosure Vulnerability
Rich Text Edit Control Information Disclosure Vulnerability
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Rich Text Edit Control Information Disclosure Vulnerability
Rich Text Edit Control Information Disclosure Vulnerability
- Record
CVE-2021-40454- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:F/RL:O/RC:C - Updated
- 2026-11-02
EUVDEUVD-2021-27631
Rich Text Edit Control Information Disclosure Vulnerability
- Record
EUVD-2021-27631- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:F/RL:O/RC:C - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-j978-qg6w-8m3g
Rich Text Edit Control Information Disclosure Vulnerability
Rich Text Edit Control Information Disclosure Vulnerability
- Record
GHSA-j978-qg6w-8m3g- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-312
- Updated
- 2026-11-02
NVD
Rich Text Edit Control Information Disclosure Vulnerability
- Record
CVE-2021-40454- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - CVSS 2.0
- 2.1 Low
AV:L/AC:L/Au:N/C:P/I:N/A:N - Weakness
- CWE-312
- Updated
- 2026-11-02
Affected products
- microsoft 365 apps
- microsoft 365 apps for enterprise
- microsoft office 2013 service pack 1
- microsoft office 2016
- microsoft office 2019
- microsoft office 2019 for mac
- microsoft office ltsc 2021
- microsoft office ltsc for mac 2021
- microsoft office
- microsoft windows 10 version 1507
- microsoft windows 10 version 1607
- microsoft windows 10 version 1809
Show 21 moreShow less
- microsoft windows 10 version 1909
- microsoft windows 10 version 2004
- microsoft windows 10 version 20h2
- microsoft windows 10 version 21h1
- microsoft windows 11 version 21h2
- microsoft windows 8.1
- microsoft windows server 2012
- microsoft windows server 2012 (server core installation)
- microsoft windows server 2012 r2
- microsoft windows server 2012 r2 (server core installation)
- microsoft windows server 2016
- microsoft windows server 2016 (server core installation)
- microsoft windows server 2019
- microsoft windows server 2019 (server core installation)
- microsoft windows server 2022
- microsoft windows server version 2004
- microsoft windows server version 20h2
- microsoft windows 10
- microsoft windows 11
- microsoft windows rt 8.1
- microsoft windows server
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-40454 is a medium vulnerability (CVSS 5.5) in Microsoft 365 Apps, published October 13, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.50%, the 42nd percentile. No source names a fixed version.