CVE-2021-28456
Microsoft Excel Information Disclosure Vulnerability
5.5 Medium
Microsoft Excel Information Disclosure Vulnerability
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
3.67%Up 3.3 points since Apr 14, 2021
What each source reports
CVE List Score used
Microsoft Excel Information Disclosure Vulnerability
Microsoft Excel Information Disclosure Vulnerability
- Record
CVE-2021-28456- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:P/RL:O/RC:C - Updated
- 2026-11-02
EUVDEUVD-2021-15135
Microsoft Excel Information Disclosure Vulnerability
- Record
EUVD-2021-15135- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:P/RL:O/RC:C - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-5v9r-32j3-v3c5
Microsoft Excel Information Disclosure Vulnerability
Microsoft Excel Information Disclosure Vulnerability
- Record
GHSA-5v9r-32j3-v3c5- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
NVD
Microsoft Excel Information Disclosure Vulnerability
- Record
CVE-2021-28456- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:P/I:N/A:N - Updated
- 2026-11-02
Affected products
- microsoft excel
- microsoft 365 apps
- microsoft 365 apps for enterprise
- microsoft excel 2010 service pack 2
- microsoft excel 2013 service pack 1
- microsoft excel 2016
- microsoft office 2019
- microsoft office 2019 for mac
- microsoft office online server
- microsoft office web apps server 2013 service pack 1
- microsoft office
- microsoft office web apps 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-2021-28456 is a medium vulnerability (CVSS 5.5) in Microsoft Excel, published April 13, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 3.67%, the 89th percentile. No source names a fixed version.