Microsoft Excel Information Disclosure Vulnerability

published 2021-10-13 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-27649

cvss: 5.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.7%; EPSS 0.7% chance of exploitation in 30 days, percentile 54%
public exploits: 0; none known

Patch / fix

fixed in 6 links 1

Microsoft Microsoft Office Online Server 16.0.10379.20000
Microsoft Microsoft Excel 2016 16.0.5227.1000
Microsoft Microsoft Office 2016 16.0.5227.1000
Microsoft Microsoft Excel 2013 Service Pack 1 15.0.5389.1000
Microsoft Microsoft Office 2013 Service Pack 1 15.0.5389.1000
Microsoft Microsoft Office Web Apps Server 2013 Service Pack 1 15.0.5389.1000

portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-40472 advisory

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 2 y ago (2024-07-23)

Exploit prediction

0.73% chance of exploitation in the next 30 days, higher than 54% 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:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
CNA	3.1	5.5	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
NVD	2.0	2.1	AV:L/AC:L/Au:N/C:P/I:N/A:N

Affected products

Microsoft Microsoft Office 2019
Microsoft Microsoft Office Online Server
Microsoft Microsoft 365 Apps for Enterprise
Microsoft Microsoft Office LTSC 2021
Microsoft Microsoft Excel 2016
Microsoft Microsoft Office 2016
Microsoft Microsoft Excel 2013 Service Pack 1
Microsoft Microsoft Office 2013 Service Pack 1
Microsoft Microsoft Office Web Apps Server 2013 Service Pack 1

References

portal.msrc.microsoft.com /en-US/security-guidance/advisory/CVE-2021-40472
patch, vendor-advisory

Sources

CVE List CVE-2021-40472
NVD CVE-2021-40472

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary