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CVE-2021-42292

79
FAUCET Score

CVE-2021-42292 is a high-severity Microsoft Excel Security Feature Bypass vulnerability impacting Microsoft 365 Apps, Excel, and Office products. With a CVSS score of 7.8, it has a local attack vector requiring user interaction but low attack complexity, potentially leading to high impacts on confidentiality, integrity, and availability. This vulnerability is actively exploited in the wild and listed on CISA's KEV catalog, underscoring its critical nature despite the lack of public exploit modules in common databases.

Impacted Technologies

VendorProductVersion(s)CPE
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:*:*
2013CPE matchmatch criteria
cpe:2.3:a:microsoft:excel:2013:sp1:*:*:-:*:*:*
2013CPE matchmatch criteria
cpe:2.3:a:microsoft:excel:2013:sp1:*:*:rt:*:*:*
2013CPE matchmatch criteria
cpe:2.3:a:microsoft:office:2013:sp1:*:*:-:*:*:*
2013CPE matchmatch criteria
cpe:2.3:a:microsoft:office:2013:sp1:*:*:rt:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
31.95%
Probability of exploitation in next 30 days
EPSS Percentile
98.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
Added to KEV · Nov 17, 2021
This CVE's current EPSS score of 0.3195 is in the 99th percentile among its peer group of 11,617 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (19)

microsoftpatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: Microsoft Office 2019 for 32-bit editionsFixed in: https://aka.ms/OfficeSecurityReleases
microsoftpatch availablevia msrc
Product: Microsoft Office 2019 for 64-bit editionsFixed in: https://aka.ms/OfficeSecurityReleases
microsoftpatch availablevia msrc
Product: Microsoft 365 Apps for Enterprise for 32-bit SystemsFixed in: https://aka.ms/OfficeSecurityReleases
microsoftpatch availablevia msrc
Product: Microsoft 365 Apps for Enterprise for 64-bit SystemsFixed in: https://aka.ms/OfficeSecurityReleases
microsoftpatch availablevia msrc
Product: Microsoft Office LTSC 2021 for 64-bit editionsFixed in: https://aka.ms/OfficeSecurityReleases
microsoftpatch availablevia msrc
Product: Microsoft Office LTSC 2021 for 32-bit editionsFixed in: https://aka.ms/OfficeSecurityReleases
microsoftpatch availablevia msrc
Product: Microsoft Office 2019 for MacFixed in: 16.55.21111400
View patch
microsoftpatch availablevia msrc
Product: Microsoft Office LTSC for Mac 2021Fixed in: 16.55.21111400
View patch
microsoftpatch availablevia msrc
Product: Microsoft Excel 2016 (32-bit edition)Fixed in: 16.0.5239.1001
View patch
microsoftpatch availablevia msrc
Product: Microsoft Office 2016 (32-bit edition)Fixed in: 16.0.5239.1001
View patch
microsoftpatch availablevia msrc
Product: Microsoft Excel 2016 (64-bit edition)Fixed in: 16.0.5239.1001
View patch
microsoftpatch availablevia msrc
Product: Microsoft Office 2016 (64-bit edition)Fixed in: 16.0.5239.1001
View patch
microsoftpatch availablevia msrc
Product: Microsoft Excel 2013 RT Service Pack 1Fixed in: 15.0.5397.1001
microsoftpatch availablevia msrc
Product: Microsoft Office 2013 RT Service Pack 1Fixed in: 15.0.5397.1001
microsoftpatch availablevia msrc
Product: Microsoft Excel 2013 Service Pack 1 (32-bit editions)Fixed in: 15.0.5397.1001
View patch
microsoftpatch availablevia msrc
Product: Microsoft Office 2013 Service Pack 1 (32-bit editions)Fixed in: 15.0.5397.1001
View patch
microsoftpatch availablevia msrc
Product: Microsoft Excel 2013 Service Pack 1 (64-bit editions)Fixed in: 15.0.5397.1001
View patch
microsoftpatch availablevia msrc
Product: Microsoft Office 2013 Service Pack 1 (64-bit editions)Fixed in: 15.0.5397.1001
View patch

Vendor Advisories (1)

microsoft2021-Nov/CVE-2021-42292Important

Microsoft Excel Security Feature Bypass Vulnerability

Nov 9, 2021

References

cisa.gov / known-exploited-vulnerabilities-catalog
US Government Resource
portal.msrc.microsoft.com / en-US/security-guidance/advisory/CVE-2021-42292
PatchVendor Advisory