7.8High KEV

CVE-2021-42292Microsoft Excel Security Feature Bypass Vulnerability

Microsoft Microsoft 365 Apps for Enterprise; Microsoft Microsoft Excel 2013 Service Pack 1; Microsoft Microsoft Excel 2016; Microsoft Microsoft Office 2013 Ser… Published: 2021-11-10 03:47 (4 years ago)

Known exploited — Microsoft Excel Security Feature Bypass

CISA confirmed this vulnerability is used in real attacks on 17.11.2021. Remediation deadline for US federal agencies: 01.12.2021.

Required action: Apply updates per vendor instructions. https://nvd.nist.gov/vuln/detail/CVE-2021-42292

Description

Microsoft Excel Security Feature Bypass Vulnerability

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

Vendor	Product	Versions
microsoft	365 apps	16.0.1 – < https://aka.ms/OfficeSecurityReleases
microsoft	excel	2013
microsoft	excel 2013	15.0.0.0 – < 15.0.5397.1001
microsoft	excel 2016	16.0.0.0 – < 16.0.5239.1001
Microsoft	Microsoft 365 Apps for Enterprise	16.0.1 – < https://aka.ms/OfficeSecurityReleases
Microsoft	Microsoft Excel 2013 Service Pack 1	15.0.0.0 – < 15.0.5397.1001
Microsoft	Microsoft Excel 2016	16.0.0.0 – < 16.0.5239.1001
Microsoft	Microsoft Office 2013 Service Pack 1	15.0.0 – < 15.0.5397.1001
Microsoft	Microsoft Office 2016	16.0.0 – < 16.0.5239.1001
Microsoft	Microsoft Office 2019	19.0.0 – < https://aka.ms/OfficeSecurityReleases
Microsoft	Microsoft Office 2019 for Mac	16.0.0 – < 16.55.21111400
Microsoft	Microsoft Office LTSC 2021	16.0.1 – < https://aka.ms/OfficeSecurityReleases
Microsoft	Microsoft Office LTSC for Mac 2021	16.0.1 – < 16.55.21111400
microsoft	office	2013
microsoft	office 2013	15.0.0 – < 15.0.5397.1001
microsoft	office 2016	16.0.0 – < 16.0.5239.1001
microsoft	office 2019	19.0.0 – < https://aka.ms/OfficeSecurityReleases
microsoft	office 2021	16.0.1 – < https://aka.ms/OfficeSecurityReleases
microsoft	office macos 2021	16.0.1 – < 16.55.21111400

References and patches

Microsoft Excel Security Feature Bypass Vulnerability vendor-advisorypatchPatchVendor Advisory
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-42292 PatchVendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-42292 US Government Resource

CPE matches (NVD) (15)

cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:*:*
cpe:2.3:a:microsoft:excel:2013:sp1:*:*:-:*:*:*
cpe:2.3:a:microsoft:excel:2013:sp1:*:*:rt:*:*:*
cpe:2.3:a:microsoft:excel:2016:*:*:*:*:*:x64:*
cpe:2.3:a:microsoft:excel:2016:*:*:*:*:*:x86:*
cpe:2.3:a:microsoft:office:2013:sp1:*:*:-:*:*:*
cpe:2.3:a:microsoft:office:2013:sp1:*:*:rt:*:*:*
cpe:2.3:a:microsoft:office:2019:*:*:*:*:macos:*:*
cpe:2.3:a:microsoft:office_2016:-:*:*:*:-:*:x64:*
cpe:2.3:a:microsoft:office_2016:-:*:*:*:-:*:x86:*
cpe:2.3:a:microsoft:office_2019:-:*:*:*:*:*:x64:*
cpe:2.3:a:microsoft:office_2019:-:*:*:*:*:*:x86:*
cpe:2.3:a:microsoft:office_2021:-:*:*:*:ltsc:-:x64:*
cpe:2.3:a:microsoft:office_2021:-:*:*:*:ltsc:-:x86:*
cpe:2.3:a:microsoft:office_2021:-:*:*:*:ltsc:macos:-:*

CVSS score

7.8High

Source: microsoft · CVSS 3.1

Attack vector: Local
Attack complexity: Low
Privileges required: None
User interaction: Required
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: High

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C

All scores (4)

cna	CVSS 3.1	7.8High
secure@microsoft.com	CVSS 3.1	7.8High
nvd	CVSS 3.1	7.8High
nvd	CVSS 2.0	6.8Medium

EPSS (chance of exploitation in 30 days)

43.00%

higher than 99% of all CVEs

CISA assessment (SSVC)

Exploitation: active
Automatable: no
Technical impact: total

Timeline

ID reserved2021-10-12
Published2021-11-10 03:47
Reached IP-DB2026-10-24 23:34
Added to KEV2021-11-17
Last updated2026-08-19 22:23

Assigned by (CNA): microsoft
NVD status: Analyzed

View at source: CVE.org · NVD

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