CVE-2021-42292
Microsoft Excel Security Feature Bypass - [Actively Exploited]
Description
Microsoft Excel Security Feature Bypass Vulnerability
INFO
Published Date :
Nov. 10, 2021, 1:19 a.m.
Last Modified :
March 7, 2025, 9:54 p.m.
Remotely Exploit :
No
Source :
[email protected]
CISA KEV (Known Exploited Vulnerabilities)
For the benefit of the cybersecurity community and network defenders—and to help every organization better manage vulnerabilities and keep pace with threat activity—CISA maintains the authoritative source of vulnerabilities that have been exploited in the wild.
A security feature bypass vulnerability in Microsoft Excel would allow a local user to perform arbitrary code execution.
Apply updates per vendor instructions.
https://nvd.nist.gov/vuln/detail/CVE-2021-42292
Affected Products
The following products are affected by CVE-2021-42292
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 2.0 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Apply the appropriate Microsoft security updates.
- Ensure automatic updates are enabled for Microsoft 365 Apps, Office 2016 C2R, or Office 2019, or manually update them.
Public PoC/Exploit Available at Github
CVE-2021-42292 has a 3 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-42292.
| URL | Resource |
|---|---|
| https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-42292 | Patch Vendor Advisory |
| https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-42292 | Patch Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-42292 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-42292
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
None
Ostorlab KEV: One-command to detect most remotely known exploitable vulnerabilities. Sourced from CISA KEV, Google's Tsunami, Ostorlab's Asteroid and Bug Bounty programs.
cisa-kev vulnerability 0day cisa exploits
A Zeek package to detect CVE-2021-42292, a Microsoft Excel local privilege escalation exploit.
Zeek Makefile Shell
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-42292 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-42292 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Modified Analysis by [email protected]
Mar. 07, 2025
Action Type Old Value New Value -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-42292 -
Modified Analysis by [email protected]
Jul. 24, 2024
Action Type Old Value New Value Changed CPE Configuration OR *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:office:2013:sp1:*:*:*:*:*:* *cpe:2.3:a:microsoft:office:2013:sp1:*:*:rt:*:*:* *cpe:2.3:a:microsoft:office:2016:*:*:*:*:*:*:* *cpe:2.3:a:microsoft:office:2019:*:*:*:*:-:*:* *cpe:2.3:a:microsoft:office:2019:*:*:*:*:macos:*:* *cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:-:*:* *cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:macos:*:* OR *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:office:2013:sp1:*:*:-:*:*:* *cpe:2.3:a:microsoft:office:2013:sp1:*:*:rt:*:*:* *cpe:2.3:a:microsoft:office:2016:*:*:*:*:*:*:* *cpe:2.3:a:microsoft:office:2019:*:*:*:*:-:*:* *cpe:2.3:a:microsoft:office:2019:*:*:*:*:macos:*:* *cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:-:*:* *cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:macos:*:* -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Dec. 28, 2023
Action Type Old Value New Value Added CVSS V3.1 Microsoft Corporation AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H -
CWE Remap by [email protected]
Aug. 08, 2023
Action Type Old Value New Value Changed CWE NVD-CWE-noinfo NVD-CWE-Other -
CWE Remap by [email protected]
Jul. 12, 2022
Action Type Old Value New Value Changed CWE CWE-863 NVD-CWE-noinfo -
Initial Analysis by [email protected]
Nov. 10, 2021
Action Type Old Value New Value Added CVSS V2 Metadata Victim must voluntarily interact with attack mechanism Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:P/I:P/A:P) Added CVSS V3.1 NIST AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Changed Reference Type https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-42292 No Types Assigned https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-42292 Patch, Vendor Advisory Added CWE NIST CWE-863 Added CPE Configuration OR *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:office:2013:sp1:*:*:*:*:*:* *cpe:2.3:a:microsoft:office:2013:sp1:*:*:rt:*:*:* *cpe:2.3:a:microsoft:office:2016:*:*:*:*:*:*:* *cpe:2.3:a:microsoft:office:2019:*:*:*:*:-:*:* *cpe:2.3:a:microsoft:office:2019:*:*:*:*:macos:*:* *cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:-:*:* *cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:macos:*:*
Vulnerability Scoring Details
Base CVSS Score: 7.8
Base CVSS Score: 6.8
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
17.91 }} -8.07%
score
0.94740
percentile