Security Resilience

CVE-2023-21736

Microsoft Visio 2013 … 2016

Published
10 January 2023
Modified
21 November 2024
CVSS Score v3.1 7.8
Click a component to see what it means
Raw vectorCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS Score 0.0072 53th percentile
Risk Priority 59 floored blend · peak EPSS

CVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.

Summary

CVE-2023-21736 is a high-severity Incorrect Conversion between Numeric Types (CWE-681) vulnerability in Microsoft Visio. Its CVSS base score is 7.8 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Junk Data (T1001.001); ranked in the top 47% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability Data

Microsoft Office Visio Remote Code Execution Vulnerability

CWE(s)
CWE-681NVD-CWE-noinfo

Related Threats

MITRE ATT&CK Enterprise Techniques

T1001.001 Junk Data Command And Control
Adversaries may add junk data to protocols used for command and control to make detection more difficult.
attack.mitre.org →
T1001.002 Steganography Command And Control
Adversaries may use steganographic techniques to hide command and control traffic to make detection efforts more difficult.
attack.mitre.org →
T1003.002 Security Account Manager Credential Access
Adversaries may attempt to extract credential material from the Security Account Manager (SAM) database either through in-memory techniques or through the Windows Registry where the SAM database is stored.
attack.mitre.org →
T1003.004 LSA Secrets Credential Access
Adversaries with SYSTEM access to a host may attempt to access Local Security Authority (LSA) secrets, which can contain a variety of different credential materials, such as credentials for service accounts.
attack.mitre.org →
T1006 Direct Volume Access Stealth
Adversaries may directly access a volume to bypass file access controls and file system monitoring.
attack.mitre.org →
T1008 Fallback Channels Command And Control
Adversaries may use fallback or alternate communication channels if the primary channel is compromised or inaccessible in order to maintain reliable command and control and to avoid data transfer thresholds.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2024-43463Same product: Microsoft 365 Apps
CVE-2025-53733Same product: Microsoft 365 Apps
CVE-2023-21741Same product: Microsoft 365 Apps
CVE-2023-21737Same product: Microsoft 365 Apps
CVE-2023-28285Same product: Microsoft 365 Apps
CVE-2023-33149Same product: Microsoft 365 Apps
CVE-2023-21735Same product: Microsoft 365 Apps
CVE-2023-33158Same product: Microsoft 365 Apps
CVE-2023-36045Same product: Microsoft 365 Apps
CVE-2024-30101Same product: Microsoft 365 Apps

Affected Assets

microsoft
365 apps
all versions
microsoft
office
2019
microsoft
office long term servicing channel
2021
microsoft
visio
2013, 2016

Mitigating Controls

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 partial match
blocks

Secure SDLC practices directly require code reviews, static analysis, and developer training that catch and prevent numeric type-conversion errors.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.25 Secure development life cycle partial match
blocks

Secure development lifecycle includes type-safety and conversion checks that reduce numeric truncation risks.

A.8.26 Application security requirements partial match
blocks

A.8.26 requires identifying and specifying security requirements (including resilience against certain attacks like buffer overflows or SQL injection) but does not itself implement any conversion checks, bounds validation, or other mechanisms that would stop exploitation of incorrect numeric type conversions

A.8.27 Secure system architecture and engineering principles partial match
blocks

Secure architecture principles promote strong typing and safe conversion practices.

A.8.28 Secure coding partial match
prevents

Secure coding standards directly address correct numeric type conversions and overflow checks.

A.8.29 Security testing in development and acceptance partial match
finds

Security testing can detect numeric conversion defects before release.

A.8.8 Management of technical vulnerabilities partial match
removes

References