Cyber Resilience

CVE-2023-36780

Microsoft Skype For Business Server 2015 … 2019

Published
10 October 2023
Modified
21 November 2024
Patch / advisory
View advisory
CVSS Score v3.1 7.2
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.026 84th percentile
Risk Priority 57 floored blend · peak EPSS

Summary

CVE-2023-36780 is a high-severity Untrusted Search Path (CWE-426) vulnerability in Microsoft Skype For Business Server. Its CVSS base score is 7.2 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Path Interception (T1034); ranked in the top 16% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

OWASP Top 10 for Web (2025)

A08:2025 Software or Data Integrity Failures

EU & UK References

Vulnerability Data

Skype for Business Remote Code Execution Vulnerability

CWE(s)
CWE-426NVD-CWE-noinfo

Related Threats

MITRE ATT&CK Enterprise Techniques

T1034 Path Interception Persistence
**This technique has been deprecated.
attack.mitre.org →
T1574 Hijack Execution Flow Stealth
Adversaries may execute their own malicious payloads by hijacking the way operating systems run programs.
attack.mitre.org →
T1574.001 DLL Stealth
Adversaries may abuse dynamic-link library files (DLLs) in order to achieve persistence, escalate privileges, and evade defenses.
attack.mitre.org →
T1574.008 Path Interception by Search Order Hijacking Stealth
Adversaries may execute their own malicious payloads by hijacking the search order used to load other programs.
attack.mitre.org →
T1574.007 Path Interception by PATH Environment Variable Stealth
Adversaries may execute their own malicious payloads by hijacking environment variables used to load libraries.
attack.mitre.org →
T1574.009 Path Interception by Unquoted Path Stealth
Adversaries may execute their own malicious payloads by hijacking vulnerable file path references.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2026-57097Same vendor: Microsoft
CVE-2023-36898Same vendor: Microsoft
CVE-2024-30100Same vendor: Microsoft
CVE-2024-43616Same vendor: Microsoft
CVE-2023-41763Same product: Microsoft Skype For Business Server
CVE-2026-25190Same vendor: Microsoft
CVE-2023-36789Same product: Microsoft Skype For Business Server
CVE-2025-60718Same vendor: Microsoft
CVE-2025-21365Same vendor: Microsoft
CVE-2023-21763Same vendor: Microsoft

Affected Assets

microsoft
skype for business server
2015, 2019

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-05 full match
prevents

Preventing execution of unauthorized code directly blocks the malicious binaries that an untrusted search path would load.

PR.PS-06 mostly match
prevents

Secure development practices include avoiding or sanitizing externally influenced search paths in application code.

PR.PS-01 partial match
prevents

Hardened configuration baselines can enforce safe search paths and restrict environment variables that enable the weakness.

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.8.29 Security testing in development and acceptance mostly match
finds

Security testing can discover search-path issues but does not itself prevent them in production code.

A.8.19 Installation of software on operational systems partial match
degrades

Restricting software installation reduces the chance that untrusted binaries or libraries are placed in search paths.

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

Secure architecture principles include hard-coded or validated search paths and avoiding reliance on untrusted directories.

A.8.28 Secure coding partial match
prevents

Secure coding standards require absolute paths or integrity-checked search paths, directly mitigating CWE-426.

A.8.32 Change management none match
none

Change-management processes can enforce review of path-handling changes, indirectly lowering risk.

References