CVE-2025-41359
Smallsrv Small Http Server 3.06.36 – 3.06.38
Raw vector
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XSummary
CVE-2025-41359 is a high-severity Unquoted Search Path or Element (CWE-428) vulnerability in Smallsrv Small Http Server. Its CVSS base score is 8.5 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Path Interception (T1034); ranked at the 5th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified map to SA-11 (Developer Testing and Evaluation) and SA-15 (Development Process, Standards, and Tools) — see the control section below for these in your framework.
Deeper analysis AI-assisted summary
Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.
CVE-2025-41359 is an unquoted service path vulnerability in Small HTTP Server version 3.06.36, specifically impacting the service executable located at 'C:\Program Files (x86)\shttps_mg\http.exe service'. This classic misconfiguration (CWE-428) occurs because the service path lacks proper quotation marks, allowing the Windows service control manager to prioritize executable searches in higher directories within the system path. The vulnerability was published on 2026-03-26 and carries a CVSS v3.1 base score of 7.8 (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H), indicating high impact on confidentiality, integrity, and availability.
A local attacker with low privileges can exploit this flaw by placing a malicious executable named 'http.exe' in a directory that takes precedence in the system's PATH environment variable, such as C:\Windows. When the service starts or restarts, it will execute the attacker's binary instead of the legitimate one, enabling arbitrary code execution with the privileges of the service account. Successful exploitation could grant unauthorized system access, privilege escalation, or denial-of-service through service disruption.
Mitigation guidance from advisories, including the INCIBE-CERT notice at https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-small-http-server-smallsrv, recommends quoting the service path correctly in the Windows registry, applying available security patches to update the software, and limiting physical and network access to affected systems to reduce local attack opportunities.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-209051
- 🇪🇸 INCIBE: www.incibe.es
Vulnerability Data
Vulnerability related to an unquoted service path in Small HTTP Server 3.06.36, specifically affecting the executable located at 'C:\Program Files (x86)\shttps_mg\http.exe service'. This misconfiguration allows a local attacker to place a malicious executable with the same name in a higher…
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priority directory, causing the service to execute the malicious file instead of the legitimate one. Exploiting this flaw could allow arbitrary code execution, unauthorized access to the system, or service disruption. To mitigate the risk, the service path must be properly quoted, and systems must be kept up to date with security patches, while restricting physical and network access.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise Techniques
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Developer testing and evaluation can discover unquoted search paths through static analysis or dynamic test cases.
Documented development standards and tools can mandate proper quoting and escaping of path elements.
Engineering principles can require safe construction and quoting of search paths and command elements.
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.
Secure SDLC practices directly prevent path-handling flaws such as unquoted elements during development.
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.
Security testing in development can detect unquoted search-path issues before deployment.
Enforcing controlled software installation can prevent unquoted search-path elements in executables and scripts.
Secure development lifecycle practices include input validation and path handling that reduce unquoted search-path weaknesses.
Secure system architecture and engineering principles require safe path construction and quoting conventions.
Secure coding standards directly mandate quoting search paths and avoiding unsafe path construction.
Change-management processes can enforce review of path-handling changes that might introduce unquoted elements.