CVE-2025-15595
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedPrivilege escalation via dll hijacking in Inno Setup 6.2.1 and ealier versions.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceInno Setup 6.2.1 and earlier versions are vulnerable to DLL hijacking, where the application loads DLLs from insecure paths. An attacker with low-privilege access can place a malicious DLL in a location where Inno Setup loads it, potentially executing code with elevated privileges and achieving privilege escalation.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data<= 6.2.1CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Local
- Complexity
- Low
- Privileges
- 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
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Verify Inno Setup installationSearch for the Inno Setup compiler executable (iscc.exe) or the main Inno Setup program in common installation directories such as C:\Program Files\Inno Setup 6 or C:\Program Files (x86)\Inno Setup 6Affected if Inno Setup is found on the system
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Identify installed versionRight-click the iscc.exe or Inno Setup compiler executable, select Properties, and check the File Version field under the Details tab. Alternatively, run 'iscc.exe /?' and look for the version string in the outputAffected if The reported version is 6.2.1 or earlier
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Check DLL search path configurationUse Process Monitor or a similar tool to monitor the Inno Setup compiler (iscc.exe) during compilation and examine which directories it attempts to load DLLs from. Focus on paths that are user-writable or world-writableAffected if The DLL search path includes directories with weak permissions such as temp folders, user directories, or unsecured application folders
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Audit directory permissions in Inno Setup pathReview file system permissions on the Inno Setup installation directory and any paths in its DLL search order. Use icacls or similar tools to identify directories that allow low-privilege users to write filesAffected if Any directory in the DLL search path is writable by non-privileged users
The environment is affected if Inno Setup version 6.2.1 or earlier is installed AND the DLL search path includes directories where an attacker with low-privilege access can place a malicious DLL.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataUpdate Inno Setup to the latest version as the primary remediation. Additionally, ensure strict DLL search path ordering and avoid loading DLLs from user-writable directories.
- Consultation2.0 h
- Implementation1.0 h
- Testing2.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-15595 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2025-15595 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data