CVE-2025-7017
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 · uneditedHeap buffer out-of-bounds read vulnerability in Avira Antivirus engine when scanning a malformed Windows MSI file may allow Local Execution of Code or Denial-of-Service of the antivirus engine process. This issue affects Avira Antivirus on Windows, macOS, and Linux for engine builds before 8.3.70.56.
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 confidenceHeap buffer out-of-bounds read vulnerability in Avira Antivirus engine triggered during scanning of malformed Windows MSI files. This memory safety flaw in the engine's MSI parser can potentially allow local code execution or crash the antivirus process.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS 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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Confirm Avira Antivirus is installedCheck for Avira processes (Avira.Service.exe, Avira.SecurityService.exe, avguard.exe) or look for Avira in Add/Remove Programs. On Linux, run 'dpkg -l | grep -i avira' or 'rpm -qa | grep -i avira'. On macOS, check /Applications for Avira apps.Affected if Avira Antivirus is present on the system
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Locate the engine versionOpen Avira GUI and go to Help > About, or check the engine version in system logs (often in C:\ProgramData\Avira\Logs\ or /var/log/avira/). On Windows, you can also check the file version of AviraEngine.dll in the installation directory.Affected if Unable to retrieve engine version information
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Compare engine build to patched versionIdentify the engine build number (format typically like x.y.z.ww). Compare it numerically to the fixed build 8.3.70.56. The vulnerability exists in versions before this build.Affected if Engine build number is lower than 8.3.70.56 (for example, 8.3.69.x or earlier)
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Verify MSI scanning capability is activeConfirm real-time protection or on-demand scanning is enabled in Avira settings. MSI file scanning is part of the antivirus scanning engine and is typically active by default when protection is on.Affected if Real-time or scheduled scanning is enabled (default state)
User is affected if Avira Antivirus is installed with engine build version lower than 8.3.70.56 and scanning is enabled (the default state).
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.
dbcve · scopedUpdate Avira Antivirus engine to build 8.3.70.56 or later to patch the vulnerability. Ensure all affected platforms (Windows, macOS, Linux) are updated.
Avira Antivirus engine build 8.3.70.56 or later
- Ensure your Avira Antivirus installation is running a version with engine build before 8.3.70.56
- Update Avira Antivirus to the latest available version which includes engine build 8.3.70.56 or later
- Verify the engine version after update by checking the Avira product information or about section
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation3.0 h
- Implementation4.0 h
- Testing2.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,880.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-7017 — 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-2025-7017 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