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Out-of-bounds ReadWeakness · CWE-125

CVE-2025-7003

HIGH · 7.8 CVSS v3.1 Published 2026-06-12
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
81/100
Remediation priority · High
No privileges

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 · unedited
Heap buffer out-of-bounds read vulnerability in Avira Antivirus engine when scanning a malformed PDF 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 confidence

A heap-based buffer out-of-bounds read vulnerability exists in the Avira Antivirus scanning engine when parsing malformed PDF files. The vulnerability can be triggered during routine antivirus scans of maliciously crafted PDF documents, potentially allowing local code execution or causing the antivirus engine process to crash.

MitigationUpdate Avira Antivirus engine to version 8.3.70.56 or later to remediate this vulnerability. Organizations should verify engine version across all Windows, macOS, and Linux installations and apply the update promptly.

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 checks

Work through these to decide whether this CVE applies to you.

  1. Verify Avira Antivirus is installed
    Check for Avira Antivirus installation by reviewing installed programs on Windows (Control Panel > Programs), macOS (Applications folder), or Linux (dpkg -l | grep -i avira or rpm -qa | grep -i avira).
    Affected if Avira Antivirus is not installed on the system.
  2. Locate the Avira scan engine version
    Open the Avira Antivirus GUI and navigate to Help > About, or check the engine version via command line. On Windows, the version is often visible in the main GUI under 'Protection status' or 'About'. On Linux, run 'avscan --version' or check the version file typically located in /usr/lib/Avira/scanengine/version. On macOS, check Avira Antivirus > About Avira Antivirus from the menu bar.
    Affected if Unable to locate or confirm the installed Avira engine version.
  3. Compare installed engine version to fixed release
    Compare the discovered engine version against the fixed version 8.3.70.56. The vulnerability exists in versions prior to 8.3.70.56.
    Affected if The installed engine version is lower than 8.3.70.56 (for example, 8.3.70.0 through 8.3.70.55 or any earlier version).
  4. Confirm PDF scanning is enabled
    Verify that real-time protection or on-demand scanning has PDF file type scanning enabled. In Avira settings, check under 'Real-Time Protection' > 'Scan' or 'Configuration' > 'Scanner' to see if PDF files are set to be scanned. The vulnerability triggers specifically when the engine parses PDF files.
    Affected if PDF scanning is enabled and the engine version is below 8.3.70.56.

The system is affected if Avira Antivirus is installed with a scan engine version below 8.3.70.56 and PDF scanning (real-time or on-demand) is enabled.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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 · scoped
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Update Avira Antivirus engine to version 8.3.70.56 or later to remediate this vulnerability. Organizations should verify engine version across all Windows, macOS, and Linux installations and apply the update promptly.

Recommended fix High confidence

Engine version 8.3.70.56 or later

  1. Open Avira Antivirus application on your system
  2. Navigate to the Settings or Updates section
  3. Check the current engine version under 'About' or 'Product Information'
  4. Look for and install any available updates to bring the engine to version 8.3.70.56 or later
  5. Restart the antivirus application if prompted
  6. Verify the engine version has been updated to 8.3.70.56 or newer after the update completes

Generated from the published advisory — verify against the referenced sources before acting.

Have this fixed Scoped from the published advisory
  • Consultation2.0 h
  • Implementation2.0 h
  • Testing1.0 h
  • Review / QA1.0 h
6.0 hours of engineering $1,090
Get help mitigating

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,744.

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2025-7003 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • 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