Code execution via integer-overflowed executable parsing
Published Jun 12, 2026 · Updated Jun 12, 2026
Heap out-of-bounds write in Gen Digital Avira Antivirus before 8.3.70.104 allows local users to execute code via a malformed MS-DOS file. The scan engine overflows an integer while parsing the executable, derives an undersized heap buffer, and writes beyond that allocation. Exploitation requires the engine to scan the crafted file and user interaction; successful corruption executes code or crashes the engine process.
Summary
What happened
Heap out-of-bounds write in Gen Digital Avira Antivirus before 8.3.70.104 allows local users to execute code via a malformed MS-DOS file. The scan engine overflows an integer while parsing the executable, derives an undersized heap buffer, and writes beyond that allocation. Exploitation requires the engine to scan the crafted file and user interaction; successful corruption executes code or crashes the engine process.
The record
- CVE
- CVE-2025-14098
- Published
- Jun 12, 2026
- Updated
- Jun 12, 2026
- Vendor
- Gen Digital
- Product
- Avira Antivirus
- Classifications
- CWE-787, CWE-190, CAPEC-549, T1203
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 12, 2026CVE publishedPublication date reported by the CVE source.
- Jun 12, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <8.3.70.104
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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