CVE-2025-10101

Code execution via malformed Mach-O scanning

Published Dec 1, 2025 · Updated Jun 12, 2026

Out-of-bounds read in Gen Digital antivirus products before VPS 25090300 allows local users to execute code via a malformed Mach-O file. The shared scanning engine reads past a heap buffer while parsing untrusted Mach-O data; the exact faulty routine and bounds check are undisclosed. Exploitation requires the crafted file to reach local antivirus scanning and can execute code in the scanner context or crash the antivirus process.

CVSS severity7.8
High
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in Gen Digital antivirus products before VPS 25090300 allows local users to execute code via a malformed Mach-O file. The shared scanning engine reads past a heap buffer while parsing untrusted Mach-O data; the exact faulty routine and bounds check are undisclosed. Exploitation requires the crafted file to reach local antivirus scanning and can execute code in the scanner context or crash the antivirus process.

The record

CVE
CVE-2025-10101
Published
Dec 1, 2025
Updated
Jun 12, 2026
Vendor
Gen Digital
Product
Avast One
Classifications
CWE-125, CAPEC-549, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 1, 2025CVE publishedPublication date reported by the CVE source.
  2. 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.

  1. Affected versionversion=0 <25090300

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Gen Digital · Avast Oneversion=0 <25090300
Gen Digital · Avast Business Antivirusversion=0 <25090300
Gen Digital · Norton AntiVirusversion=0 <25090300
Gen Digital · AVG Antivirusversion=0 <25090300
Gen Digital · Avast Antivirusversion=0 <25090300

Published CVSS scores

7.8Gen Digital CNACVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
CAPEC-549Local Execution of Code
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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