What is the CVSS score of CVE-2025-10101?

CVE-2025-10101 has a CVSS 3.1 base score of 8.1 (High). CVSS vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H. EPSS exploitation probability: 0.0%.

Which versions of macOS are affected by CVE-2025-10101?

Avast Antivirus for macOS versions 15.7 through 3.9.2025 (before patch) contains a heap buffer overflow vulnerability that could allow local attackers to execute code or disable antivirus protection…. A patch is available.

How to fix or mitigate CVE-2025-10101?

Within 24 hours: Inventory all macOS systems running Avast Antivirus and identify those on versions 15.7 through 3.9.2025 (prior to patch release). Within 7 days: Deploy Avast Antivirus version 3.9.2025 or later to all affected macOS endpoints through your patch management system. Within 30 days: Verify patch deployment completion across all macOS fleet and confirm systems are running the patched version.

macOS CVE-2025-10101

EUVD-2025-200024 HIGH

Heap-based Buffer Overflow (CWE-122)

2025-12-01 security@nortonlifelock.com

Buffer Overflow Denial Of Service Heap Overflow Apple macOS

8.1

CVSS 3.1

CVSS VectorNVD

CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

Attack Vector

Local

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Updated

Apr 16, 2026 - 06:25 EUVD-patch-fix

executive_summary

Re-analysis Queued

Apr 16, 2026 - 05:29 backfill_euvd_patch

patch_released

Patch available

Apr 16, 2026 - 05:29 EUVD

3.9.2025

EUVD ID Assigned

Mar 15, 2026 - 13:34 euvd

EUVD-2025-200024

Analysis Generated

Mar 15, 2026 - 13:34 vuln.today

CVE Published

Dec 01, 2025 - 16:15 nvd

HIGH 8.1

DescriptionNVD

Heap-based Buffer Overflow, Out-of-bounds Write vulnerability in Avast Antivirus on MacOS of a crafted Mach-O file may allow Local Execution of Code or Denial of Service of antivirus protection. This issue affects Antivirus: from 15.7 before 3.9.2025.

Analysis

Technical ContextAI

A buffer overflow occurs when data written to a buffer exceeds its allocated size, potentially overwriting adjacent memory and corrupting program state. This vulnerability is classified as Heap-based Buffer Overflow (CWE-122).

RemediationAI

Use memory-safe languages or bounds-checked functions. Enable ASLR, DEP/NX, and stack canaries. Apply vendor patches promptly.

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CVE-2025-10101 vulnerability details – vuln.today

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macOS CVE-2025-10101

CVSS VectorNVD

Lifecycle Timeline

DescriptionNVD

Analysis

Technical ContextAI

RemediationAI

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