Gen Digital AVG Antivirus Free up to 26.7 Avast sandbox minifilter driver aswSnx.sys privileges management

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
8.6$0-$5k0.00

Summaryinfo

A vulnerability classified as very critical has been found in Gen Digital AVG Antivirus Free, AVG Internet Security, AVG Ultimate, Avast Business Security, Avast Free Antivirus, Avast One, Avast Premium Security, Avast Ultimate, Norton 360 Advanced, Norton 360 Deluxe, Norton 360 Standard and Norton Antivirus Plus up to 26.7. This affects an unknown part of the file aswSnx.sys of the component Avast sandbox minifilter driver. Performing a manipulation results in privileges management. This vulnerability is reported as CVE-2026-82964. The attack requires a local approach. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as very critical, was found in Gen Digital AVG Antivirus Free, AVG Internet Security, AVG Ultimate, Avast Business Security, Avast Free Antivirus, Avast One, Avast Premium Security, Avast Ultimate, Norton 360 Advanced, Norton 360 Deluxe, Norton 360 Standard and Norton Antivirus Plus up to 26.7. This affects some unknown processing of the file aswSnx.sys of the component Avast sandbox minifilter driver. The manipulation with an unknown input leads to a privileges management vulnerability. CWE is classifying the issue as CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Improper preservation of permissions in the Avast sandbox minifilter driver (aswSnx.sys) on Windows allows a local, low-privileged attacker executing inside the sandbox to escape file isolation and escalate to SYSTEM. When the sandbox virtualizes a file it copies the original security descriptor, but the driver opened the virtualization target object with GENERIC_WRITE and FILE_WRITE_ATTRIBUTES only, omitting WRITE_DAC. Every attempt to apply the original DACL therefore failed, and the failure was discarded silently, leaving virtualized copies of sensitive files with permissive permissions. Because the IRP_MJ_CREATE callback additionally did not strip WRITE_DAC for sensitive directories, a sandboxed process could rewrite the security descriptor of a virtualized object, read the virtualized copy of the SAM database, extract local NTLM password hashes and execute code as SYSTEM. The absence of an IRP_MJ_SET_SECURITY callback in the driver's operation registration table is a related defense-in-depth gap, but it is not the control that prevents this attack.

The advisory is shared at gendigital.com. This vulnerability is uniquely identified as CVE-2026-82964 since 08/31/2026. The exploitability is told to be easy. An attack has to be approached locally. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/16/2026). MITRE ATT&CK project uses the attack technique T1068 for this issue.

Upgrading to version 26.8 eliminates this vulnerability.

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Productinfo

Type

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.8
VulDB Meta Temp Score: 8.6

VulDB Base Score: 8.8
VulDB Temp Score: 8.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 8.8
CNA Vector (GEN): 🔒

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Privileges management
CWE: CWE-269 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: AVG Antivirus Free/AVG Internet Security/AVG Ultimate/Avast Business Security/Avast Free Antivirus/Avast One/Avast Premium Security/Avast Ultimate/Norton 360 Advanced/Norton 360 Deluxe/Norton 360 Standard/Norton Antivirus Plus 26.8

Timelineinfo

08/31/2026 CVE reserved
09/16/2026 +16 days Advisory disclosed
09/16/2026 +0 days VulDB entry created
09/16/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: gendigital.com
Status: Confirmed

CVE: CVE-2026-82964 (🔒)
GCVE (CVE): GCVE-0-2026-82964
GCVE (VulDB): GCVE-100-405957

Entryinfo

Created: 09/16/2026 16:42
Changes: 09/16/2026 16:42 (65)
Complete: 🔍
Cache ID: 216::103

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