CVE-2009-3522

highpriority · track · 39EPSS 0.009 · 61 %ileexploit · functionalEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · functional

Likely / severe?

0.95% (61st) EPSS

CVSS 7.2 · high

Is it mine?

3 products

Check your exposure

Who says so?

2 sources

enisa_euvd · nvd

EPSS · scored 2026-10-27

Stack-based buffer overflow in aswMon2.sys in avast! Home and Professional for Windows 4.8.1351, and possibly other versions before 4.8.1356, allows local users to cause a denial of service (system crash) and possibly gain privileges via a crafted IOCTL request to IOCTL 0xb2c80018.

cvss

Technical severity, 0–10. One row per scoring source.

7.2

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.5–7.2

v2.07.2highAV:L/AC:L/Au:N/C:C/I:C/A:Cprimary · NVD / NIST USexploitability 3.9 · impact 10

v2.06.5mediumAV:L/AC:L/Au:N/C:C/I:C/A:C/E:POCsecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-119USprimary

exploits (1)

Public proof-of-concept and weaponised exploit code.

EDB-10106Avast! 4.8.1351.0 AntiVirus - 'aswMon2.sys' Kernel Memory Corruptionfunctional · exploit_db

affected products (3)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
avast avast antivirus home= 4.8.1351nvdUScpe:2.3:a:avast:avast_antivirus_home:*:*:*:*:*:*:*:*
avast avast antivirus professional= 4.8.1351nvdUScpe:2.3:a:avast:avast_antivirus_professional:*:*:*:*:*:*:*:*

also known as (2)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

enisa_euvd nvd NVD CVE.org MITRE

published 2009-10-01modified 2026-06-16

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+21038 more

references (20)

External citations — patches, advisories, analysis.

scry

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