CVE-2022-4291

criticalpriority · track · 40EPSS 0.004 · 39 %ileDEEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.45% (39th) EPSS

CVSS 10 · critical

Is it mine?

3 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-27

The aswjsflt.dll library from Avast Antivirus windows contained a potentially exploitable heap corruption vulnerability that could enable an attacker to bypass the sandbox of the application it was loaded into, if applicable. This issue was fixed in version 18.0.1478 of the Script Shield Component.

cvss

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

10.0

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 7.7–10

v3.110criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 6

v3.17.7highAV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:Lsecondary · FSTEC (BDU) RU

v3.17.7highCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:Lsecondary · ENISA EU

v3.17.7highCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:Lsecondary · security@nortonlifelock.comexploitability 1.1 · impact 6

v3.19.1criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-787USprimaryCWE-119USCWE-119USCWE-122USCWE-427US

affected products (3)

Products and version ranges known to be affected.

Avast Antivirus≤ 0 ≤18.0.1473.0enisa_euvdEU
Avast Software sro Script Shield≤ 18.0.1473.0fstec_bduRU
avast script shield≤ 18.0.1473.0nvdUScpe:2.3:a:avast:script_shield:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2022-2261Avast Antivirus: Schwachstelle ermöglicht Denial of ServiceDeutsch2022-12-07csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Avast Antivirus ausnutzen, um einen Denial of Service Angriff auf den Mozilla Firefox Browser durchzuführen.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd cert_bund NVD CVE.org MITRE

published 2022-12-08modified 2026-06-17

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+16125 more

references (7)

External citations — patches, advisories, analysis.

scry

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