Is CVE-2021-45337 in the CISA KEV catalog?

No. CVE-2021-45337 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-45337?

CVE-2021-45337 has a CVSS v3 base score of 8.8 (HIGH).

What is the EPSS score for CVE-2021-45337?

CVE-2021-45337 has an EPSS score of 0.43% (35th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-45337?

Upgrade antivirus to 20.8 or later.

CVE & CISA-KEV Catalog

CVE-2021-45337

HIGH

8.8

CVSS v3

NVD

Description

Privilege escalation vulnerability in the Self-Defense driver of Avast Antivirus prior to 20.8 allows a local user with SYSTEM privileges to gain elevated privileges by "hollowing" process wsc_proxy.exe which could lead to acquire antimalware (AM-PPL) protection.

How to fix

Remediation Available

antivirusNVD

Affected:< 20.8Fixed in:20.8CVE-2021-45337derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeChanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

0.43%probability of exploitation in 30 days

35thpercentile

Low risk: more likely to be exploited than 35% of all known CVEs.

References

Exploit1

github.com

Vendor Advisory1

avast.com

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.