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CVE-2021-34448: Microsoft Windows Scripting Engine Memory Corruption Vulnerability

criticalknown exploitedCVE-2021-34448
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
Microsoft Windows Scripting Engine contains an unspecified vulnerability that allows for memory corruption.

CSIRTS triage

vendor: Microsoftproduct: Windows Scripting EngineMemory corruption
What
Microsoft Windows Scripting Engine contains an unspecified vulnerability that allows for memory corruption.
Who is affected
Deployments of Microsoft Windows Scripting Engine.
Urgency
Remediation is urgent due to active exploitation and critical severity.
Action
Apply the latest security patches from Microsoft.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2021-11-03
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2021-34448

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2021-34448coverage & exploitation statusNVD · CVE.org

Recent advisories for Microsoft Windows Scripting

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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