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CVE-2020-1020: Microsoft Windows Adobe Font Manager Library Remote Code Execution Vulnerability

criticalknown exploitedpublic exploitCVE-2020-1020
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 Adobe Font Manager Library contains an unspecified vulnerability when handling specially crafted multi-master fonts (Adobe Type 1 PostScript format) that allows for remote code execution for all systems except Windows 10. For systems running Windows 10, an attacker who successfully exploited the vulnerability could execute code in an AppContainer sandbox context with limited privileges and capabilities.

CSIRTS triage

vendor: Microsoftproduct: WindowsRemote code execution
What
Microsoft Windows Adobe Font Manager Library contains an unspecified vulnerability that allows for remote code execution when handling specially crafted multi-master fonts.
Who is affected
All systems running Microsoft Windows except Windows 10 are affected by this vulnerability.
Urgency
Immediate remediation is necessary due to active exploitation and critical severity.
Action
Install the latest security updates for Microsoft Windows to mitigate this vulnerability.

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-2020-1020

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-2020-1020coverage & exploitation statusNVD · CVE.org

Recent advisories for Microsoft Windows Adobe

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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