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CVE-2024-21413: Microsoft Outlook Improper Input Validation Vulnerability

criticalknown exploitedpublic exploitCVE-2024-21413
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 Outlook contains an improper input validation vulnerability that allows for remote code execution. Successful exploitation of this vulnerability would allow an attacker to bypass the Office Protected View and open in editing mode rather than protected mode.

CSIRTS triage

vendor: Microsoftproduct: OutlookRemote code executionOther
What
Microsoft Outlook contains an improper input validation vulnerability that allows for remote code execution.
Who is affected
Users of Microsoft Outlook with affected versions.
Urgency
Immediate action is required due to active exploitation and critical severity.
Action
Install the latest security updates for Microsoft Outlook.

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
2025-02-06
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2024-21413

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-2024-21413coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

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