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CVE-2017-11774: Microsoft Office Outlook Security Feature Bypass Vulnerability

criticalknown exploitedpublic exploitCVE-2017-11774
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 Office Outlook contains a security feature bypass vulnerability due to improperly handling objects in memory. Successful exploitation allows an attacker to execute commands.

CSIRTS triage

vendor: Microsoftproduct: Office OutlookAuthentication bypass
What
Microsoft Office Outlook contains a security feature bypass vulnerability due to improperly handling objects in memory.
Who is affected
Users of Microsoft Office Outlook.
Urgency
Immediate action is required as the vulnerability is actively exploited and rated critical.
Action
Update Microsoft Office Outlook to the latest version.

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-2017-11774

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-2017-11774coverage & exploitation statusNVD · CVE.org

Recent advisories for Microsoft Office Outlook

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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