CISA KEV · Known exploitedHigh

CVE-2017-11774

Microsoft Office

Microsoft Outlook 2010 SP2, Outlook 2013 SP1 and RT SP1, and Outlook 2016 allow an attacker to execute arbitrary commands, due to how Microsoft Office handles objects in memory, aka "Microsoft Outlook Security Feature Bypass Vulnerability."

CVSS
7.8
EPSS
59.9%
99.0% percentile
CISA KEV
Listed
Published
2017.10.13
PRIORITY ASSESSMENT

Immediate review

CISA has listed this vulnerability in the Known Exploited Vulnerabilities catalog.

Known exploitationConfirmed by CISA KEV
Exploit probability59.9%
Technical severityCVSS 7.8

Vulnerability overview

Microsoft Outlook 2010 SP2, Outlook 2013 SP1 and RT SP1, and Outlook 2016 allow an attacker to execute arbitrary commands, due to how Microsoft Office handles objects in memory, aka "Microsoft Outlook Security Feature Bypass Vulnerability."

Affected product and versions

Product
Microsoft Office
Affected versions
Microsoft Outlook 2010 SP2, Outlook 2013 SP1 and RT SP1, Outlook 2016, 2010, 2013, 2016
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
CISA required action

Apply updates per vendor instructions.

Due date: 2022.05.03
  1. 1
    Identify

    Confirm that Microsoft Office and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE
CWE-119
KEV added
2021.11.03
Ransomware use
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