CVE-2017-11774

Name: CVE-2017-11774
Creator: NVD / NIST
Published: 2017-10-13T13:29:00.427+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10Actively ExploitedEPSS 59.89%

Last modified Jun 17, 2026

CVE-2017-11774 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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.". CISA has confirmed active exploitation in the wild. EPSS estimates a 59.89% chance of exploitation in the next 30 days.

Description

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."

Metrics

CVSS 3.1

7.8/10

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Probability

59.89%

99.0th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by May 3, 2022.

Weakness Enumeration

Affected Software

Vendor	Product	Versions	Update
Microsoft	Outlook	2010	Sp2
Microsoft	Outlook	2013	Sp1
Microsoft	Outlook	2016	—

References

http://www.securityfocus.com/bid/101098Broken Link, Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1039542Broken Link, Third Party Advisory, VDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11774Patch, Vendor Advisory
https://sensepost.com/blog/2017/outlook-home-page-another-ruler-vector/Exploit
http://www.securityfocus.com/bid/101098Broken Link, Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1039542Broken Link, Third Party Advisory, VDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11774Patch, Vendor Advisory
https://sensepost.com/blog/2017/outlook-home-page-another-ruler-vector/Exploit
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-11774US Government Resource

Timeline

Published: Oct 13, 2017
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2017-11774?

How severe is CVE-2017-11774?

CVE-2017-11774 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 59.89% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2017-11774?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-11774?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST