CVE-2017-11774
Microsoft Office Outlook Security Feature Bypass Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.
Required action
Apply updates per vendor instructions.
CISA notes
https://nvd.nist.gov/vuln/detail/CVE-2017-11774
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."
Severity
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HExploitation Context
as of October 17, 2026- CISA added CVE-2017-11774 to the KEV catalog 1,482 days after its CVE record was published.
- It is one of 391 Microsoft entries in the CISA KEV catalog, and one of 83 added in 2021.
- Its current EPSS score (59.6%) is higher than that of 53% of CISA KEV entries.
Affected Products
| Vendor | Product | Affected versions |
|---|---|---|
| Microsoft Corporation | Microsoft Corporation Microsoft Outlook | Microsoft Outlook 2010 SP2 Outlook 2013 SP1 and RT SP1 Outlook 2016 |
References
4 LinksRecord Details
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CVE record data © The MITRE Corporation, used under the CVE Terms of Use. Exploited-in-the-wild data from the CISA Known Exploited Vulnerabilities catalog (CC0). Exploit prediction scores by FIRST EPSS (first.org/epss). This site is not endorsed or certified by MITRE, NVD, CISA, or FIRST.