CVEs / CVE-2017-11774
CVE-2017-11774: Microsoft Office Outlook Security Feature Bypass Vulnerability
- Known exploited in the CISA KEV catalog since 3 Nov 2021
- high 7.8 CVSS 3.1 (NVD)
- EPSS 59.6% chance of exploitation in the next 30 days, higher than 99% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
Microsoft Office Outlook contains a security feature bypass vulnerability due to improperly handling objects in memory. Successful exploitation allows an attacker to execute commands.
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."
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| Microsoft Corporation Microsoft Outlook | Microsoft Outlook 2010 SP2 | — |
| Microsoft Corporation Microsoft Outlook | Outlook 2013 SP1 and RT SP1 | — |
| Microsoft Corporation Microsoft Outlook | Outlook 2016 | — |
Exploitation
| In CISA KEV since | 3 Nov 2021 |
|---|---|
| Due date for US federal agencies | 3 May 2022 |
| Used in ransomware campaigns | Unknown |
| Required action | Apply updates per vendor instructions. |
Severity
| CVSS 3.1 | 7.8 highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HScored by NVD |
|---|---|
| Weakness | CWE-119 |
References
- CVE-2017-11774 on NVD
- CVE-2017-11774 in the CISA KEV catalog
- http://www.securityfocus.com/bid/101098 Broken Link, Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1039542 Broken Link, Third Party Advisory, VDB Entry
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11774 Patch, 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-2017-11774 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.