CVEs / CVE-2017-11826
CVE-2017-11826: Microsoft Office Remote Code Execution Vulnerability
- Known exploited in the CISA KEV catalog since 3 Mar 2022
- high 7.8 CVSS 3.1 (NVD)
- EPSS 81.3% 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
A remote code execution vulnerability exists in Microsoft Office software when the software fails to properly handle objects in memory. An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the current user.
Description
Microsoft Office 2010, SharePoint Enterprise Server 2010, SharePoint Server 2010, Web Applications, Office Web Apps Server 2010 and 2013, Word Viewer, Word 2007, 2010, 2013 and 2016, Word Automation Services, and Office Online Server allow remote code execution when the software fails to properly handle objects in memory.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| Microsoft Corporation Microsoft Office | Microsoft Office 2010, SharePoint Enterprise Server 2010, SharePoint Server 2010, Web Applications, Office Web Apps Server 2010 and 2013, Word Viewer, Word 2007, 2010, 2013 and 2016, Word Automation Services, Office Online Server. | — |
Exploitation
| In CISA KEV since | 3 Mar 2022 |
|---|---|
| Due date for US federal agencies | 24 Mar 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-2017-11826 on NVD
- CVE-2017-11826 in the CISA KEV catalog
- http://www.securityfocus.com/bid/101219 Broken Link, Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1039541 Broken Link, Third Party Advisory, VDB Entry
- https://0patch.blogspot.com/2017/11/0patching-pretty-nasty-microsoft-word.html Exploit
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11826 Patch, Vendor Advisory
- https://securingtomorrow.mcafee.com/mcafee-labs/analyzing-microsoft-office-zero-day-exploit-cve-2017-11826-memory-corruption-vulnerability/ Broken Link, Technical Description, Third Party Advisory
- https://www.tarlogic.com/en/blog/exploiting-word-cve-2017-11826/ Exploit, Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-11826 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.