Actively exploited · Published Oct 13, 2017 · Assigned by microsoft
CVE-2017-11826
High 7.8 Exploited
In plain English
A high-severity memory corruption in Microsoft Office from Microsoft Corporation. Attackers are actively exploiting it in the wild (listed by CISA on March 3, 2022). The chance it is exploited in the next 30 days is estimated at 81.3% (higher than 99.6% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Apply updates per vendor instructions.
CISA guidance
Apply updates per vendor instructions.
Federal agencies must remediate by Mar 24, 2022.
Official 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 products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| 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. |
Weakness: CWE-119 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
References
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11826 x_refsource_CONFIRM
- https://0patch.blogspot.com/2017/11/0patching-pretty-nasty-microsoft-word.html x_refsource_MISC
- 101219 vdb-entry, x_refsource_BID
- https://www.tarlogic.com/en/blog/exploiting-word-cve-2017-11826/ x_refsource_MISC
- 1039541 vdb-entry, x_refsource_SECTRACK
- https://securingtomorrow.mcafee.com/mcafee-labs/analyzing-microsoft-office-zero-day-exploit-cve-2017-11826-memory-corruption-vulnerability/ x_refsource_MISC
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-11826 government-resource