Buffer overflow in Microsoft Office Compatibility Pack
CVE-2017-11826
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.813 (99.6th percentile), scored .
High probability of exploitation in the next 30 days — patch promptly. 100th percentile — 99.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.812 · newest: 0.813 · change: +0.002
Affected products
- Microsoft Office Compatibility Pack
- Microsoft Office Online Server — versions 2016
- Microsoft Office Web Apps Server — versions 2010, 2013
- Microsoft Office Word Viewer
- Microsoft Sharepoint Enterprise Server — versions 2016
- Microsoft Sharepoint Server — versions 2010, 2013
- Microsoft Word — versions 2007, 2010, 2013
- Microsoft Corporation Office — versions 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 classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
Required action: Apply updates per vendor instructions.
Public proof-of-concept exploits
References
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11826 (Patch, Vendor Advisory)
- 0patch.blogspot.com/2017/11/0patching-pretty-nasty-microsoft-word.html (Exploit)
- www.securityfocus.com/bid/101219 (VDB Entry, Third Party Advisory, vdb-entry, Broken Link)
- www.tarlogic.com/en/blog/exploiting-word-cve-2017-11826/ (Exploit, Third Party Advisory)
- www.securitytracker.com/id/1039541 (VDB Entry, Third Party Advisory, vdb-entry, Broken Link)
- securingtomorrow.mcafee.com/mcafee-labs/analyzing-microsoft-office-zero-day-exp… (Technical Description, Third Party Advisory, Broken Link)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)
Frequently asked questions
- What is CVE-2017-11826?
- CVE-2017-11826 is a high-severity vulnerability in Microsoft Office Compatibility Pack, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.8/10. Published 2017-10-13.
- How severe is CVE-2017-11826?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2017-11826 known to be exploited?
- Yes. CVE-2017-11826 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-03-03), indicating it is being actively exploited. 10 public proof-of-concept repositories are indexed.