CVE-2017-11826 kev in the critical feed json
Microsoft Office 2010, SharePoint Enterprise Server 2010, SharePoint Server 2010, Web Applications, Office Web Apps Server 2010 and 2013, W…
published 2017-10-13 9 y ago modified 2026-06-17 4 mo ago also EUVD-2017-3426
- cvss
- 7.8
- version 3.1, CNA
- cisa kev
- Exploited
- added 2022-03-03
- epss
- 82.2%
- EPSS 82.2% chance of exploitation in 30 days, percentile 99.6%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
cisa required action Apply updates per vendor instructions.
Timeline
- Found exploited as a 0-day (Project Zero)
- 0-day patched (Project Zero)
- Published
- Added to CISA KEV
- CISA patch deadline
- CISA SSVC: exploitation active
Known exploited
- Added
- 4 y ago
- Patch by
- 2022-03-24 (4 y ago)
- Ransomware
- Not known
- Required action
- Apply updates per vendor instructions.
- Vendor, product
- Microsoft, Office
- CISA name
- Microsoft Office Remote Code Execution Vulnerability
Zero-day
Detected in real attacks while still unknown to the vendor and the public, per Google Project Zero's 0day In-the-Wild tracker.
- Found
- 2017-09-28
- Patched
- 2017-10-10
- Details
- project zero tracker
CISA SSVC
- Exploitation
- Active, exploited in the wild
- Automatable
- no
- Technical impact
- total
- Assessed
- 20 mo ago
Exploit prediction
82.22% chance of exploitation in the next 30 days, higher than 99.6% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- 0patch.blogspot.com https://0patch.blogspot.com/2017/11/0patching-pretty-nasty-microsoft-word.html referenced PoC, tagged "exploit" by a source, unverified
- tarlogic.com https://www.tarlogic.com/en/blog/exploiting-word-cve-2017-11826/ referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| NVD | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| CNA | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 9.3 | AV:N/AC:M/Au:N/C:C/I:C/A:C |
Affected products
- Microsoft Corporation Microsoft Office
Classification
- Weakness
-
- CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
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
-
tarlogic.com
/en/blog/exploiting-word-cve-2017-11826/
exploit, third-party-advisory
-
securityfocus.com
/bid/101219
vdb-entry, broken-link, third-party-advisory
-
securitytracker.com
/id/1039541
vdb-entry, broken-link, third-party-advisory
-
securingtomorrow.mcafee.com
/mcafee-labs/analyzing-microsoft-office-zero-day-exploit-cve-2017-11826-memory-corruption-vulnerability/
broken-link, technical-description, third-party-advisory
-
cisa.gov
/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-11826
government-resource, us-government-resource
Sources
- CVE List CVE-2017-11826
- NVD CVE-2017-11826
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.