CVE-2016-3357
HighPublic exploitMicrosoft Office 2007 SP3, Office 2010 SP2, Office 2013 SP1, Office 2013 RT SP1, Office 2016, Word for Mac 2011, Word 2016 for Mac, Word Viewer, Word Automation Services on SharePoint Server 2010 SP2, SharePoint Server 2013 SP1, Excel Automation Services on SharePoint Server…
Published Sep 14, 2016 · Updated Oct 15, 2026
Key Facts
Patch immediately- CVE-2016-3357 is a high-severity vulnerability (CVSS 7.8 v3) affecting Office (Microsoft), Office Web Apps (Microsoft), Office Web Apps Server (Microsoft) and 3 more products.
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 55% probability of exploitation in the next 30 days.
- No fixed version is listed yet; check the vendor advisory for mitigations.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v3
7.8
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
55%
Higher than 99.0% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
Available
Proof-of-concept or weaponized module
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Description
Microsoft Office 2007 SP3, Office 2010 SP2, Office 2013 SP1, Office 2013 RT SP1, Office 2016, Word for Mac 2011, Word 2016 for Mac, Word Viewer, Word Automation Services on SharePoint Server 2010 SP2, SharePoint Server 2013 SP1, Excel Automation Services on SharePoint Server 2013 SP1, Word Automation Services on SharePoint Server 2013 SP1, Office Web Apps 2010 SP2, and Office Web Apps Server 2013 SP1 allow remote attackers to execute arbitrary code via a crafted document, aka "Microsoft Office Memory Corruption Vulnerability."
Affected Products
11 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| OfficeMicrosoft | 2007-sp3, 2010-sp2, 2013-sp1, 2016 | n/a |
| Office Web AppsMicrosoft | 2010-sp2 | n/a |
| Office Web Apps ServerMicrosoft | 2013-sp1 | n/a |
| Sharepoint FoundationMicrosoft | 2010-sp2, 2013-sp1 | n/a |
| Word For MacMicrosoft | 2011, 2016 | n/a |
Timeline
Publicly disclosed
Sep 14, 2016
Last updated
Oct 15, 2026
Weakness Type
- CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
References
- exploitExploitDB-40406
- otherMS16-107
- other40406
- other92786
- other1036785
FAQ
Common Questions.
Microsoft Office 2007 SP3, Office 2010 SP2, Office 2013 SP1, Office 2013 RT SP1, Office 2016, Word for Mac 2011, Word 2016 for Mac, Word Viewer, Word Automation Services on SharePoint Server 2010 SP2, SharePoint Server 2013 SP1, Excel Automation Services on SharePoint Server 2013 SP1, Word Automation Services on Share…
Affected: Office (Microsoft) versions 2007-sp3, 2010-sp2, 2013-sp1, 2016; Office Web Apps (Microsoft) versions 2010-sp2; Office Web Apps Server (Microsoft) versions 2013-sp1, among others. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
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