CVE-2017-0283Lync Vulnerability
Uniscribe in Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, Windows 10 Gold, 1511, 1607, Windows Server 2016, Microsoft Office 2007 SP3, Microsoft Office 2010 SP2, Microsoft Office Word Viewer, Microsoft Lync 2013…
Published Jun 14, 2017 · Updated May 12, 2026
Key Facts
Patch immediately- CVE-2017-0283 is a high-severity vulnerability (CVSS 8.8 v3) affecting Lync (Microsoft), Office (Microsoft), Office Word Viewer (Microsoft) and 9 more products.
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 39% 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 public exploit code exists for a high-severity flaw.
Scores
CVSS v3
8.8
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
39%
Higher than 98.5% of all scored CVEs
Exploit maturity
Proof of concept
ATLAS score
38/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Not listed
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Proof of concept
Public exploit code
1
Proof-of-concept links
In-the-wild evidence
0
Reports of active use
Advisories And Exploit References
Description
Uniscribe in Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, Windows 10 Gold, 1511, 1607, Windows Server 2016, Microsoft Office 2007 SP3, Microsoft Office 2010 SP2, Microsoft Office Word Viewer, Microsoft Lync 2013 SP1, Skype for Business 2016, Microsoft Silverlight 5 Developer Runtime when installed on Microsoft Windows, and Microsoft Silverlight 5 when installed on Microsoft Windows allows a remote code execution vulnerability due to the way it handles objects in memory, aka "Windows Uniscribe Remote Code Execution Vulnerability".
This CVE ID is unique from CVE-2017-8528.
Affected Products
19 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| LyncMicrosoft | 2013-sp1 | n/a |
| OfficeMicrosoft | 2007-sp3, 2010-sp2 | n/a |
| Office Word ViewerMicrosoft | See advisory | n/a |
| SilverlightMicrosoft | 5.0 | n/a |
| Skype For BusinessMicrosoft | 2016 | n/a |
Timeline
Publicly disclosed
Jun 14, 2017
Last updated
May 12, 2026
References
- advisory98920
- patchportal.msrc.microsoft.com · CVE-2017-0283
- exploitExploitDB-42234
- other0patch.blogspot.com · 0patching-quick-brown-fox-of-cve-2017.html
- otherbugs.chromium.org · issues
FAQ
Common Questions.
Uniscribe in Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, Windows 10 Gold, 1511, 1607, Windows Server 2016, Microsoft Office 2007 SP3, Microsoft Office 2010 SP2, Microsoft Office Word Viewer, Microsoft Lync 2013 SP1, Skype for Business 2016, Microsoft…
Affected: Lync (Microsoft) versions 2013-sp1; Office (Microsoft) versions 2007-sp3, 2010-sp2; Office Word Viewer (Microsoft), 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 public exploit code exists for a high-severity flaw.
Is CVE-2017-0283 On Your Attack Surface?
Brandefense matches it against the products discovered on your perimeter and opens a finding the day a CVE like this is listed.
Request A Demo