CVE-2016-3309
Exploitation confirmed. First attested on 2022-03-15 by CISA-ADP, CISA KEV, GCVE · kevintel.
- Published2016-08-09
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
The kernel-mode drivers in Microsoft Windows Vista SP2; Windows Server 2008 SP2 and R2 SP1; Windows 7 SP1; Windows 8.1; Windows Server 2012 Gold and R2; Windows RT 8.1; and Windows 10 Gold, 1511, and 1607 allow local users to gain privileges via a crafted application, aka "Win32k Elevation of Privilege Vulnerability," a different vulnerability than CVE-2016-3308, CVE-2016-3310, and CVE-2016-3311.
Timeline
dates in UTC- 2016-08-0921:59CVE publishedNVD
- 2022-03-15Listed as exploited by GCVEGCVE
- 2022-03-15Exploitation first reportedCISA KEV
- 2022-03-15Added to the CISA KEV catalogCISA KEV
- 2025-02-1016:46SSVC exploitation set to activeCISA-ADP
- 2026-10-2319:23First public proof of conceptPoC-in-GitHub
- 2026-10-2319:23EPSS crossed 10 %FIRST EPSS
Observed activity
isMalicious corpus · updated 2026-10-23 18:48 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2016-3309?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2016-3309?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| — | all versions | no fix published | NVD |
| — | = r2 | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| — | all versions | no fix published | NVD |
| — | = r2 | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| — | all versions | no fix published | NVD |
6 more products in the sources.
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Fix
- CISA’s required action: Apply updates per vendor instructions.due 2022-04-05
Advisories and patches
- docs.microsoft.comPatch · Vendor Advisory
Detection
read 2026-10-23 19:23 UTC- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
CISA Known Exploited Vulnerability
- Date Added
- 2022-03-15
- Patch Due Date
- 2022-04-05
- Ransomware Use
- Known
- Required Action
- Apply updates per vendor instructions.
Sources
- CISA KEVKEV entry2022-03-15
- GCVEexploitation2022-03-15
- CISA-ADPSSVC decisionactive2025-02-10
- OpenCVESSVC decisionactive—
- CISA-ADPCVSS 3.17.82025-02-10
- NVDCVSS 3.17.8read 2026-10-23
- NVDCVSS 2.07.2read 2026-10-23
- FIRST EPSSEPSS score20.5 %read 2026-10-23
- PoC-in-GitHubproof of concept1read 2026-10-23
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Published
- 2016-08-09
- Last Modified
- 2026-06-17
- NVD status
- Analyzed
Frequently asked questions
What is CVE-2016-3309?
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What is the CVSS score for CVE-2016-3309?
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.