CVE-2016-0099
CVE-2016-0099 is a high-severity vulnerability in Microsoft Windows 10 1507 with a CVSS 3.x base score of 7.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2022-03-03). The underlying weakness is classified as CWE-120.
Key facts
- Severity: High (CVSS 3.x base score 7.8)
- CVSS v2: 7.2
- EPSS exploit prediction: 37% (98th percentile)
- Actively exploited: Yes — listed in CISA KEV (added 2022-03-03)
- EU (EUVD) id: EUVD-2016-0137
- EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2022-03-03)
- Weakness: CWE-120
- Affected product: Microsoft Windows 10 1507
- Published:
- Last modified:
Description
The Secondary Logon Service 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 and 1511 does not properly process request handles, which allows local users to gain privileges via a crafted application, aka "Secondary Logon Elevation of Privilege Vulnerability."
Frequently asked questions
- What is CVE-2016-0099?
- The Secondary Logon Service 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 and 1511 does not properly process request handles, which allows local users to gain privileges via a crafted application, aka "Secondary Logon Elevation of Privilege Vulnerability."
- How severe is CVE-2016-0099?
- CVE-2016-0099 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2016-0099 being actively exploited?
- Yes. CVE-2016-0099 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-03-03, which means active exploitation has been confirmed. It should be prioritised for remediation.
- What products are affected by CVE-2016-0099?
- CVE-2016-0099 primarily affects Microsoft Windows 10 1507. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2016-0099?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
- Does CVE-2016-0099 have an EU (EUVD) identifier?
- Yes. CVE-2016-0099 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2016-0137. It is also flagged as exploited in the EUVD (since 2022-03-03).
- When was CVE-2016-0099 published?
- CVE-2016-0099 was published on 2016-03-09 and last updated on 2026-06-17.
References
- http://www.securityfocus.com/bid/84034
- http://www.securitytracker.com/id/1035210
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2016/ms16-032
- https://www.exploit-db.com/exploits/39574/
- https://www.exploit-db.com/exploits/39719/
- https://www.exploit-db.com/exploits/39809/
- https://www.exploit-db.com/exploits/40107/
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2016-0099
Affected products (9)
- cpe:2.3:o:microsoft:windows_10_1507:-:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_10_1511:-:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_7:-:sp1:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_8.1:-:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_server_2008:r2:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_vista:-:sp2:*:*:*:*:*:*
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