Is CVE-2016-0099 in the CISA KEV catalog?

Yes. CVE-2016-0099 is on the CISA Known Exploited Vulnerabilities list, added 2022-03-03, and has known ransomware campaign use.

What is the CVSS severity of CVE-2016-0099?

CVE-2016-0099 has a CVSS v3 base score of 7.8 (HIGH).

What is the EPSS score for CVE-2016-0099?

CVE-2016-0099 has an EPSS score of 37.16% (98th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix or mitigate CVE-2016-0099?

No published fix for CVE-2016-0099 has been found yet. It is on the CISA Known Exploited Vulnerabilities list; federal agencies must remediate by 2022-03-24. Apply the vendor's mitigations per CISA's guidance.

CVE & CISA-KEV Catalog

CVE-2016-0099

HIGHCISA KEVEPSS 98th pctl

7.8

CVSS v3

NVD

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."

CWE-120Classic Buffer Overflow

How to fix

Actively exploited, no published fix found yet

CISA required action: Apply updates per vendor instructions.

Federal remediation due: 2022-03-24

Known ransomware campaign use

Mitigation guidance may be in the linked vendor advisories in the References section below.

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CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

37.16%probability of exploitation in 30 days

98thpercentile

Very high risk: more likely to be exploited than 98% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

Microsoft Windows Secondary Logon Service Privilege Escalation Vulnerability

A privilege escalation vulnerability exists in Microsoft Windows if the Windows Secondary Logon Service fails to properly manage request handles in memory. An attacker who successfully exploited this vulnerability could run arbitrary code as an administrator.

Apply updates per vendor instructions.

Remediation due: 2022-03-24

Associated with ransomware campaigns

References

Patch1

docs.microsoft.com

Exploit4

Third-Party Advisory2

Government Resource1

cisa.gov

Related Vulnerabilities

Other CWE-120 (Classic Buffer Overflow) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2014-0195	Medium	6.8	100%	-	Fix
CVE-2017-7269	Critical	9.8	100%	KEV	-
CVE-2019-11043	High	8.7	99%	KEV + Ransom	Fix
CVE-2011-4862	High	10.0	95%	-	Fix
CVE-2007-5659	High	7.8	94%	KEV	Fix
CVE-2022-3786	High	7.5	92%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-22.