Is CVE-1999-0994 in the CISA KEV catalog?

No. CVE-1999-0994 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-1999-0994?

CVE-1999-0994 has a CVSS v2 base score of 5.0 (MEDIUM).

What is the EPSS score for CVE-1999-0994?

CVE-1999-0994 has an EPSS score of 7.19% (94th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix or mitigate CVE-1999-0994?

No published fix for CVE-1999-0994 has been found yet. Check the linked vendor advisories for guidance as it becomes available.

CVE & CISA-KEV Catalog

CVE-1999-0994

MEDIUMEPSS 94th pctl

5.0

CVSS v2

NVD

Description

Windows NT with SYSKEY reuses the keystream that is used for encrypting SAM password hashes, allowing an attacker to crack passwords.

CWE-255

How to fix

No published remediation has been found for this vulnerability's affected products yet.

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

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CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

7.19%probability of exploitation in 30 days

94thpercentile

High risk: more likely to be exploited than 94% of all known CVEs.

References

Other references3

Related Vulnerabilities

Other CWE-255 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2010-0219	High	10.0	90%	-	-
CVE-2013-4786	High	7.5	82%	-	-
CVE-2014-9195	High	10.0	81%	-	-
CVE-2009-3548	High	7.5	79%	-	-
CVE-2009-4189	High	10.0	79%	-	-
CVE-2017-8229	Critical	9.8	74%	-	-

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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 2026-04-16.