Is CVE-1999-1324 in the CISA KEV catalog?

No. CVE-1999-1324 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-1999-1324?

CVE-1999-1324 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-1999-1324?

CVE-1999-1324 has an EPSS score of 3.09% (86th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix or mitigate CVE-1999-1324?

No published fix for CVE-1999-1324 has been found yet. Check the linked vendor advisories for guidance as it becomes available.

CVE & CISA-KEV Catalog

CVE-1999-1324

CRITICALEPSS 86th pctl

9.8

CVSS v3

NVD

Description

VAXstations running Open VMS 5.3 through 5.5-2 with VMS DECwindows or MOTIF do not properly disable access to user accounts that exceed the break-in limit threshold for failed login attempts, which makes it easier for attackers to conduct brute force password guessing.

CWE-307

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 v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

3.09%probability of exploitation in 30 days

86thpercentile

Elevated risk: more likely to be exploited than 86% of all known CVEs.

References

Patch1

ciac.llnl.gov

Third-Party Advisory1

exchange.xforce.ibmcloud.com

Related Vulnerabilities

Other CWE-307 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2019-17240	Critical	9.8	40%	-	-
CVE-2023-29301	High	7.5	32%	-	-
CVE-2023-22960	High	7.5	28%	-	Fix
CVE-2020-15906	Critical	9.8	27%	-	Fix
CVE-2016-9361	Critical	9.8	20%	-	-
CVE-2024-39225	Critical	9.8	15%	-	-

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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.