Is CVE-2003-0818 in the CISA KEV catalog?

No. CVE-2003-0818 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2003-0818?

CVE-2003-0818 has a CVSS v2 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2003-0818?

CVE-2003-0818 has an EPSS score of 84.01% (100th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2003-0818

HIGHEPSS 100th pctl

7.5

CVSS v2

NVD

Description

Multiple integer overflows in Microsoft ASN.1 library (MSASN1.DLL), as used in LSASS.EXE, CRYPT32.DLL, and other Microsoft executables and libraries on Windows NT 4.0, 2000, and XP, allow remote attackers to execute arbitrary code via ASN.1 BER encodings with (1) very large length fields that cause arbitrary heap data to be overwritten, or (2) modified bit strings.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

84.01%probability of exploitation in 30 days

100thpercentile

Very high risk: more likely to be exploited than 100% of all known CVEs.

References

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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.