Is CVE-2009-0388 in the CISA KEV catalog?

No. CVE-2009-0388 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2009-0388?

CVE-2009-0388 has a CVSS v2 base score of 10.0 (HIGH).

What is the EPSS score for CVE-2009-0388?

CVE-2009-0388 has an EPSS score of 13.33% (96th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2009-0388

HIGHEPSS 96th pctl

10.0

CVSS v2

NVD

Description

Multiple integer signedness errors in (1) UltraVNC 1.0.2 and 1.0.5 and (2) TightVnc 1.3.9 allow remote VNC servers to cause a denial of service (heap corruption and application crash) or possibly execute arbitrary code via a large length value in a message, related to the (a) ClientConnection::CheckBufferSize and (b) ClientConnection::CheckFileZipBufferSize functions in ClientConnection.cpp.

CWE-189

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

13.33%probability of exploitation in 30 days

96thpercentile

Very high risk: more likely to be exploited than 96% 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 2026-04-23.