Is CVE-2002-1336 in the CISA KEV catalog?

No. CVE-2002-1336 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2002-1336?

CVE-2002-1336 has a CVSS v2 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2002-1336?

CVE-2002-1336 has an EPSS score of 2.40% (82th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2002-1336?

Upgrade tightvnc on debian 11 to 1.2.6-1 or later.

CVE & CISA-KEV Catalog

CVE-2002-1336

HIGHEPSS 82th pctl

7.5

CVSS v2

NVD

Description

TightVNC before 1.2.6 generates the same challenge string for multiple connections, which allows remote attackers to bypass VNC authentication by sniffing the challenge and response of other users.

How to fix

Remediation Available

tightvncDebian

Fixed in:1.2.6-1CVE-2002-1336

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

2.40%probability of exploitation in 30 days

82ndpercentile

Elevated risk: more likely to be exploited than 82% of all known CVEs.

References

Other references9

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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.