Is CVE-2020-37133 in the CISA KEV catalog?

No. CVE-2020-37133 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-37133?

CVE-2020-37133 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2020-37133?

CVE-2020-37133 has an EPSS score of 0.48% (38th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2020-37133

HIGH

7.5

CVSS v3

NVD

Description

UltraVNC Launcher 1.2.4.0 contains a denial of service vulnerability in the Repeater Host configuration field that allows attackers to crash the application. Attackers can paste an overly long string of 300 characters into the Repeater Host property to trigger an application crash.

CWE-121 CWE-787Out-of-bounds Write

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

0.48%probability of exploitation in 30 days

38thpercentile

Low risk: more likely to be exploited than 38% 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 2026-02-09.