What is the CVSS score of CVE-2020-37132?

CVE-2020-37132 has a CVSS 3.1 base score of 6.2 (Medium). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N. EPSS exploitation probability: 0.0%.

Which versions of Ultravnc are affected by CVE-2020-37132?

Organizations using UltraVNC Launcher 1.2.4.0 should be aware of moderate risk from CVE-2020-37132, a stack-based buffer overflow vulnerability rated CVSS 6.2.

Is there a public PoC exploit available for CVE-2020-37132?

Yes, a public proof-of-concept exploit is available for CVE-2020-37132. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2020-37132?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

Ultravnc CVE-2020-37132

MEDIUM

Stack-based Buffer Overflow (CWE-121)

2026-02-05 disclosure@vulncheck.com

Denial Of Service Ultravnc

6.2

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

6.2 MEDIUM

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:55 vuln.today

PoC Detected

Feb 09, 2026 - 22:08 vuln.today

Public exploit code

CVE Published

Feb 05, 2026 - 17:16 nvd

MEDIUM 6.2

DescriptionCVE.org

UltraVNC Launcher 1.2.4.0 contains a denial of service vulnerability in its password configuration properties that allows local attackers to crash the application. Attackers can paste an overly long 300-character string into the password field to trigger an application crash and prevent normal launcher functionality.

AnalysisAI

UltraVNC Launcher 1.2.4.0 contains a denial of service vulnerability in its password configuration properties that allows local attackers to crash the application. [CVSS 6.2 MEDIUM]

Technical ContextAI

Classified as CWE-121 (Stack-based Buffer Overflow). Affects Ultravnc. UltraVNC Launcher 1.2.4.0 contains a denial of service vulnerability in its password configuration properties that allows local attackers to crash the application. Attackers can paste an overly long 300-character string into the password field to trigger an application crash and prevent normal launcher functionality.

RemediationAI

Monitor vendor advisories for a patch.

CVE-2020-37132 vulnerability details – vuln.today

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Ultravnc CVE-2020-37132

Severity by source

CVSS VectorNVD

Lifecycle Timeline

DescriptionCVE.org

AnalysisAI

Technical ContextAI

RemediationAI

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External POC / Exploit Code