What is the CVSS score of CVE-2021-47764?

CVE-2021-47764 has a CVSS 3.1 base score of 5.5 (Medium). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 0.0%.

Which versions of Absolutetelnet are affected by CVE-2021-47764?

Organizations using AbsoluteTelnet 11.24 should be aware of moderate risk from CVE-2021-47764, a out-of-bounds write vulnerability rated CVSS 5.5.

Is there a public PoC exploit available for CVE-2021-47764?

Yes, a public proof-of-concept exploit is available for CVE-2021-47764. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2021-47764?

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

Absolutetelnet CVE-2021-47764

MEDIUM

Out-of-bounds Write (CWE-787)

2026-01-15 disclosure@vulncheck.com

Denial Of Service Absolutetelnet

5.5

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

5.5 MEDIUM

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

PoC Detected

Jan 26, 2026 - 16:15 vuln.today

Public exploit code

CVE Published

Jan 15, 2026 - 16:16 nvd

MEDIUM 5.5

DescriptionCVE.org

AbsoluteTelnet 11.24 contains a denial of service vulnerability that allows local attackers to crash the application by manipulating DialUp connection and license name fields. Attackers can generate a 1000-character payload and paste it into specific input fields to trigger application crashes and force unexpected termination.

AnalysisAI

AbsoluteTelnet 11.24 contains a denial of service vulnerability that allows local attackers to crash the application by manipulating DialUp connection and license name fields. [CVSS 5.5 MEDIUM]

Technical ContextAI

Classified as CWE-787 (Out-of-bounds Write). Affects Absolutetelnet. AbsoluteTelnet 11.24 contains a denial of service vulnerability that allows local attackers to crash the application by manipulating DialUp connection and license name fields. Attackers can generate a 1000-character payload and paste it into specific input fields to trigger application crashes and force unexpected termination.

RemediationAI

Monitor vendor advisories for a patch. Enable ASLR, DEP/NX, and stack canaries where possible.

CVE-2021-47764 vulnerability details – vuln.today

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Absolutetelnet CVE-2021-47764

Severity by source

CVSS VectorNVD

Lifecycle Timeline

DescriptionCVE.org

AnalysisAI

Technical ContextAI

RemediationAI

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External POC / Exploit Code