CVE-2021-47765

MEDIUM
2026-01-15 [email protected]
5.5
CVSS 3.1
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CVSS Vector

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

3
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

Tags

Denial Of Service Absolutetelnet

Description

AbsoluteTelnet 11.24 contains a denial of service vulnerability that allows local attackers to crash the application by manipulating username and error report fields. Attackers can trigger the crash by inserting 1000 characters into the username or email address fields, causing the application to become unresponsive.

Analysis

AbsoluteTelnet 11.24 contains a denial of service vulnerability that allows local attackers to crash the application by manipulating username and error report fields. [CVSS 5.5 MEDIUM]

Technical Context

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 username and error report fields. Attackers can trigger the crash by inserting 1000 characters into the username or email address fields, causing the application to become unresponsive.

Affected Products

Vendor: Celestialsoftware. Product: Absolutetelnet. Versions: up to 11.24.

Remediation

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

Priority Score

48
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +28
POC: +20

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CVE-2021-47765 vulnerability details – vuln.today
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