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    CVE-2021-47764

    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.

    Published:Jan 15, 2026
    Last Modified:Feb 18, 2026
    EPS:Jan 15, 2026
    EPSS Score:0.00006
    CVSS Score:5.5

    Affected Products

    Vendor
    Celestial Software
    Product
    Absolutetelnet
    Vendor
    Celestialsoftware
    Product
    Absolutetelnet

    Exploits

    https://www.exploit-db.com/exploits/50511

    Common Weakness Enumeration

    CWE-787 Out-of-bounds Write

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2020-37166 (CVSS 6.9) — AbsoluteTelnet 11.12 contains a denial of service vulnerability in the SSH2 username input field that allows l…
    CVE-2020-37165 (CVSS 6.7) — AbsoluteTelnet 11.12 contains a denial of service vulnerability that allows local attackers to crash the appli…
    CVE-2020-37164 (CVSS 6.7) — AbsoluteTelnet 11.12 contains a denial of service vulnerability that allows local attackers to crash the appli…
    CVE-2021-47765 (CVSS 6.7) — AbsoluteTelnet 11.24 contains a denial of service vulnerability that allows local attackers to crash the appli…
    CVE-2003-1090 (CVSS 10) — Buffer overflow in AbsoluteTelnet before 2.12 RC10 allows remote attackers to execute arbitrary code via a lon…
    CVE-2003-0046 (CVSS 4.6) — AbsoluteTelnet SSH2 client does not clear logon credentials from memory, including plaintext passwords, which …

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High