What’s Vulnerable › Vulnerabilities

CVE-2021-47764: AbsoluteTelnet 11.24 - 'Phone' Denial of Service (PoC)

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-01-15 · updated 2026-06-17
• Weakness: CWE-787

Description

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.

Affected products

• Celestial Software AbsoluteTelnet: 11.24

References

• https://www.celestialsoftware.net/
• https://www.exploit-db.com/exploits/50511

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