AbsoluteTelnet 11.24 - 'Phone' Denial of Service (PoC)
Priority MEDIUM 63CWE-787Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Active
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.
Summary
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.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00194 9th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA and NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Celestialsoftware | AbsoluteTelnet | 11.24 | — | No fix listed | CNA |
- AbsoluteTelnet VendorCelestialsoftware Affected 11.24 Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:celestialsoftware:absolutetelnet:11.24:*:*:*:*:*:*:* | 11.24 | Vulnerable | Celestialsoftware |
- cpe:2.3:a:celestialsoftware:absolutetelnet:11.24:*:*:*:*:*:*:* Versions 11.24 Vulnerable ·Celestialsoftware
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-47764
- 2026-10-03 Alias added: GHSA-g9m3-654m-8943
References
Exploit 1
Other 1
More Celestialsoftware Absolutetelnet vulnerabilities
- TI-2020-19301 AbsoluteTelnet 11.12 - 'SSH2/username' Denial of Service CVSS 4.0MEDIUM 6.9
- TI-2021-22381 AbsoluteTelnet 11.24 - 'Username' Denial of Service (PoC) CVSS 4.0MEDIUM 6.7
- TI-2020-19300 AbsoluteTelnet 11.12 - "license name" Denial of Service CVSS 4.0MEDIUM 6.7
- TI-2020-19299 AbsoluteTelnet 11.12 - "license entry" Denial of Service CVSS 4.0MEDIUM 6.7
Sources
- CVE-2021-47764 · CVE Program
- CVE-2021-47764 · NVD
- FIRST EPSS
- GHSA-g9m3-654m-8943 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences