Security readout for executives and security teams
Plain-English summary
AbsoluteTelnet 11.24 can be crashed through oversized input in local username or error-report fields. The known impact is denial of service to the application, not data theft or system takeover. Public proof-of-concept information exists, but the provided sources do not show active exploitation.
Executive priority
Treat as a targeted availability issue, not a broad enterprise compromise risk. Prioritize if AbsoluteTelnet supports critical operations or is used on shared workstations.
Technical view
CVE-2021-47765 affects Celestialsoftware AbsoluteTelnet 11.24. The record describes a local, low-complexity denial-of-service condition requiring user interaction, with high application availability impact. The bundled CVSS v4.0 score is 6.7. The weakness is mapped to CWE-787, but the public detail provided is limited to application crash behavior.
Likely exposure
Exposure is limited to systems running AbsoluteTelnet 11.24 where a local user can interact with the affected fields. Internet-facing exposure is not indicated by the provided sources.
Exploitation context
ExploitDB is cited as containing proof-of-concept material. CISA KEV is false in the provided bundle, and no cited source states active exploitation in the wild.
Researcher notes
Public details are sparse beyond the affected version, local crash condition, and ExploitDB reference. No vendor advisory or fixed version is identified in the provided sources.
Mitigation direction
- Identify any installations of AbsoluteTelnet 11.24.
- Check Celestialsoftware guidance for a fixed or supported version.
- Upgrade or replace the software if vendor guidance identifies a safe release.
- Limit use of the application on shared or untrusted local systems.
- Avoid processing untrusted input in the affected local fields.
Validation and detection
- Confirm installed AbsoluteTelnet versions on managed endpoints.
- Prioritize systems where multiple local users can access the application.
- Review endpoint crash reports for repeated AbsoluteTelnet failures.
- Monitor vendor and CVE records for updated remediation details.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-787: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2021-47765 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.7 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N——Primary CVE scoreVulnerability scoring details
Base CVSS 4.0 score
6.7MediumVector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Source materials
- CVE List V5 sourceCVE List V5
- ExploitDB-50510CVE reference · exploit
- Vendor HomepageCVE reference · product
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Out-of-bounds Write
Out-of-bounds Write represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.