Security readout for executives and security teams
CVE-2021-42110 lets a standard user gain SYSTEM-level control on affected Allegro Windows installations when the FTP module is installed. That turns a limited foothold into full Windows compromise on the host. Public source data does not show active exploitation. Exposure is most likely on Windows systems running Allegro Windows or Popsy Windows earlier than 3.3.4156.1 with the FTP module installed. Organizations without this software, without the FTP module, or already on a non-affected version are less likely exposed. Treat as a targeted high-priority remediation item where Allegro Windows is present. The business risk is full host takeover after limited access, but scope may be narrow because exposure depends on a specific product version and FTP module. Mitigation focus: Inventory Allegro Windows and Popsy Windows installations across managed Windows hosts.; Confirm whether the FTP module is installed or enabled.; Upgrade to 3.3.4156.1 or later where vendor guidance supports it..
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
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ATT&CK lookup starting points
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CVE-2021-42110 mapping review
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Open ATT&CK lookup- Severity
- High
- CVSS
- 7.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AC:L/AV:A/A:N/C:H/I:L/PR:N/S:U/UI:N
CNA and ADP enrichment extracted from CVE v5
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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:3.1/AC:L/AV:A/A:N/C:H/I:L/PR:N/S:U/UI:N2.84.2Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.1HighVector: CVSS:3.1/AC:L/AV:A/A:N/C:H/I:L/PR:N/S:U/UI:N
Source materials
- CVE List V5 sourceCVE List V5
- https://excellium-services.com/cert-xlm-advisory/CVE-2021-42110CVE reference
- https://cds.thalesgroup.com/en/tcs-cert/CVE-2021-42110CVE reference
Products and packages named in the record
CWE details
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