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CVE-2021-27852

CISA KEV

Published April 11, 2022 · Updated April 3, 2026

high
Official Description+

Deserialization of Untrusted Data vulnerability in CheckboxWeb.dll of Checkbox Survey allows an unauthenticated remote attacker to execute arbitrary code.

Affected Products

VendorProduct
CheckboxCheckbox Survey

Patch Status

Patch by 2022-05-02

Recommended Actions

  1. Check if your systems use any of the affected products listed above.
  2. Apply vendor patches immediately if available.
  3. This vulnerability is in CISA's Known Exploited Vulnerabilities catalog — prioritize remediation.
  4. Monitor vendor advisories for updates and additional mitigations.
  5. Review logs for indicators of compromise related to CVE-2021-27852.