CVE-2021-27852

Timeline

Detection, updates, and resolution for this record.

1. May 27, 2021 · Catalog

   Detected

   Deserialization of Untrusted Data vulnerability in CheckboxWeb.dll of Checkbox Survey allows an unauthenticated remote attacker to execute arbitrary code. This issue affects: Checkbox Survey versions prior to 7.

2. Apr 11, 2022 · CISA KEV

   Known exploited

   Versions 6 and earlier for this product are end-of-life and must be removed from agency networks. Versions 7 and later are not considered vulnerable.

3. May 2, 2022 · CISA KEV

   Remediation due

   Versions 6 and earlier for this product are end-of-life and must be removed from agency networks. Versions 7 and later are not considered vulnerable.

4. Jun 16, 2026 · Catalog

   Updated

   Deserialization of Untrusted Data vulnerability in CheckboxWeb.dll of Checkbox Survey allows an unauthenticated remote attacker to execute arbitrary code. This issue affects: Checkbox Survey versions prior to 7.

Affected

• cpe checkbox/surveyversion unspecified
• vendor Checkbox Checkbox Surveyversion unspecified

Sources

• CISA KEVCVE-2021-27852

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

  cisa.gov
• CVE.orgCVE-2021-27852

  Official CVE identifier

  cve.org
• FIRST EPSSCVE-2021-27852

  30-day exploitation probability 30.3%

  first.org
• NIST NVDCVE-2021-27852

  Deserialization of Untrusted Data vulnerability in CheckboxWeb.dll of Checkbox Survey allows an unauthenticated remote attacker to execute arbitrary code. This issue affects: Checkbox Survey versions prior to 7.

  nvd.nist.gov

References

• CISA note · nvd.nist.gov
• US Government Resource · cisa.gov
• Third Party Advisory · kb.cert.org