# CVE-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.

- Page: https://www.vulneraibility.com/cve/CVE-2021-27852
- CVSS: 9.8
- Known exploited: yes, in CISA KEV since 2022-04-11; CISA due date 2022-05-02
- EPSS: 30.26% (percentile 98.3)
- CISA SSVC: exploitation active, automatable yes, technical impact total (assessed 2025-02-06)
- Weakness: CWE-502
- Published: 2021-05-27

## Affected versions

- Checkbox Survey: affected < 7

A version outside these ranges is not a statement that it is unaffected.

## References

- [other] https://www.kb.cert.org/vuls/id/706695
- [other] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-27852

---
Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.