CVEs / CVE-2021-27852
CVE-2021-27852: Checkbox Survey Deserialization of Untrusted Data Vulnerability
- Known exploited in the CISA KEV catalog since 11 Apr 2022
- critical 9.8 CVSS 3.1 (NVD)
- EPSS 30.2% chance of exploitation in the next 30 days, higher than 98% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
Deserialization of Untrusted Data vulnerability in CheckboxWeb.dll of Checkbox Survey allows an unauthenticated remote attacker to execute arbitrary code.
Description
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 and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| Checkbox Survey | from unspecified, before 7 | 7 |
Exploitation
| In CISA KEV since | 11 Apr 2022 |
|---|---|
| Due date for US federal agencies | 2 May 2022 |
| Used in ransomware campaigns | Unknown |
| Required action | 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. |
Severity
| CVSS 3.1 | 9.8 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HScored by NVD |
|---|---|
| Weakness | CWE-502 |
References
- CVE-2021-27852 on NVD
- CVE-2021-27852 in the CISA KEV catalog
- https://www.kb.cert.org/vuls/id/706695 Third Party Advisory, US Government Resource
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-27852 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.