CVE-2021-36198
No exploitation reported by the sources we read.
- Published2021-12-06
- Fixed in8.40
- WeaknessCWE-200 · CWE-668
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
Successful exploitation of this vulnerability could allow an unauthorized user to access sensitive data.
Timeline
dates in UTC- 2021-12-0617:15CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 18:48 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-36198?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-36198?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 8.40 | < 8.40 | 8.40 | NVD |
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Distribution builds and vendor advisories
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Vendor advisories
Johnson Controls Entrapass
Entrapass: All versions prior to 8.40
Fix
- Update Johnsoncontrols kantech entrapass to 8.40
- Vendor fix CISA ICSA-21-336-02 · 1 productJohnson Controls recommends users upgrade Entrapass to Version 8.40
- Mitigation from the vendor CISA ICSA-21-336-02 · 1 productFor more detailed mitigation instructions, please see Johnson Controls Product Security Advisory JCI-PSA-2021-22 v1
Advisories and patches
- us-cert.govMitigation
- www.johnsoncontrols.comVendor Advisory
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- Published
- 2021-12-06
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2021-36198?
Is CVE-2021-36198 actively exploited?
What is the CVSS score for CVE-2021-36198?
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Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.