CVE-2021-27664
No exploitation reported by the sources we read.
- Published2021-10-11
- WeaknessCWE-269
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
Under certain configurations an unauthenticated remote user could be given access to credentials stored in the exacqVision Server.
Timeline
dates in UTC- 2021-10-1116:15CVE 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-2021-27664?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-27664?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 |
|---|---|---|---|
| 20.6 | ≤ 20.06.11.0 | no fix published | 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 exacqVision Server Bundle
exacqVision Web Service: Version 21.06.11.0 or older
Fix
- Vendor fix CISA ICSA-21-280-01 · 1 productUpgrade exacqVision Web Service to Version 21.09
- Mitigation from the vendor CISA ICSA-21-280-01 · 1 productFor more detailed mitigation instructions, please see Johnson Controls Product Security Advisory JCI-PSA-2021-16 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:H/A:H
- Published
- 2021-10-11
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2021-27664?
Is CVE-2021-27664 actively exploited?
What is the CVSS score for CVE-2021-27664?
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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.