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CVE-2021-27665

24
FAUCET Score

CVE-2021-27665 describes a denial-of-service vulnerability affecting Johnson Controls exacqVision Server. An unauthenticated remote attacker can exploit a potential integer overflow with a specially crafted script. This vulnerability has a CVSS score of 7.5 (HIGH), indicating easy exploitation over the network with no user interaction required, leading to high availability impact. There is currently no public exploit code available, it is not listed on CISA's KEV catalog, and it has received minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
>= 21.06.11.0, <= 21.06.11.0CPE match
cpe:2.3:a:johnsoncontrols:exacqvision_web_service:*:*:*:*:*:*:*:*
<= 21.06.11.0CPE matchmatch criteria
cpe:2.3:a:johnsoncontrols:exacqvision_server:*:*:*:*:*:*:x86:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.48%
Probability of exploitation in next 30 days
EPSS Percentile
71.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0148 is in the 53rd percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (5)

asteriskvendor investigatingvia llm_extracted
ciscovendor investigatingvia llm_extracted
miniovendor investigatingvia llm_extracted
opensshvendor investigatingvia llm_extracted
railsvendor investigatingvia llm_extracted

Vendor Advisories (5)

opensshllm-openssh-fb06247396858465CRITICAL

Johnson Controls exacqVision Multiple Vulnerabilities

Oct 8, 2021
railsllm-rails-294ce69ace7adfcdCRITICAL

Johnson Controls exacqVision Multiple Vulnerabilities

Oct 8, 2021
miniollm-minio-71f592c8ecee200fCRITICAL

Johnson Controls exacqVision Multiple Vulnerabilities

Oct 8, 2021
ciscollm-cisco-3b9ac007b6a4e2e7CRITICAL

Johnson Controls exacqVision Multiple Vulnerabilities

Oct 8, 2021
asteriskllm-asterisk-d697be23daf45ff8CRITICAL

Johnson Controls exacqVision Multiple Vulnerabilities

Oct 8, 2021

References

us-cert.gov / ics/advisories/icsa-21-280-03
MitigationThird Party AdvisoryUS Government Resource
johnsoncontrols.com / cyber-solutions/security-advisories
Vendor Advisory