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CVE-2019-7594

22
FAUCET Score

CVE-2019-7594 describes a critical vulnerability in Johnson Controls Metasys ADS/ADX servers and NAE/NIE/NCE engines prior to version 9.0, where a hardcoded RC2 key is used for encryption operations within the Site Management Portal (SMP). This flaw carries a CVSS score of 9.1 (Critical) due to its network-based attack vector, low attack complexity, and high impact on confidentiality and integrity, allowing unauthorized access to sensitive information. Despite its severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 9.0CPE matchmatch criteria
cpe:2.3:a:johnsoncontrols:metasys_system:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.8MEDIUM

CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
1.6
Impact Score
5.2
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.63%
Probability of exploitation in next 30 days
EPSS Percentile
46.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0063 is in the 28th percentile among its peer group of 36,897 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

johnsoncontrols.com / -/media/jci/cyber-solutions/product-security-advisories/2019/jci-psa-2019-06-v1-metasys-icsa-19-227-01.pdf
Vendor Advisory
us-cert.gov / ics/advisories/icsa-19-227-01
MitigationThird Party AdvisoryUS Government Resource