CVE-2019-7594

mediumpriority · track · 36OT risk · elevatedEPSS 0.006 · 50 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.63% (50th) EPSS

CVSS 6.4 · medium

Is it mine?

3 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cisa_csaf_ot · nvd

EPSS · scored 2026-10-27

Metasys® ADS/ADX servers and NAE/NIE/NCE engines prior to 9.0 make use of a hardcoded RC2 key for certain encryption operations involving the Site Management Portal (SMP).

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

No vendor fix yet; a mitigation is available.

MitigationMetasys systemcisa_csaf_ot
Users should upgrade to Version 9.0 or later and configure sites with trusted certificates.

cvss

Technical severity, 0–10. One row per scoring source.

9.1

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–critical · 6.4–9.1

v2.06.4mediumAV:N/AC:L/Au:N/C:P/I:P/A:Nprimary · NVD / NIST USexploitability 10 · impact 4.9

v3.09.1criticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 5.2

v3.06.8mediumCVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:Nsecondary · CISA US

v3.06.8mediumCVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:Nsecondary · ENISA EU

v3.06.8mediumCVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:Nsecondary · productsecurity@jci.comexploitability 1.6 · impact 5.2

v3.08.3highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-798USprimaryCWE-321USCWE-321US

affected products (3)

Products and version ranges known to be affected.

Metasys system: versions prior to 9.0all versionscisa_csaf_otUS
Johnson Controls Inc Metasys system< 9.0cisa_csaf_otUS
johnsoncontrols metasys system< 9.0nvdUScpe:2.3:a:johnsoncontrols:metasys_system:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

ICSA-19-227-01Johnson Controls Metasys2019-08-15icsa · cisa_csaf_otUS
Successful exploitation of these vulnerabilities could be leveraged by an attacker to decrypt captured network traffic.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cisa_csaf_ot nvd NVD CVE.org MITRE

published 2019-08-20modified 2026-06-17

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+2276 more

references (9)

External citations — patches, advisories, analysis.

scry

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