CVE-2019-19101 | Incomplete communication encryption and validation in B&R Automation Studio upgrade service

A missing secure communication definition and an incomplete TLS validation in the upgrade service in B&R Automation Studio versions 4.0.x, 4.1.x, 4.2.x, < 4.3.11SP, < 4.4.9SP, < 4.5.5SP, < 4.6.4 and < 4.7.2 enable unauthenticated users to perform MITM attacks via the B&R upgrade server.

Published: 2020-04-29 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2019-19101 is rated Moderate Risk (40.3/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.52%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2019-19101

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.07% 0.52% +0.45%
2 2023-03-07 0.89% 0.07% -0.82%
3 2022-04-01 — 0.89% —

Full EPSS history (6 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2019-19101

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.5 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N)
Service keeps running; no real outage angle.
 2.8 3.6 [email protected]
5.9 3.1 MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N)
Service keeps running; no real outage angle.
 2.2 3.6 [email protected]
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2019-19101

Affected software / configurations for CVE-2019-19101

Vendor Product Version Raw CPE
br-automation automation_studio >= 4.0, <= 4.0.29.87 cpe:2.3:a:br-automation:automation_studio:*:*:*:*:*:*:*:*
br-automation automation_studio >= 4.1, <= 4.1.17.113 cpe:2.3:a:br-automation:automation_studio:*:*:*:*:*:*:*:*
br-automation automation_studio >= 4.2, <= 4.2.14.119 cpe:2.3:a:br-automation:automation_studio:*:*:*:*:*:*:*:*
br-automation automation_studio >= 4.3, < 4.3.11 cpe:2.3:a:br-automation:automation_studio:*:*:*:*:*:*:*:*
br-automation automation_studio >= 4.4, < 4.4.9 cpe:2.3:a:br-automation:automation_studio:*:*:*:*:*:*:*:*
br-automation automation_studio >= 4.5, < 4.5.5 cpe:2.3:a:br-automation:automation_studio:*:*:*:*:*:*:*:*
br-automation automation_studio >= 4.6, < 4.6.4 cpe:2.3:a:br-automation:automation_studio:*:*:*:*:*:*:*:*
br-automation automation_studio >= 4.7, < 4.7.2 cpe:2.3:a:br-automation:automation_studio:*:*:*:*:*:*:*:*

References for CVE-2019-19101

cvelogic Threat Intelligence