CVE-2023-1617

9.8 CRITICAL 0.7% exploit odds Fix listed Auth & access Device

What it is

Improper Authentication vulnerability in B&R Industrial Automation B&R VC4 (VNC-Server modules). This vulnerability may allow an unauthenticated network-based attacker to bypass the authentication mechanism of the VC4 visualization on affected devices. The impact of this vulnerability depends on the functionality provided in the visualization. This issue affects B&R VC4: from 3.* through 3.96.7, from 4.0* through 4.06.7, from 4.1* through 4.16.3, from 4.2* through 4.26.8, from 4.3* through 4.34.6, from 4.4* through 4.45.1, from 4.5* through 4.45.3, from 4.7* through 4.72.9.

At a glance

Exploitability: Can be exploited over the network without logging in. High risk of data exposure, data tampering, service disruption.
Exploit odds: 0.7% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2023-04-14 12:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-17 05:28 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 0.7% in the next 30 days (EPSS).
Severity: 9.8 CRITICAL (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2023-04-14 12:15 UTC
Last modified: 2026-06-17 05:28 UTC
Exploit probability: 0.7% · EPSS, next 30 days
Weakness: CWE-287 · Improper authentication
Record status: Modified

Affected

br-automation vc4 < 3.96.8
br-automation vc4 ≤ 4.06.4
br-automation vc4 ≤ 4.16.3
br-automation vc4 ≤ 4.26.8
br-automation vc4 < 4.34.7
br-automation vc4 ≤ 4.45.1
br-automation vc4 ≤ 4.53.0
br-automation vc4 < 4.73.0

Attack profile CVSS 3.1 · 9.8

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: High

Raw vector

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

Is it in your code?

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Fix and advisories

References

NVD record · CVE.org record