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CVE-2023-1617

30
FAUCET Score

CVE-2023-1617 is an Improper Authentication vulnerability in B&R Industrial Automation B&R VC4 (VNC-Server modules), affecting various versions across the 3.x to 4.7x series. This critical vulnerability (CVSS 9.8) allows an unauthenticated network-based attacker to bypass the authentication mechanism of the VC4 visualization, potentially leading to high impact on confidentiality, integrity, and availability depending on the system's functionality. Currently, 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
< 3.96.8CPE matchmatch criteria
cpe:2.3:a:br-automation:vc4:*:*:*:*:*:*:*:*
>= 4.0.0, <= 4.06.4CPE matchmatch criteria
cpe:2.3:a:br-automation:vc4:*:*:*:*:*:*:*:*
>= 4.10.0, <= 4.16.3CPE matchmatch criteria
cpe:2.3:a:br-automation:vc4:*:*:*:*:*:*:*:*
>= 4.20.0, <= 4.26.8CPE matchmatch criteria
cpe:2.3:a:br-automation:vc4:*:*:*:*:*:*:*:*
>= 4.30.0, < 4.34.7CPE matchmatch criteria
cpe:2.3:a:br-automation:vc4:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.72%
Probability of exploitation in next 30 days
EPSS Percentile
50.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0072 is in the 33rd percentile among its peer group of 36,862 CVEs.

Social Chatter

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

br-automation.com / downloads_br_productcatalogue/assets/1681046878970-en-original-1.0.pdf
Vendor Advisory