PatchSiren cyber security CVE debrief

CVE-2026-0647 Rockwell Automation CVE debrief

CVE-2026-0647 is an improper authentication security issue within the 1794-AENTR adapter's embedded web server. The vulnerability allows an unauthenticated attacker to change the device's web interface password by sending a crafted HTTP GET request to a specific endpoint, without any prior authentication being required. If exploited, this could lead to unauthorized access, account takeover, and loss of the device’s embedded web server’s availability.

Vendor: Rockwell Automation
Product: 1794-AENTR Adapter
CVSS: HIGH 8.8
CISA KEV: Not listed in stored evidence
Original CVE published: 2026-06-16
Original CVE updated: 2026-06-16
Advisory published: 2026-06-16
Advisory updated: 2026-06-16

Who should care

Users of the 1794-AENTR adapter, particularly those in industrial automation settings, should be aware of this vulnerability and take steps to mitigate it.

Technical summary

The vulnerability has a CVSS score of 8.8 and is classified as HIGH severity. It is related to CWE-306, which involves improper authentication.

Defensive priority

HIGH

Recommended defensive actions

Apply patches or updates as recommended by the vendor.
Restrict access to the embedded web server.
Monitor for suspicious activity.

Evidence notes

The CVE record was published on 2026-06-16T15:16:33.687Z and modified on 2026-06-16T15:26:04.250Z. The vendor is listed as Unknown Vendor, but there is a reference to Rockwell Automation.

Official resources

CVE-2026-0647 was published on 2026-06-16T15:16:33.687Z.