PatchTheCVECVE-2017-7909: A Use of Client-Side Authentication issue was discovered in Advantech B+B SmartWorx MESR901 firmware versions
CVE-2017-7909 is a critical-severity flaw (CVSS 9.8) affecting mesr901 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
A Use of Client-Side Authentication issue was discovered in Advantech B+B SmartWorx MESR901 firmware versions 1.5.2 and prior. The web interface uses JavaScript to check client authentication and redirect unauthorized users. Attackers may intercept requests and bypass authentication to access restricted web pages.
Why this priority
- Critical severity
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2017-7909?
mesr901 firmware: upgrade to newer than 1.5.2. Exact commands for each OS are on this page.
Is CVE-2017-7909 being exploited?
CVE-2017-7909 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2017-7909 affect?
CVE-2017-7909 affects mesr901 firmware. Severity is critical (CVSS 9.8). A Use of Client-Side Authentication issue was discovered in Advantech B+B SmartWorx MESR901 firmware versions 1.5.2 and prior. The web interface uses JavaScript to check client authentication and redirect unauthorized users. Attackers may i
How urgent is CVE-2017-7909?
Priority 61/100. Critical severity; Remotely exploitable, no login, no user action