CVE-2017-7909
CRITICALEPSS 84th pctlDescription
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.
How to fix
No published remediation has been found for this vulnerability's affected products yet.
Mitigation guidance may be in the linked vendor advisories in the References section below.
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CVSS v3 Vector
Exploitability
Impact
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploit Intelligence
Elevated risk: more likely to be exploited than 84% of all known CVEs.
References
Related Vulnerabilities
Other CWE-603 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2022-3218 | Critical | 9.8 | 73% | - | - |
| CVE-2020-6988 | High | 7.5 | 4.0% | - | - |
| CVE-2020-7591 | High | 8.8 | 1.5% | - | Fix |
| CVE-2022-33139 | Critical | 9.8 | 1.2% | - | - |
| CVE-2021-43355 | High | 7.3 | 1.0% | - | Fix |
| CVE-2025-24517 | High | 7.5 | 0.8% | - | - |
Common questions
How do I fix CVE-2017-7909?
No published fix for CVE-2017-7909 has been found yet. Check the linked vendor advisories for guidance as it becomes available.
Is CVE-2017-7909 being actively exploited?
Not that we know of. CVE-2017-7909 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 2.6% is the estimated probability that it will be exploited in the next 30 days. That is higher than 84% of all scored CVEs.
How severe is CVE-2017-7909?
CVE-2017-7909 has a CVSS v3 base score of 9.8, rated critical. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-13.