How severe is CVE-2017-7909?

CVE-2017-7909 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2017-7909 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-7909?

CVE-2017-7909 affects Advantech B+b Smartworx Mesr901 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-7909?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2017-7909 published?

CVE-2017-7909 was published on 2017-05-06 and last updated on 2026-06-17.

CVE-2017-7909

CVE-2017-7909 is a critical-severity vulnerability in Advantech B+b Smartworx Mesr901 Firmware with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-287.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 3% (84th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Advantech B+b Smartworx Mesr901 Firmware
Published: 2017-05-06
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2017-7909?: 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 severe is CVE-2017-7909?: CVE-2017-7909 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2017-7909 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-7909?: CVE-2017-7909 affects Advantech B+b Smartworx Mesr901 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-7909?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2017-7909 published?: CVE-2017-7909 was published on 2017-05-06 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:advantech_b\+b_smartworx:mesr901_firmware:*:*:*:*:*:*:*:*

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