CVE-2026-39431: Command Injection (CVSS 7.2)

Description

On HP Poly EagleEye Cube USB 1.3.1-001267 devices, one of the API functions available on a management service accessible via USB allows command injection. This allows attackers (without administrator-level access) to execute arbitrary commands on the device as root. This is due to insufficient input validation that allows an attacker to control part of the CSR certificate generation process. This provides full root access that permits full control over device operations, unauthorized access to data, and the ability to place a persistent backdoor on the device (which could operate via the Ethernet port).

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CVSS v3.1 Score

7.2

HIGH

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

EPSS — Exploit Prediction

0.0102

Probability of exploitation

0.64%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-77 CWE-77

References

Other References

https://docs.poly.com/bundle/eagleeye-cube-usb-ug-1-3-0/page/t2821658.html https://github.com/thackeraaron/polycom_research/blob/main/CVE-2026-39430_and_CVE-2026-39431.md https://support.hp.com/rs-en/product/product-specs/g7500-kit-series/model/2102186752

Frequently Asked Questions

What is CVE-2026-39431? +

On HP Poly EagleEye Cube USB 1.3.1-001267 devices, one of the API functions available on a management service accessible via USB allows command injection. This allows attackers (without administrator-level access) to execute arbitrary commands on the device as root. This is due to insufficient input validation that allows an attacker to control part of the CSR certificate generation process. This provides full root access that permits full control over device operations, unauthorized access to data, and the ability to place a persistent backdoor on the device (which could operate via the Ethernet port). It has a CVSS v3.1 base score of 7.2 (HIGH).

How severe is CVE-2026-39431? +

CVE-2026-39431 has a CVSS v3.1 score of 7.2 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0102, placing it in the 1th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-39431? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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