CVE-2025-65288: mr816 Buffer Overflow — Exploit

Description

A buffer overflow in the Mercury MR816v2 (081C3114 4.8.7 Build 110427 Rel 36550n) occurs when the device accepts and stores excessively long hostnames from LAN hosts without proper length validation. The affected code performs unchecked copies/concatenations into fixed-size buffers. A crafted long hostname can overflow the buffer, cause a crash (DoS) and potentially enabling remote code execution.

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CVSS v3.1 Score

6.5

MEDIUM

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

Weakness Type (CWE)

CWE-120 CWE-120

Affected Products

Vendor	Product	Versions
mercurycom	mr816_firmware	All
mercurycom	mr816	All

References

Exploits

https://damiri.fr/en/cve/CVE-2025-65288

Frequently Asked Questions

What is CVE-2025-65288? +

A buffer overflow in the Mercury MR816v2 (081C3114 4.8.7 Build 110427 Rel 36550n) occurs when the device accepts and stores excessively long hostnames from LAN hosts without proper length validation. The affected code performs unchecked copies/concatenations into fixed-size buffers. A crafted long hostname can overflow the buffer, cause a crash (DoS) and potentially enabling remote code execution. It has a CVSS v3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2025-65288? +

CVE-2025-65288 has a CVSS v3.1 score of 6.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-65288? +

CVE-2025-65288 affects products from mercurycom, specifically: mr816, mr816_firmware. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-65288? +

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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