Buffer overflow in Mercurycom Mr816
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.004 (31.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 31st percentile — 31.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000
Affected products
- Mercurycom Mr816 — versions 2.0
- Mercurycom Mr816 Firmware — versions 081c3114_4.8.7
Weakness classification (CWE)
References
- damiri.fr/en/cve/CVE-2025-65288 (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2025-65288?
- CVE-2025-65288 is a medium-severity vulnerability in Mercurycom Mr816, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 6.5/10. Published 2025-12-09.
- How severe is CVE-2025-65288?
- Medium severity. CVSS v3 base score is 6.5 out of 10.