A stored Cross site scripting (XSS) vulnerability in the Mercury MR816v2 (081C3114 4.8.7 Build 110427 Rel 36550n) router allows a remote attacker on the LAN to inject JavaScript into the router's management UI by submitting a malicious hostname. The injected script is stored and later executed in the context of an administrator's browser (for example after DHCP release/renew triggers the interface to display the stored hostname). Because the management interface uses weak/basic authentication and does not properly protect or isolate session material, the XSS can be used to exfiltrate the admin session and perform administrative actions.
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Fixes

Solution

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Workaround

No workaround given by the vendor.

References
History

Fri, 12 Dec 2025 14:45:00 +0000

Type Values Removed Values Added
First Time appeared Mercurycom
Mercurycom mr816
Mercurycom mr816 Firmware
CPEs cpe:2.3:h:mercurycom:mr816:2.0:*:*:*:*:*:*:*
cpe:2.3:o:mercurycom:mr816_firmware:081c3114_4.8.7:build_110427:*:*:*:*:*:*
Vendors & Products Mercurycom
Mercurycom mr816
Mercurycom mr816 Firmware

Wed, 10 Dec 2025 21:45:00 +0000

Type Values Removed Values Added
First Time appeared Mercury
Mercury mr816v2
Vendors & Products Mercury
Mercury mr816v2

Wed, 10 Dec 2025 21:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-79
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 09 Dec 2025 16:45:00 +0000

Type Values Removed Values Added
Description A stored Cross site scripting (XSS) vulnerability in the Mercury MR816v2 (081C3114 4.8.7 Build 110427 Rel 36550n) router allows a remote attacker on the LAN to inject JavaScript into the router's management UI by submitting a malicious hostname. The injected script is stored and later executed in the context of an administrator's browser (for example after DHCP release/renew triggers the interface to display the stored hostname). Because the management interface uses weak/basic authentication and does not properly protect or isolate session material, the XSS can be used to exfiltrate the admin session and perform administrative actions.
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2025-12-10T21:04:27.804Z

Reserved: 2025-11-18T00:00:00.000Z

Link: CVE-2025-65289

cve-icon Vulnrichment

Updated: 2025-12-10T21:04:02.581Z

cve-icon NVD

Status : Analyzed

Published: 2025-12-09T17:15:55.727

Modified: 2025-12-12T14:31:38.323

Link: CVE-2025-65289

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2025-12-10T21:33:33Z

Weaknesses