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CVE-2025-70998

CriticalCVSS 9.8/10Last modified Jun 17, 2026

Description

UTT HiPER 810 / nv810v4 router firmware v1.5.0-140603 was discovered to contain insecure default credentials for the telnet service, possibly allowing a remote attacker to gain root access via a crafted script.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

https://github.com/cha0yang1/UTT-nv810v4-telnet-backdoorExploit, Third Party Advisory

Timeline

Published: Feb 18, 2026
Last modified: Jun 17, 2026
NVD status: Analyzed

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CVE-2025-70998: Critical severity, CVSS 9.8 | Vulnix