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Vulnerability record · CVE-2025-70998 · published 18 February 2026

CVE-2025-70998: Utt 810 firmware insecure default initialization vulnerability

UUtt · 810 Firmware

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.

9.8 CVSS 3.1 Critical EPSS 0.44% · top 64.2% CWE-1188 · Insecure default initialization
9.8CVSS 3.1 base score
0.44%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References, 1 tagged exploit
17 Jun 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/cha0yang1/UTT-nv810v4-telnet-backdoor ExploitThird Party Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2025-70998), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.