Critical severity · published Feb 18, 2026
CVE-2025-70998
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…
9.8
CVSS
0.5%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 42% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
8F
810 Firmware · Utt
1.5.0-140603 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-70998
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-70998
Exploit
https://github.com/cha0yang1/UTT-nv810v4-telnet-backdoor
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