CVE-2025-70998Network attack vector

Unauthenticated root access via default Telnet credentials

Published Feb 18, 2026 · Updated Feb 18, 2026

Authentication bypass in UTT HiPER 810 / nv810v4 firmware 1.5.0-140603 allows remote attackers to gain root access over Telnet. The Telnet service accepts factory-default credentials for a privileged account without requiring an administrator-changed secret. The service must be network-reachable with its default credentials unchanged; successful login grants control of the router under the root account.

CVSS severity9.8
Critical
EPSS probability0.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in UTT HiPER 810 / nv810v4 firmware 1.5.0-140603 allows remote attackers to gain root access over Telnet. The Telnet service accepts factory-default credentials for a privileged account without requiring an administrator-changed secret. The service must be network-reachable with its default credentials unchanged; successful login grants control of the router under the root account.

The record

CVE
CVE-2025-70998
Published
Feb 18, 2026
Updated
Feb 18, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-1188, T1078.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 18, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1188Initialization of a Resource with an Insecure Default
T1078.001Default Accounts

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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