What is the CVSS score of CVE-2025-70998?

CVE-2025-70998 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.2%.

Is there a public PoC exploit available for CVE-2025-70998?

Yes, a public proof-of-concept exploit is available for CVE-2025-70998. Prioritise patching immediately. EPSS: 0.2%.

How to fix or mitigate CVE-2025-70998?

Within 24 hours: Identify and inventory all UTT HiPER 810/nv810v4 routers running firmware v1.5.0-140603 in your environment; disable external telnet access via firewall rules and disable the telnet service where operationally feasible. Within 7 days: Change default credentials to strong, unique passwords; segment affected routers onto isolated management networks; implement network access controls and monitoring for telnet connections. Within 30 days: Monitor UTT for patch availability and apply immediately upon release; consider replacing affected devices if patches remain unavailable; conduct forensic analysis to detect unauthorized access attempts.

810 Firmware CVE-2025-70998

CRITICAL

Initialization of a Resource with an Insecure Default (CWE-1188)

2026-02-18 cve@mitre.org

Information Disclosure 810 Firmware Utt

9.8

CVSS 3.1 · NVD

View

Vulnerability Assessment

Weakness	CWE CWE-1188 OWASP Top 10:2025 A06:2021 - Vulnerable and Outdated Components ASVS 5.0 V13 - Configuration Secure default settings
Impact	CVSS 9.8, EPSS 0.17%. Router with default credentials and telnet access — trivially exploitable.
Exploit ScenarioDerived	Attacker connects to router's telnet service with default credentials, reconfigures routing, DNS, or enables traffic interception.

Act Now Prioritize within 24-48h. Why: CRITICAL severity + public POC available.

No patch listed yet 0.2% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 12, 2026

Insecure default telnet credentials in UTT HiPER 810 router firmware v1.5.0. Default credentials are publicly known, enabling unauthenticated access to the router management. PoC available.

Earlier versions of this analysis (1)

v1 Mar 12, 2026 - 21:55 CVSS 9.8

Default telnet credentials in UTT HiPER 810 router.

RemediationAI

Change default credentials. Disable telnet in favor of SSH. Update firmware.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

CWE-1188 insecure default initialization. The router ships with known default telnet credentials and may have telnet enabled by default.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 9.8 CRITICAL

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

PoC Detected

Feb 19, 2026 - 18:47 vuln.today

Public exploit code

CVE Published

Feb 18, 2026 - 16:22 nvd

CRITICAL 9.8

DescriptionCVE.org

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.

Executive ViewAI

Why It Matters

UTT HiPER 810 routers with firmware v1.5.0-140603 contain hardcoded default credentials that allow unauthenticated remote attackers to gain root access. This vulnerability affects organizations using these routers for network infrastructure and poses an immediate risk of unauthorized network access, data exfiltration, and lateral movement into critical systems.

Business Impact: Severe

Compensating Controls

Disable telnet service entirely and use SSH-only management where supported; restrict telnet access to specific trusted IP addresses via firewall rules; implement network segmentation to isolate affected routers from critical systems; deploy IDS/IPS rules to detect and block suspicious telnet authentication attempts; enforce strong authentication credentials immediately; implement continuous monitoring and alerting for unauthorized root access attempts; consider temporary device replacement if business continuity permits.

Threat Intelligence Overview

EPSS Score

0.2%

Top 63% exploitable

Exploit

POC

Public exploit code exists

Data Quality

4 sources

Confidence: Medium

NVD

CVE.org

EPSS

GitHub

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity CRITICAL

CISA KEV No

Public POC Yes

EPSS 0.2%

Patch available No

Active threat No

Deciding rule

CRITICAL severity + public POC available

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Out-of-Cycle

Exploitation· derived

Poc

System Exposure· derived

Open

Automatable· derived

Yes

Human Impact

Very High

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +49

PoC: +20

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.