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%.

Which versions of 810 Firmware are affected by CVE-2025-70998?

UTT HiPER 810 routers with firmware v1.5.0-140603 contain hardcoded default credentials that allow unauthenticated remote attackers to gain root access.

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

9.8

CVSS 3.1 · NVD

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

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:55 vuln.today

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.

AnalysisAI

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.