What is the CVSS score of CVE-2025-70802?

CVE-2025-70802 has a CVSS 3.1 base score of 8.4 (High). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.0%.

How to fix or mitigate CVE-2025-70802?

Within 24 hours: Identify all Tenda G1V3.1si devices in your network and isolate them from production environments or implement emergency network segmentation. Within 7 days: Contact Tenda support for emergency patching information and evaluate replacement hardware if patches remain unavailable. Within 30 days: Complete replacement or retirement of affected devices; if retention is necessary, implement strict network access controls, disable remote management, and deploy continuous network monitoring for suspicious access patterns.

Tenda CVE-2025-70802

HIGH

Use of Hard-coded Password (CWE-259)

2026-03-10 cve@mitre.org

Authentication Bypass Tenda

8.4

CVSS 3.1 · NVD

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Vulnerability Assessment

Weakness	CWE CWE-259 OWASP Top 10:2025 A07:2025 - Authentication Failures ASVS 5.0 V6 - Authentication No hard-coded passwords MITRE ATT&CK 1 technique across 1 tactic: Persistence The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Impact	CVSS 8.4 (HIGH). Attack vector: Local. Complexity: Low. Privileges required: None. User interaction: None.
Exploit ScenarioDerived	An attacker could exploit this vulnerability to log in as root.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).

No patch listed yet 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 12, 2026

Tenda G1V3.1si V16.01.7.8 Firmware V16.01.7.8 was discovered to contain a hardcoded password vulnerability in /etc_ro/shadow, which allows attackers to log in as root. [CVSS 8.4 HIGH]

RemediationAI

Monitor vendor advisories for a patch.

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

Classified as CWE-259 (Use of Hard-coded Password). Tenda G1V3.1si V16.01.7.8 Firmware V16.01.7.8 was discovered to contain a hardcoded password vulnerability in /etc_ro/shadow, which allows attackers to log in as root.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 8.4 HIGH

AV:L/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

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

DescriptionCVE.org

Tenda G1V3.1si V16.01.7.8 Firmware V16.01.7.8 was discovered to contain a hardcoded password vulnerability in /etc_ro/shadow, which allows attackers to log in as root.

Executive ViewAI

Why It Matters

Tenda G1V3.1si routers (firmware V16.01.7.8) contain a hardcoded root password vulnerability that allows unauthenticated remote attackers to gain complete administrative control. Any organization using this router model faces immediate risk of network compromise, data exfiltration, and lateral movement into critical systems. No vendor patch is currently available.

Business Impact: Severe

Compensating Controls

Immediately: Disable remote management interfaces (WAN access) to the router; restrict administrative access to trusted internal networks only using firewall rules. Implement network segmentation to isolate affected routers from critical assets. Deploy intrusion detection/prevention systems (IDS/IPS) configured to alert on suspicious SSH/Telnet access attempts to router management ports. Enable extensive logging and monitoring of all administrative access attempts. Consider deploying a WAF or reverse proxy to block unauthorized management traffic. These are temporary mitigations only; device replacement is the definitive remediation.

Threat Intelligence Overview

EPSS Score

0.0%

Top 95% exploitable

Data Quality

5 sources

Confidence: Medium

NVD

CVE.org

EPSS

GitHub

VulDB

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 HIGH

CISA KEV No

Public POC No

EPSS 0.0%

Patch available No

Active threat No

Deciding rule

HIGH severity (CVSS 7.0-8.9)

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

Scheduled

Exploitation· derived

None

System Exposure· derived

Small

Automatable· derived

Human Impact

Very High

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +42

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Authentication Bypass CRITICAL

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

Affected Products (CPE)CVE.org

cpe:2.3:o:tenda:g1_firmware:16.01.7.8:*:*:*:*:*:*:*

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9.8 May 05

Tenda AC9 v15.03.05.14 was discovered to contain a command injection vulnerability via the Telnet function. Rated critic

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9.8 Mar 14

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9.8 May 02

Tenda AC9 V15.03.06.42_multi was found to contain a command injection vulnerability in the formSetSambaConf function via

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9.8 May 02

Tenda AC9 V15.03.06.42_multi was found to contain a command injection vulnerability in the formsetUsbUnload function via

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9.8 Jul 06

Tenda AC23 v16.03.07.44 was discovered to contain a buffer overflow via fromAdvSetMacMtuWan. Rated critical severity (CV

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9.8 Mar 05

Tenda AC15 v15.03.05.19 is vulnerable to Command Injection via the handler function in /goform/telnet. Rated critical se

CVE-2023-51972 CRITICAL Act Now POC

9.8 Jan 10

Tenda AX1803 v1.0.0.1 was discovered to contain a command injection vulnerability via the function fromAdvSetLanIp. Rate

CVE-2023-51812 CRITICAL Act Now POC

9.8 Jan 04

Tenda AX3 v16.03.12.11 was discovered to contain a remote code execution (RCE) vulnerability via the list parameter at /

CVE-2023-23080 CRITICAL Act Now POC

9.8 Feb 27

Certain Tenda products are vulnerable to command injection. Rated critical severity (CVSS 9.8), this vulnerability is re

Same weakness CWE-259 – Use of Hard-coded Password

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CVE-2015-3306 CRITICAL POC

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CVE-2012-4681 CRITICAL POC

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CVE-2011-3544 CRITICAL POC

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CVE-2022-40684 CRITICAL POC

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CVE-2025-61882 CRITICAL POC

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CVE-2024-0012 CRITICAL POC

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References

Advisories & patches

ADVISORY https://vuldb.com/?id.350212 REF https://github.com/vuln-1/vuln/blob/main/Tenda/G1V3.1si_V16.01.7.8/report-1.md REF https://www.tendacn.com/

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