What is the CVSS score of CVE-2025-70327?

CVE-2025-70327 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: 2.0%.

Is there a public PoC exploit available for CVE-2025-70327?

Yes, a public proof-of-concept exploit is available for CVE-2025-70327. Prioritise patching immediately. EPSS: 2.0%.

How to fix or mitigate CVE-2025-70327?

Within 24 hours: Inventory all TOTOLINK X5000R deployments and isolate affected devices to segregated network segments. Within 7 days: Implement network access controls restricting /usr/sbin/lighttpd handler access, deploy WAF rules blocking setDiagnosisCfg requests, and disable the affected diagnostic feature if operationally feasible. Within 30 days: Evaluate replacement hardware, establish automated monitoring for exploitation attempts, and conduct threat assessment for potentially compromised systems.

X5000r Firmware CVE-2025-70327

CRITICAL

Improper Neutralization of Argument Delimiters in a Command ('Argument Injection') (CWE-88)

2026-02-23 cve@mitre.org

Denial Of Service X5000r Firmware TOTOLINK

9.8

CVSS 3.1 · NVD

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Vulnerability Assessment

Weakness	CWE CWE-88 OWASP Top 10:2025 A05:2025 - Injection ASVS 5.0 V1 - Encoding and Sanitization Argument sanitization
Impact	CVSS 9.8, EPSS 2.0%. TOTOLINK routers are regularly targeted by botnets (Mirai variants).
Exploit ScenarioDerived	Attacker injects additional arguments into diagnostic commands, achieving code execution on the router.

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

No patch listed yet 2.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 12, 2026

Argument injection in TOTOLINK X5000R router v9.1.0cu via setDiagnosisCfg handler allows unauthenticated remote code execution. EPSS 2.0% with PoC available.

Earlier versions of this analysis (1)

v1 Mar 12, 2026 - 21:55 CVSS 9.8

Argument injection in TOTOLINK X5000R router diagnostic handler.

RemediationAI

Update router firmware. Disable remote management.

Affects your stack

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Technical ContextAI · show details

CWE-88 argument injection in setDiagnosisCfg. Similar to CVE-2026-3301 in TOTOLINK N300RH — systematic vulnerability across the TOTOLINK product line.

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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 26, 2026 - 03:06 vuln.today

Public exploit code

CVE Published

Feb 23, 2026 - 21:19 nvd

CRITICAL 9.8

DescriptionCVE.org

TOTOLINK X5000R v9.1.0cu_2415_B20250515 contains an argument injection vulnerability in the setDiagnosisCfg handler of the /usr/sbin/lighttpd executable. The ip parameter is retrieved via websGetVar and passed to a ping command through CsteSystem without validating if the input starts with a hyphen (-). This allows remote authenticated attackers to inject arbitrary command-line options into the ping utility, potentially leading to a Denial of Service (DoS) by causing excessive resource consumption or prolonged execution.

Executive ViewAI

Why It Matters

TOTOLIK X5000R routers (v9.1.0cu_2415_B20250515) contain a critical vulnerability enabling remote attackers to execute arbitrary commands with a 9.8 CVSS score. Organizations operating this router model face immediate risk of network compromise, data exfiltration, and lateral movement into internal systems. No vendor patch is currently available, requiring urgent mitigation measures.

Business Impact: Severe

Compensating Controls

Disable the setDiagnosisCfg diagnostic functionality if not business-critical; implement network segmentation isolating router management interfaces; deploy WAF/IDS signatures to block setDiagnosisCfg handler requests; restrict administrative access to router web interface via IP whitelisting and multi-factor authentication; monitor for suspicious diagnostic configuration requests in logs; disable remote management capabilities if not required.

Threat Intelligence Overview

EPSS Score

2.0%

Top 16% 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 2.0%

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: +2

CVSS: +49

PoC: +20

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Denial of Service MEDIUM

Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.

Affected Products (CPE)CVE.org

cpe:2.3:o:totolink:x5000r_firmware:9.1.0cu.2415_b20250515:*:*:*:*:*:*:*

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TOTOLINK X5000R V9.1.0u.6118_B20201102 and V9.1.0u.6369_B20230113 contains a command insertion vulnerability in setDiagn

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