What is the CVSS score of CVE-2020-25499?

CVE-2020-25499 has a CVSS 3.1 base score of 8.8 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 4.2%.

Is there a public PoC exploit available for CVE-2020-25499?

Yes, a public proof-of-concept exploit is available for CVE-2020-25499. Prioritise patching immediately. EPSS: 4.2%.

Is there a patch available for CVE-2020-25499?

Yes, a patch is available for CVE-2020-25499. Update the affected software to the latest version immediately.

A3002r Firmware CVE-2020-25499

HIGH

OS Command Injection (CWE-78)

2020-12-09 cve@mitre.org

Command Injection A3002r Firmware N150rt Firmware N302r Plus Firmware TOTOLINK N300Rt Firmware N300Rh V3 Firmware A3002Ru V1 Firmware A3002Ru V2 Firmware A702R V2 Firmware A702R V3 Firmware N100Re V3 Firmware N200Re V3 Firmware N200Re V4 Firmware N210Re Firmware

8.8

CVSS 3.1 · NVD

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Vulnerability Assessment

Weakness	CWE CWE-78 OWASP Top 10:2025 A05:2025 - Injection ASVS 5.0 V1 - Encoding and Sanitization OS command sanitization, avoid shell exec MITRE ATT&CK 2 techniques across 1 tactic: Execution 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 score of 8.8 (HIGH). Attack characteristics: network attack vector, low complexity, low privileges required, no user interaction not required. Public proof-of-concept exploit code is available.
Exploit ScenarioDerived	A remote attacker could execute arbitrary operating system commands on the host by sending crafted requests to the affected application.

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

Patch available 4.2% exploitation probability (EPSS)

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AnalysisAI

TOTOLINK A3002RU-V2.0.0 B20190814.1034 allows authenticated remote users to modify the system's 'Run Command'. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Avoid passing user input to shell commands. Use language-specific APIs instead of shell execution. Apply strict input validation with allowlists.

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

This vulnerability is classified as OS Command Injection (CWE-78), which allows attackers to execute arbitrary operating system commands on the host. TOTOLINK A3002RU-V2.0.0 B20190814.1034 allows authenticated remote users to modify the system's 'Run Command'. An attacker can use this functionality to execute arbitrary OS commands on the router. Affected products include: Totolink A3002R Firmware, Totolink A3002Ru-V1 Firmware, Totolink A3002Ru-V2 Firmware, Totolink A702R-V2 Firmware, Totolink A702R-V3 Firmware.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 8.8 HIGH

AV:N/AC:L/PR:L/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

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

DescriptionNVD

TOTOLINK A3002RU-V2.0.0 B20190814.1034 allows authenticated remote users to modify the system's 'Run Command'. An attacker can use this functionality to execute arbitrary OS commands on the router.

Threat Intelligence Overview

EPSS Score

4.2%

Top 10% exploitable

Exploit

POC

Public exploit code exists

Data Quality

3 sources

Confidence: Low

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 HIGH

CISA KEV No

Public POC Yes

EPSS 4.2%

Patch available Yes

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

Poc

System Exposure· derived

Open

Automatable· derived

Human Impact· derived

Medium

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +4

CVSS: +44

PoC: +20

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

OS Command Injection CRITICAL

OS command injection occurs when an application passes unsanitized user input directly into system shell commands.

Affected Products (CPE)NVD

cpe:2.3:o:totolink:a3002r_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:totolink:a3002ru-v1_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:totolink:a3002ru-v2_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:totolink:a702r-v2_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:totolink:a702r-v3_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:totolink:n100re-v3_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:totolink:n150rt_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:totolink:n200re-v3_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:totolink:n200re-v4_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:totolink:n210re_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:totolink:n300rh-v3_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:totolink:n300rt_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:totolink:n302r_plus_firmware:*:*:*:*:*:*:*:*

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References

Advisories & patches

PATCH https://www.totolink.net/home/index/newsss/id/196.html

Search Externally

GitHub PoC

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