What is the CVSS score of EUVD-2025-19135?

EUVD-2025-19135 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: 0.4%.

Is there a public PoC exploit available for EUVD-2025-19135?

Yes, a public proof-of-concept exploit is available for EUVD-2025-19135. Prioritise patching immediately. EPSS: 0.4%.

How to fix or mitigate EUVD-2025-19135?

Within 24 hours: Identify all TOTOLINK A702R 4.0.0-B20230721.1521 devices in your network and isolate them from critical systems if possible; enable logging on affected devices. Within 7 days: Contact TOTOLINK for patch availability and timeline; implement network segmentation to restrict management access; disable IPv6 setup functionality if not required. Within 30 days: Deploy replacement hardware from alternative vendors or apply any available firmware updates; conduct network forensics to detect potential compromise.

A702r Firmware EUVD-2025-19135

| CVE-2025-6627 HIGH

Buffer Overflow (CWE-119)

2025-06-25 cna@vuldb.com

Buffer Overflow TP-Link A702r Firmware TOTOLINK

8.8

CVSS 3.1 · NVD

View

Vulnerability Assessment

Weakness	CWE CWE-119 OWASP Top 10:2025 A06:2021 - Vulnerable and Outdated Components ASVS 5.0 V15 - Secure Coding and Architecture Bounds checking, buffer size validation MITRE ATT&CK 2 techniques across 2 tactics: Execution, Privilege Escalation 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 8.8. EPSS 0.4%. Public PoC/exploit available. No patch confirmed.
Exploit ScenarioDerived	An attacker could exploit this vulnerability in A vulnerability to compromise the security of affected deployments, potentially impacting confidentiality, integrity, or availability.

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

No patch listed yet 0.4% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 15, 2026

A buffer overflow vulnerability in A vulnerability (CVSS 8.8). Risk factors: public PoC available.

Earlier versions of this analysis (1)

v1 Mar 15, 2026 - 23:19 CVSS 8.8

RemediationAI

Monitor vendor channels for patch availability. Consider network segmentation to limit exposure if patching is delayed.

Affected VersionsENISA

A702R 4.0.0-B20230721.1521

Affected Packages

euvd a702r no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

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

Technical ContextAI · show details

CWE-119 (Buffer Overflow). CVSS 8.8 indicates high severity. Affects A vulnerability.

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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

Lifecycle Timeline

PoC Detected

Jul 16, 2025 - 19:35 vuln.today

Public exploit code

CVE Published

Jun 25, 2025 - 19:15 nvd

HIGH 8.8

DescriptionCVE.org

A vulnerability has been found in TOTOLINK A702R 4.0.0-B20230721.1521 and classified as critical. This vulnerability affects unknown code of the file /boafrm/formIpv6Setup of the component HTTP POST Request Handler. The manipulation of the argument submit-url leads to buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.

Executive ViewAI

Why It Matters

A critical buffer overflow vulnerability in TOTOLINK A702R routers allows remote attackers to execute arbitrary code without authentication, potentially compromising network infrastructure and all connected devices. Organizations using this router model face immediate risk of unauthorized access, data interception, and network takeover, with active exploits already circulating publicly.

Business Impact: Severe

Compensating Controls

Implement WAF rules blocking POST requests to /boafrm/formIpv6Setup with suspicious submit-url parameters; restrict HTTP/HTTPS access to affected routers via firewall to authorized IPs only; disable remote management interfaces and IPv6 features if operationally feasible; segment router management traffic on isolated VLAN; implement intrusion detection signatures for buffer overflow attempts; monitor for lateral movement from compromised routers.

Threat Intelligence Overview

EPSS Score

0.4%

Top 42% exploitable

Exploit

POC

Public exploit code exists

Data Quality

6 sources

Confidence: High

EUVD

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 Yes

EPSS 0.4%

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

Out-of-Cycle

Exploitation· derived

Poc

System Exposure· derived

Open

Automatable· derived

Human Impact

Very High

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +44

PoC: +20

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Buffer Overflow HIGH

A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.