What is the CVSS score of CVE-2025-6374?

CVE-2025-6374 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: 0.2%.

Is there a public PoC exploit available for CVE-2025-6374?

Yes, a public proof-of-concept exploit is available for CVE-2025-6374. Prioritise patching immediately. EPSS: 0.2%.

How to fix or mitigate CVE-2025-6374?

Within 24 hours: Inventory all DIR-619L 2.06B01 devices in your network and isolate any found from production environments or restrict administrative access to trusted networks only. Within 7 days: Develop a device replacement plan and timeline, prioritizing routers with direct internet exposure. Within 30 days: Complete replacement of all DIR-619L units with supported, current-generation equipment and validate network segmentation to limit blast radius if legacy devices remain temporarily.

Dir 619l Firmware CVE-2025-6374

EUVD-2025-28731 HIGH

Buffer Overflow (CWE-119)

2025-06-21 cna@vuldb.com

RCE Buffer Overflow D-Link Dir 619l Firmware

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Weakness	CWE CWE-119 OWASP Top 10:2025 A06:2021 - Vulnerable and Outdated Components ASVS 5.0 V15 - Secure Coding and Architecture Bounds checking, buffer size validation MITRE ATT&CK 2 techniques across 2 tactics: Execution,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	Despite the high CVSS score of 8.8, real-world risk is contextually elevated due to multiple aggravating factors: (1) CVSS vector AV:N/AC:L/PR:L indicates remote exploitability with low complexity and only low privilege requirement, making attacks practical; (2) Public POC disclosure and exploit availability dramatically increase exploitation probability; (3) Product is end-of-life with no vendor support, meaning no patches will be released; (4) The vulnerability is automatable and produces reliable high-impact outcomes (arbitrary code execution). However, mitigating factors include: PR:L (requires authentication, reducing exposed attack surface), and likely limited deployment of legacy DIR-619L devices. SSVC framework analysis: Exploitation is Public, Impact is High (RCE), and Automatable conditions are met—this warrants immediate action for affected organizations. EPSS probability would likely be elevated (>40%) given public POC and low barriers to exploitation.
Exploit ScenarioDerived	An attacker with valid credentials to the DIR-619L web interface (obtained through credential compromise, default credentials, or insider access) sends a crafted HTTP POST request to /goform/formSetACLFilter with an excessively long curTime parameter containing shellcode. The oversized payload overwrites the stack, hijacking the function return address to execute arbitrary code with the privileges of the web service (typically root in embedded devices). The attacker gains persistent shell access, enabling botnet recruitment, lateral network movement, data exfiltration, or use as a pivot point for further attacks. Given AC:L and the existence of public POC code, an attacker can reliably execute this attack within seconds once credentials are obtained.

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

No patch listed yet 0.2% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 15, 2026

CVE-2025-6374 is a critical stack-based buffer overflow vulnerability in D-Link DIR-619L version 2.06B01, affecting the formSetACLFilter function's curTime parameter. An authenticated remote attacker can exploit this to achieve arbitrary code execution with high impact on confidentiality, integrity, and availability. Public exploit code exists for this end-of-life product, making it an immediate concern for organizations still operating legacy D-Link equipment.

RemediationAI

No official patch will be released by D-Link for this end-of-life product. Recommended actions: (1) Immediate: Disable remote management access to the router's web interface by disabling WAN-side access to port 80/443 via firewall rules; (2) Network isolation: Segregate affected routers to restricted network segments with minimal trust; (3) Access control: Enforce strong authentication credentials and disable default accounts; (4) Replacement: Migrate to current D-Link router models with active vendor support and security updates; (5) Monitoring: Deploy network IDS/IPS rules to detect exploitation attempts targeting /goform/formSetACLFilter with oversized curTime parameters; (6) Workaround: Restrict web interface access to trusted local networks only and disable any remote management features.

Affected VersionsENISA

DIR-619L 2.06B01

Affected Packages

euvd dir_619l 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

This vulnerability is rooted in CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer), specifically a stack-based buffer overflow. The vulnerable endpoint /goform/formSetACLFilter in D-Link DIR-619L's web management interface fails to properly validate the length of the 'curTime' parameter before copying it into a fixed-size stack buffer. The DIR-619L is a legacy WLAN router (CPE likely: cpe:2.3:h:dlink:dir-619l:-:*:*:*:*:*:*:*) running embedded Linux with a custom web interface. The vulnerability exists in the firmware's CGI handler that processes Access Control List (ACL) filter configuration requests. Without proper bounds checking, an attacker can overflow the stack, overwriting return addresses and other critical data structures to redirect execution flow.

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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

Jun 25, 2025 - 20:10 vuln.today

Public exploit code

CVE Published

Jun 21, 2025 - 01:15 nvd

HIGH 8.8

DescriptionCVE.org

A vulnerability was found in D-Link DIR-619L 2.06B01 and classified as critical. This issue affects the function formSetACLFilter of the file /goform/formSetACLFilter. The manipulation of the argument curTime leads to stack-based buffer overflow. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. This vulnerability only affects products that are no longer supported by the maintainer.

Executive ViewAI

Why It Matters

D-Link DIR-619L routers (2.06B01) contain a critical stack buffer overflow vulnerability that allows remote attackers to execute arbitrary code without authentication. Organizations using this end-of-life device face immediate risk of network compromise, data theft, and lateral movement into critical systems. Immediate action is required as public exploits are available and the vendor provides no patch.

Business Impact: High

Compensating Controls

Implement network segmentation to restrict DIR-619L device access; disable remote management features and limit administrative access to trusted IP addresses only; deploy WAF/IDS signatures to detect buffer overflow exploitation attempts targeting /goform/formSetACLFilter; monitor for suspicious outbound connections from device; consider placing device behind a managed network access controller that enforces authentication; evaluate replacement with supported alternative vendors as permanent mitigation.

Threat Intelligence Overview

EPSS Score

0.2%

Top 60% 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 0.2%

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

Poc

System Exposure· derived

Open

Automatable· derived

Human Impact

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.

Remote Code Execution CRITICAL

Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.