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Dir 619l CVE-2026-4188

| EUVDEUVD-2026-12247 HIGH
Stack-based Buffer Overflow (CWE-121)
2026-03-15 VulDB
7.4
CVSS 4.0 · NVD
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Authenticate to D-Link DIR-619L web interface
  2. Delivery
    Send crafted request to /goform/formSchedule
  3. Exploit
    Manipulate curTime parameter with oversized payload
  4. Execution
    Trigger stack-based buffer overflow
  5. Impact
    Execute arbitrary code as root

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A06:2021 - Vulnerable and Outdated Components
ASVS 5.0
V15 - Secure Coding and Architecture Stack buffer bounds checking
MITRE ATT&CK

1 technique across 1 tactic: Execution

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

D-Link DIR-619L firmware version 2.06B01 with boa web server enabled; requires valid authentication credentials to access /goform/formSchedule endpoint; affects end-of-life unsupported devices only.

Impact

This represents a high real-world risk despite no KEV listing. The CVSS 8.8 score reflects network-accessible (AV:N), low complexity (AC:L) attacks requiring only low privileges (PR:L). The exploit is publicly available on GitHub, significantly increasing risk. While EPSS data is not provided, the combination of public exploit code, remote exploitability, and end-of-life status suggests active exploitation is likely. The SSVC framework would classify this as high priority due to: public exploit (E:P), network automatable attack, and high technical impact (complete system compromise).

Exploit ScenarioDerived

An attacker with valid low-privilege credentials (or using default credentials if unchanged) can remotely access the router's web interface and send a specially crafted HTTP request to /goform/formSchedule with an oversized curTime parameter. This triggers a stack overflow, allowing arbitrary code execution with the privileges of the boa web server process. The public exploit code available at https://github.com/wudipjq/my_vuln/blob/main/D-Link7/vuln_89/89.md provides a working proof-of-concept, making attacks trivial to execute.

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 15, 2026

Remote code execution in D-Link DIR-619L 2.06B01 results from a stack-based buffer overflow in the formSchedule function when the curTime parameter is manipulated via the /goform/formSchedule endpoint. An authenticated remote attacker can exploit this vulnerability to achieve full system compromise, and public exploit code is currently available. This vulnerability affects only end-of-life devices that no longer receive security updates.

Earlier versions of this analysis (1)
v1 Mar 15, 2026 - 20:00 CVSS 8.8

A stack-based buffer overflow vulnerability exists in the formSchedule function of D-Link DIR-619L router firmware version 2.06B01, allowing remote attackers with low privileges to execute arbitrary code by manipulating the curTime parameter. This vulnerability has a publicly available proof-of-concept exploit and affects end-of-life products no longer supported by D-Link, making patching unlikely.

RemediationAI

No official patch is available as D-Link has discontinued support for the DIR-619L series. Immediate mitigation steps include: 1) Replace affected DIR-619L routers with supported models, 2) If replacement is not immediately possible, disable remote administration features and restrict access to the web interface to trusted local networks only, 3) Monitor for suspicious access attempts to /goform/formSchedule endpoints. The D-Link website (https://www.dlink.com/) should be consulted for recommended replacement products.

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

The vulnerability resides in the boa web server component, specifically in the /goform/formSchedule endpoint of D-Link DIR-619L routers. This is a classic stack-based buffer overflow (CWE-121) where improper boundary checking on the curTime input parameter allows attackers to overwrite stack memory. The CPE identifier (cpe:2.3:a:d-link:dir-619l:*:*:*:*:*:*:*:*) indicates all versions of the DIR-619L firmware are potentially affected, though the specific confirmed vulnerable version is 2.06B01.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 7.4 HIGH
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
Low
User Interaction
None
Vulnerable system: Confidentiality
High
Vulnerable system: Integrity
High
Vulnerable system: Availability
High
Subsequent system: Confidentiality
None
Subsequent system: Integrity
None
Subsequent system: Availability
None

Lifecycle Timeline

3
CVSS changed
Apr 22, 2026 - 21:37 NVD
8.8 (HIGH) 7.4 (HIGH)
PoC Detected
Mar 16, 2026 - 14:53 vuln.today
Public exploit code
CVE Published
Mar 15, 2026 - 19:32 nvd
HIGH 8.8

DescriptionCVE.org

A security flaw has been discovered in D-Link DIR-619L 2.06B01. The affected element is the function formSchedule of the file /goform/formSchedule of the component boa. Performing a manipulation of the argument curTime results in stack-based buffer overflow. The attack may be initiated remotely. The exploit has been released to the public and may be used for attacks. This vulnerability only affects products that are no longer supported by the maintainer.

Executive ViewAI

Why It Matters

D-Link DIR-619L routers running firmware 2.06B01 are vulnerable to remote code execution through a stack buffer overflow, with public exploits now available. Organizations using these end-of-life devices face immediate risk of compromise, as the vendor will not release patches. This affects network perimeter security and any systems relying on these devices for connectivity or traffic management.

Business Impact: Severe
Compensating Controls

Network segmentation: restrict access to affected devices using firewall rules and ACLs; disable remote management features (telnet, SSH, HTTP/HTTPS access) if not operationally required; place devices behind a WAF or IPS configured to block malicious formSchedule requests with suspicious curTime parameters; monitor for exploitation attempts targeting /goform/formSchedule endpoint; consider blocking WAN access entirely and limiting to trusted LAN sources only. Note: These are temporary measures only—device replacement is mandatory.

Threat Intelligence Overview

EPSS Score
0.0%
Top 87% exploitable
Exploit
POC
Public exploit code exists
Data Quality
6 sources
Confidence: High

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 0.0%
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
Out-of-Cycle
Exploitation· derived
Poc
System Exposure· derived
Open
Automatable· derived
No
Human Impact
Very High

Priority Score

57
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +37
PoC: +20
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

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.

A stack-based buffer overflow occurs when a program writes more data to a buffer located on the stack than it was allocated to hold.

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