Which versions of D-Link are affected by CVE-2026-4188?

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.

Is there a public PoC exploit available for CVE-2026-4188?

Yes, a public proof-of-concept exploit is available for CVE-2026-4188. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2026-4188?

Within 24 hours: Identify all DIR-619L 2.06B01 devices in your environment and isolate them from production networks if possible; document affected systems and their criticality. Within 7 days: Develop a device replacement plan prioritizing internet-facing and critical network segments; implement compensating controls listed below for devices that cannot be immediately replaced. Within 30 days: Complete replacement of all affected DIR-619L units with supported alternatives or retire them entirely.

D-Link CVE-2026-4188

Q: What is the CVSS score of CVE-2026-4188?

CVE-2026-4188 has a CVSS 4.0 base score of 7.4 (High). CVSS vector: 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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. EPSS exploitation probability: 0.0%.

EUVD-2026-12247 HIGH

Stack-based Buffer Overflow (CWE-121)

2026-03-15 VulDB

Buffer Overflow D-Link Stack Overflow

7.4

CVSS 4.0 · NVD

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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Lifecycle Timeline

Re-analysis Queued

Apr 22, 2026 - 21:37 vuln.today

cvss_changed

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

EUVD ID Assigned

Mar 15, 2026 - 20:00 euvd

EUVD-2026-12247

Analysis Generated

Mar 15, 2026 - 20:00 vuln.today

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.

AnalysisAI

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.

Technical ContextAI

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.

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.