CVE-2026-4377: CWE-1391 Use of Weak Credentials in D-Link Corporation DWR-X1820
Dlink DWR-X1820 router uses weak default password generated from its IMEI number and does not require users to change it. An attacker who knows how passwords are generated can easily crack the default password if they have the device IMEI number. This issue was fixed in version 1.00B16CP.
AI Analysis
Technical Summary
CVE-2026-4377 describes a vulnerability in the D-Link DWR-X1820 router where the default password is weak because it is generated from the device's IMEI number. Since users are not forced to change this default password, an attacker with knowledge of the IMEI and password generation scheme can easily compromise the device. This issue affects firmware version 1.00B14CP and was addressed in version 1.00B16CP.
Potential Impact
An attacker who obtains the IMEI number of the affected router can derive the default password and gain unauthorized access to the device. This could lead to compromise of the router's configuration and potentially network security. The CVSS score of 6.0 reflects a medium impact due to the requirement of local or adjacent network access (AV:A) and high attack complexity (AC:H).
Mitigation Recommendations
Upgrade the D-Link DWR-X1820 router firmware to version 1.00B16CP or later, where this vulnerability has been fixed. Users should ensure the default password is changed to a strong, unique password. Since the vendor fixed this issue in the specified version, applying the official update is the recommended remediation.
CVE-2026-4377: CWE-1391 Use of Weak Credentials in D-Link Corporation DWR-X1820
Description
Dlink DWR-X1820 router uses weak default password generated from its IMEI number and does not require users to change it. An attacker who knows how passwords are generated can easily crack the default password if they have the device IMEI number. This issue was fixed in version 1.00B16CP.
CVSS v4.0
Score 6.0medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-4377 describes a vulnerability in the D-Link DWR-X1820 router where the default password is weak because it is generated from the device's IMEI number. Since users are not forced to change this default password, an attacker with knowledge of the IMEI and password generation scheme can easily compromise the device. This issue affects firmware version 1.00B14CP and was addressed in version 1.00B16CP.
Potential Impact
An attacker who obtains the IMEI number of the affected router can derive the default password and gain unauthorized access to the device. This could lead to compromise of the router's configuration and potentially network security. The CVSS score of 6.0 reflects a medium impact due to the requirement of local or adjacent network access (AV:A) and high attack complexity (AC:H).
Mitigation Recommendations
Upgrade the D-Link DWR-X1820 router firmware to version 1.00B16CP or later, where this vulnerability has been fixed. Users should ensure the default password is changed to a strong, unique password. Since the vendor fixed this issue in the specified version, applying the official update is the recommended remediation.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- CERT-PL
- Date Reserved
- 2026-03-18T12:46:23.457Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a181685e29bf47b50d4f6e0
Added to database: 5/28/2026, 10:18:45 AM
Last enriched: 5/28/2026, 10:33:36 AM
Last updated: 5/29/2026, 6:23:14 PM
Views: 18
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