D-Link DWR-X1820 prior 1.00B16CP weak credentials

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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3.0$0-$5k0.00

Summaryinfo

A vulnerability labeled as critical has been found in D-Link DWR-X1820. This vulnerability affects unknown code. Executing a manipulation can lead to weak credentials. The identification of this vulnerability is CVE-2026-4377. The attack needs to be done within the local network. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability has been found in D-Link DWR-X1820 and classified as problematic. This vulnerability affects an unknown part. The manipulation with an unknown input leads to a weak credentials vulnerability. The CWE definition for the vulnerability is CWE-1391. The product uses weak credentials (such as a default key or hard-coded password) that can be calculated, derived, reused, or guessed by an attacker. As an impact it is known to affect confidentiality. CVE summarizes:

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.

The weakness was shared by Bartłomiej Włodarski. The advisory is available at cert.pl. This vulnerability was named CVE-2026-4377 since 03/18/2026. The exploitation appears to be difficult. The attack needs to be done within the local network. No form of authentication is required for a successful exploitation. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 05/28/2026).

Upgrading to version 1.00B16CP eliminates this vulnerability.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 3.1
VulDB Meta Temp Score: 3.0

VulDB Base Score: 3.1
VulDB Temp Score: 3.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Weak credentials
CWE: CWE-1391
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: DWR-X1820 1.00B16CP

Timelineinfo

03/18/2026 CVE reserved
05/28/2026 +70 days Advisory disclosed
05/28/2026 +0 days VulDB entry created
05/28/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: dlink.com

Advisory: cert.pl
Researcher: Bartłomiej Włodarski
Status: Confirmed

CVE: CVE-2026-4377 (🔒)
GCVE (CVE): GCVE-0-2026-4377
GCVE (VulDB): GCVE-100-366754

Entryinfo

Created: 05/28/2026 13:54
Changes: 05/28/2026 13:54 (66)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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