Hardcoded Authentication Flaw in CP Plus Router
CVE-2026-19412

8.7HIGH

Key Information:

Vendor

Cp Plus

Status
Cp-xr-de21-s Router
Vendor
CVE Published:
28 August 2026

What is CVE-2026-19412?

The CP Plus CP-XR-DE21-S Router is affected by a vulnerability stemming from hardcoded HTTP Digest authentication credentials present in its firmware. These credentials are the same across all devices utilizing the affected firmware version. An attacker connected to the local network can exploit this flaw to extract the hardcoded authentication details, leading to unauthorized administrative access. This access allows an attacker to conduct privileged operations on the device, potentially compromising the network's security.

Affected Version(s)

CP-XR-DE21-S Router version 1.057.043_0027 or below

References

https://www.cert-in.org.in/s2cMainServlet?pageid=PUBVLNOT...
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Adjacent Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

This vulnerability is reported by a team of security researchers including Stalin S, Harini M, Rohit Surya A T and Reginald Alfret V.
.