Is CVE-2026-42373 actively exploited?

No active exploitation of CVE-2026-42373 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-42373 be exploited remotely?

Partially. CVE-2026-42373 requires adjacent network access (same network segment) to exploit.

What is the CVSS score of CVE-2026-42373?

CVE-2026-42373 has a CVSS score of 8.8 (HIGH).

HOME VULNERABILITIESCVE-2026-42373

HIGH

CVE-2026-42373

CWE-798Published: May 4, 2026· Updated: May 6, 2026

8.8

CVSS v3.1

EPSS:0.06%probability of exploitation in 30 daysPercentile:18.8th

Official Description

D-Link DIR-605L Hardware Revision B2 (End-of-Life, EOL) contains a hardcoded telnet backdoor. The device starts a telnet daemon at boot via /bin/telnetd.sh with the username "Alphanetworks" and the static password "wrgn76_dlwbr_dir605L" read from /etc/alpha_config/image_sign. The custom telnetd binary accepts a -u user:password flag, and the custom login binary uses strcmp() to validate credentials. Successful authentication grants an unauthenticated attacker on the local network a root shell with full administrative control. The device has reached End-of-Life (EOL) and will not receive patches.

NVD Source

Technical Analysis

CVE-2026-42373 requires adjacent network access, limiting remote exploitation but still posing risk in shared or local network environments.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.