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Vulnerability record · CVE-2026-36538 · published 27 May 2026

CVE-2026-36538: Hard-coded credentials vulnerability

Netis AC1200 Router NC21 V4.0.1.4296 contains a hard-coded root credential stored in /etc/shadow.sample. The password for the root account is set to the trivially weak value root, allowing an attacker with access to the device to authenticate as root and gain full control of the underlying operating system.

7.3 CVSS 3.1 High EPSS 0.30% · top 79.6% CWE-798 · Hard-coded credentials Deferred
7.3CVSS 3.1 base score
0.30%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
2References
5 Jul 2026Last modified by NVD

Description

Netis AC1200 Router NC21 V4.0.1.4296 contains a hard-coded root credential stored in /etc/shadow.sample. The password for the root account is set to the trivially weak value root, allowing an attacker with access to the device to authenticate as root and gain full control of the underlying operating system.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

References

LinkTags
https://github.com/sir3ns/cve-disclosure/blob/main/CVE-2026-36538/readme.md
https://github.com/sir3ns/cve-disclosure/blob/main/CVE-2026-36538/readme.md

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Source: NIST National Vulnerability Database (record CVE-2026-36538), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.