CVE-2026-36538 | BDVDB-2026-335362 Detail

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.

Impact#

Per CVSS v3.1: confidentiality impact low, integrity impact low, availability impact low. Attack vector: network.

Weaknesses#

CWE-798 Use of Hard-coded Credentials

References#

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

Exploit#

No public exploit known

History#

Version 12026-05-27Record published in the CVE List.
Version 22026-07-05Most recent update recorded in the CVE List.

Published

Published: 2026-05-27
Last modified: 2026-07-05

Vendor information

Vendor: Not stated
Product: Not stated

Score

7.3 High

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 25.2.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Hard-coded Credentials

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

No version data in the source record.

Scoring System

CVSS v4.0

Not available

CVSS v3.1

7.3 High

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

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Privileges Required	None
User Interaction	None
Scope	Unchanged
Confidentiality	Low
Integrity	Low
Availability	Low

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).