CVE-2022-36613Public exploit

Root password recovery via hard-coded shadow entry

Published Aug 28, 2022 · Updated Aug 3, 2024

Hard-coded credentials in TOTOLINK N600R firmware 4.3.0cu.7647_B20210106 allow local users to recover the root password. The firmware image stores a reusable root-password hash in /etc/shadow.sample, and offline cracking reveals a fixed plaintext value. Access to the firmware image is required; the published material identifies no network login service that accepts the recovered credential.

CVSS severity7.8
High
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Hard-coded credentials in TOTOLINK N600R firmware 4.3.0cu.7647_B20210106 allow local users to recover the root password. The firmware image stores a reusable root-password hash in /etc/shadow.sample, and offline cracking reveals a fixed plaintext value. Access to the firmware image is required; the published material identifies no network login service that accepts the recovered credential.

The record

CVE
CVE-2022-36613
Published
Aug 28, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-798, CAPEC-191, CAPEC-70, T1552.001
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 28, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-798Use of Hard-coded Credentials
CAPEC-191Read Sensitive Constants Within an Executable
CAPEC-70Try Common or Default Usernames and Passwords
T1552.001Unsecured Credentials: Credentials In Files

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo