CVE-2022-36616Public exploit

Root credential disclosure via hard-coded password

Published Aug 28, 2022 · Updated Aug 3, 2024

Hard-coded credentials in TOTOLINK A810R 4.1.2cu.5182_B20201026 and 5.9c.4050_B20190424 allow local users to obtain the root password. The firmware's /etc/shadow.sample file stores a static root-password hash, and the public disclosure recovers its plaintext value. A local user who can read or extract that file can reuse the credential wherever the device accepts root authentication, enabling root-level control.

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

What happened

Hard-coded credentials in TOTOLINK A810R 4.1.2cu.5182_B20201026 and 5.9c.4050_B20190424 allow local users to obtain the root password. The firmware's /etc/shadow.sample file stores a static root-password hash, and the public disclosure recovers its plaintext value. A local user who can read or extract that file can reuse the credential wherever the device accepts root authentication, enabling root-level control.

The record

CVE
CVE-2022-36616
Published
Aug 28, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-798, 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

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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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 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
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

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Your stack

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