CVE-2024-7155Public exploit

Local credential recovery via fixed shadow hash

Published Jul 28, 2024 · Updated Aug 1, 2024

Hard-coded credentials in TOTOLINK A3300R 17.0.0cu.557_B20221024 allow local users to recover a reusable password hash. The firmware stores a fixed account password hash in /etc/shadow.sample instead of generating a device-specific secret. Exploitation requires local low-privileged access and offline password recovery; published evidence establishes confidentiality impact only.

CVSS severity4.7
Medium
EPSS probability0.25%
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 A3300R 17.0.0cu.557_B20221024 allow local users to recover a reusable password hash. The firmware stores a fixed account password hash in /etc/shadow.sample instead of generating a device-specific secret. Exploitation requires local low-privileged access and offline password recovery; published evidence establishes confidentiality impact only.

The record

CVE
CVE-2024-7155
Published
Jul 28, 2024
Updated
Aug 1, 2024
Vendor
TOTOLINK
Product
A3300R
Classifications
CWE-259, CWE-798, T1552.001
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 28, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 1, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=17.0.0cu.557_B20221024

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

TOTOLINK · A3300Rversion=17.0.0cu.557_B20221024

Published CVSS scores

2.5VulDBCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
1.0VulDBAV:L/AC:H/Au:S/C:P/I:N/A:N
4.7NIST NVDCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
2.0VulDBCVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

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-259Use of Hard-coded Password
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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