TOTOLINK A3300R shadow.sample hard-coded password

published 2024-07-28 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-48123

cvss: 2.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 16%
public exploits: 0; none known

A vulnerability has been found in TOTOLINK A3300R 17.0.0cu.557_B20221024 and classified as problematic. Affected by this vulnerability is an unknown functionality of the file /etc/shadow.sample. The manipulation leads to use of hard-coded password. It is possible to launch the attack on the local host. The complexity of an attack is rather high. The exploitation appears to be difficult. The exploit has been disclosed to the public and may be used. The identifier VDB-272569 was assigned to this vulnerability. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: partial
Assessed: 2 y ago (2024-07-29)

Exploit prediction

0.25% chance of exploitation in the next 30 days, higher than 16% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/abcdefg-png/IoT-vulnerable/blob/main/TOTOLINK/A3300R/shadow.md referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	4.0	2.0	CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
CNA	3.1	2.5	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
CNA	3.0	2.5	CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
CNA	2.0	1.0	AV:L/AC:H/Au:S/C:P/I:N/A:N
CNA	4.0	2.0	CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
NVD	3.1	4.7	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected products

TOTOLINK A3300R

Classification

Weakness

CWE-259 Use of Hard-coded Password
CWE-798 Use of Hard-coded Credentials

References

github.com /abcdefg-png/IoT-vulnerable/blob/main/TOTOLINK/A3300R/shadow.md
exploit
vuldb.com /?id.272569
vdb-entry, third-party-advisory
vuldb.com /?ctiid.272569
signature, permissions-required, third-party-advisory
vuldb.com /?submit.377465
third-party-advisory

Sources

CVE List CVE-2024-7155
NVD CVE-2024-7155

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary