Hard-coded password for access to power controller chip memory

published 2023-12-01 2 y ago modified 2026-06-17 4 mo ago also EUVD-2023-32515

cvss: 3.5; 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 24%
public exploits: 0; none known

The password for access to the debugging console of the PoWer Controller chip (PWC) of the MIB3 infotainment is hard-coded in the firmware. The console allows attackers with physical access to the MIB3 unit to gain full control over the PWC chip.

Vulnerability found on Škoda Superb III (3V3) - 2.0 TDI manufactured in 2022.

Patch / fix

fixed in 1

preh mib3_firmware 0304

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 2 y ago (2023-12-05)

Exploit prediction

0.31% chance of exploitation in the next 30 days, higher than 24% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	3.5	CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
NVD	3.1	6.8	CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

JOYNEXT MIB3 Infotainment Unit

Classification

Weakness

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

References

asrg.io /security-advisories/hard-coded-password-for-access-to-power-controller-chip-memory/
third-party-advisory

Sources

CVE List CVE-2023-28895
NVD CVE-2023-28895

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