CVE-2023-26245

Name: CVE-2023-26245
Creator: NVD / NIST
Published: 2023-04-27T01:15:08.413+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.33%

Last modified Jun 17, 2026

CVE-2023-26245 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. An issue was discovered in the Hyundai Gen5W_L in-vehicle infotainment system AE_E_PE_EUR.S5W_L001.001.211214. The AppUpgrade binary file, which is used during the firmware installation process, can be modified by an attacker to bypass the version check in order to install any firmware version (e.g., newer, older, or customized). EPSS estimates a 0.33% chance of exploitation in the next 30 days.

Description

An issue was discovered in the Hyundai Gen5W_L in-vehicle infotainment system AE_E_PE_EUR.S5W_L001.001.211214. The AppUpgrade binary file, which is used during the firmware installation process, can be modified by an attacker to bypass the version check in order to install any firmware version (e.g., newer, older, or customized). This indirectly allows an attacker to install custom firmware in the IVI system.

Metrics

CVSS 3.1

7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.33%

25.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Hyundai	Gen5w L Firmware	ae_e_pe_eur.s5w_l001.001.211214

References

https://sowhat.iit.cnr.itNot Applicable
https://sowhat.iit.cnr.it:8443/can-work/chimaeraExploit, Third Party Advisory
https://sowhat.iit.cnr.it:8443/can-work/chimaera/-/blob/main/Report/IIT-01-2023.pdfExploit, Third Party Advisory
https://sowhat.iit.cnr.itNot Applicable
https://sowhat.iit.cnr.it:8443/can-work/chimaeraExploit, Third Party Advisory
https://sowhat.iit.cnr.it:8443/can-work/chimaera/-/blob/main/Report/IIT-01-2023.pdfExploit, Third Party Advisory

Timeline

Published: Apr 27, 2023
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2023-26245?

How severe is CVE-2023-26245?

CVE-2023-26245 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.33% probability of exploitation in the next 30 days.

How do I fix CVE-2023-26245?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-26245?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST