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CVE-2023-26246

23
FAUCET Score

CVE-2023-26246 is a high-severity vulnerability affecting the Hyundai Gen5W_L in-vehicle infotainment system firmware (AE_E_PE_EUR.S5W_L001.001.211214). An attacker can modify the AppUpgrade binary during firmware installation, bypassing digital signature checks and enabling the installation of custom firmware. This local attack, with low complexity and privileges, could lead to complete compromise of confidentiality, integrity, and availability of the IVI system. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
ae_e_pe_eur.s5w_l001.001.211214CPE matchmatch criteria
cpe:2.3:o:hyundai:gen5w_l_firmware:ae_e_pe_eur.s5w_l001.001.211214:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.33%
Probability of exploitation in next 30 days
EPSS Percentile
25.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0033 is in the 64th percentile among its peer group of 17,061 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

sowhat.iit.cnr.it
Not Applicable
sowhat.iit.cnr.it / can-work/chimaera
ExploitThird Party Advisory
sowhat.iit.cnr.it / can-work/chimaera/-/blob/main/Report/IIT-01-2023.pdf
ExploitThird Party Advisory