CVE-2026-2540

HIGH

Micca Car Alarm System KE700 - Authentication Bypass via Replay Attack

Title source: llm
STIX 2.1

Description

The Micca KE700 system contains flawed resynchronization logic and is vulnerable to replay attacks. This attack requires sending two previously captured codes in a specific sequence. As a result, the system can be forced to accept previously used (stale) rolling codes and execute a command. Successful exploitation allows an attacker to clone the alarm key. This grants the attacker unauthorized access to the vehicle to unlock or lock the doors.

References (1)

Core 1
Core References
Various Sources third-party-advisory
https://asrg.io/security-advisories/cve-2026-2540/

Scores

CVSS v4 8.4
EPSS 0.0021
EPSS Percentile 10.9%
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:N/SC:L/SI:L/SA:H/V:D/RE:M

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-288 CWE-294
Status published
Products (2)
Micca Auto Electronics Co., Ltd./Car Alarm System KE700 KE700
Micca Auto Electronics Co., Ltd./Car Alarm System KE700 KE700+
Published Feb 15, 2026
Tracked Since Feb 18, 2026