What is CVE-2026-2999?

CVE-2026-2999 is a critical-severity vulnerability in Changing Idexpert Windows Logon Agent, classified under Download of Code Without Integrity Check. CVSS score: 9.8/10. Published 2026-03-02.

How severe is CVE-2026-2999?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Changing Idexpert Windows Logon Agent

CVE-2026-2999

IDExpert Windows Logon Agent developed by Changing has a Remote Code Execution vulnerability, allowing unauthenticated remote attackers to force the system to download arbitrary executable files from a remote source and execute them.

Published 2026-03-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.006 (44.1th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 44.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.006 · change: +0.000

Affected products

Changing Idexpert Windows Logon Agent — versions 2.7.3.230719
Changingtec Idexpert

Weakness classification (CWE)

CWE-494 — Download of Code Without Integrity Check

References

www.twcert.org.tw/tw/cp-132-10740-b2eb2-1.html (Third Party Advisory, third-party-advisory)
www.twcert.org.tw/en/cp-139-10741-daed4-2.html (Third Party Advisory, third-party-advisory)
www.changingtec.com/news_detail.jsp (vendor-advisory, Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-2999?: CVE-2026-2999 is a critical-severity vulnerability in Changing Idexpert Windows Logon Agent, classified under Download of Code Without Integrity Check. CVSS score: 9.8/10. Published 2026-03-02.
How severe is CVE-2026-2999?: Critical severity. CVSS v3 base score is 9.8 out of 10.