What is CVE-2026-28704?

CVE-2026-28704 is a high-severity vulnerability in Japan Computer Emergency Response Team Coordination Center (Jpcert/cc) Emocheck, classified under Uncontrolled Search Path Element. CVSS score: 7.8/10. Published 2026-04-10.

How severe is CVE-2026-28704?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in Japan Computer Emergency Response Team Coordination Center (Jpcert/cc) Emocheck

CVE-2026-28704

Emocheck insecurely loads Dynamic Link Libraries (DLLs). If a crafted DLL file is placed to the same directory, an arbitrary code may be executed with the privilege of the user invoking EmoCheck.

Published 2026-04-10 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.002 (9.0th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 9th percentile — 9.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000

Affected products

Japan Computer Emergency Response Team Coordination Center (Jpcert/cc) Emocheck — versions all versions
Jpcert Emocheck

Weakness classification (CWE)

CWE-427 — Uncontrolled Search Path Element

References

www.jpcert.or.jp/press/2026/PR20260410.html (Third Party Advisory)
github.com/JPCERTCC/EmoCheck/ (Product)
jvn.jp/en/jp/JVN00263243/ (Third Party Advisory)

Frequently asked questions

What is CVE-2026-28704?: CVE-2026-28704 is a high-severity vulnerability in Japan Computer Emergency Response Team Coordination Center (Jpcert/cc) Emocheck, classified under Uncontrolled Search Path Element. CVSS score: 7.8/10. Published 2026-04-10.
How severe is CVE-2026-28704?: High severity. CVSS v3 base score is 7.8 out of 10.