What is CVE-2026-30643?

CVE-2026-30643 is a critical-severity vulnerability in Dedecms, classified under Code Injection. CVSS score: 9.8/10. Published 2026-04-01.

How severe is CVE-2026-30643?

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

RCE in Dedecms

CVE-2026-30643

An issue was discovered in DedeCMS 5.7.118 allowing attackers to execute code via crafted setup tag values in a module upload.

Vulnerability class: RCE (Remote Code Execution)

Published 2026-04-01 · 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: 0.008 (54.0th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 54.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.008 · change: +0.002

Affected products

Dedecms

Weakness classification (CWE)

CWE-94 — Code Injection

References

www.dedecms.com/ (Product)
gist.github.com/0psPwn/10c43912adee9bfe2ff4fec947d4ee5a (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2026-30643?: CVE-2026-30643 is a critical-severity vulnerability in Dedecms, classified under Code Injection. CVSS score: 9.8/10. Published 2026-04-01.
How severe is CVE-2026-30643?: Critical severity. CVSS v3 base score is 9.8 out of 10.