RCE in Dedecms
CVE-2026-116063
A weakness has been identified in DedeCMS up to 5.7.118. Impacted is the function require_once of the file dede/update_guide.php. This manipulation of the argument vtime causes code injection. Remote exploitation of the attack is possible. The exploit has been made available to the public and could be used for attacks.
Published .
CVSS v3 metric
CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Dedecms — versions 5.7.118
Weakness classification (CWE)
References
- vuldb.com/vuln/426146 (technical-description, vdb-entry)
- vuldb.com/vuln/426146/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-116063 (third-party-advisory)
- vuldb.com/submit/999433 (third-party-advisory)
- github.com/SDshadow/cve (related)
- github.com/SDshadow/cve/tree/main/DedeCMS/V5.7.118-update_guide-RCE/poc (exploit, patch)
Frequently asked questions
- What is CVE-2026-116063?
- CVE-2026-116063 is a medium-severity vulnerability in Dedecms, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 4.7/10. Published 2026-10-25.
- How severe is CVE-2026-116063?
- Medium severity. CVSS v3 base score is 4.7 out of 10.