Arbitrary file upload in Draytek Vigor2960
CVE-2026-113393
A vulnerability was determined in DrayTek Vigor2960 1.5.1.6 Revision 8218. This issue affects some unknown processing of the file /cgi-bin/mainfunction.cgi of the component commonupload. Executing a manipulation of the argument upload_path/upload_name can lead to unrestricted upload. The attack may be performed from remote. The exploit has been publicly disclosed and may be utilized. Upgrading to version 1.5.1.7 is capable of addressing this issue. It is advisable to upgrade the affected component. The vendor explains: "2960 1.5.1.7 has corrected many security issues. And 2960 is EoS with limited support, only major issues would be reviewed(e.g. unauthenticated vuln.)". This vulnerability only affects products that are no longer supported by the maintainer.
Published .
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/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
- Draytek Vigor2960 — versions 1.5.1.6 Revision 8218
Weakness classification (CWE)
References
- vuldb.com/vuln/422669 (technical-description, vdb-entry)
- vuldb.com/vuln/422669/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-113393 (third-party-advisory)
- vuldb.com/submit/992246 (third-party-advisory)
- github.com/yikesoftware/DrayTek_Vigor2960_Security_Analysis/tree/main/cases/DRV… (exploit)
- fw.draytek.com.tw/Vigor2960/Firmware/v1.5.1.7/Vigor2960_v1.5.1.7.zip (patch)
Frequently asked questions
- What is CVE-2026-113393?
- CVE-2026-113393 is a medium-severity vulnerability in Draytek Vigor2960, classified under Improper Access Control. CVSS score: 6.3/10. Published 2026-10-20.
- How severe is CVE-2026-113393?
- Medium severity. CVSS v3 base score is 6.3 out of 10.