Vulnerability details

CVE-2026-113391

DrayTek Vigor2960

DrayTek Vigor2960 Upload Endpoint mainfunction.cgi uploadlangs command injection

CVSS 4.0

9.4Critical

Official description

A vulnerability has been found in DrayTek Vigor2960 1.5.1.6 Revision 8218. This affects the function uploadlangs of the file /cgi-bin/mainfunction.cgi of the component Upload Endpoint. Such manipulation leads to command injection. The attack can be executed remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 1.5.1.7 is able to mitigate this issue. It is recommended 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.

CVSS scores

Score	Version	Source	Vector
9.4Critical	4.0	CVEProject cvelistV5 (CNA) (VulDB)	`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P`
9.9Critical	3.1	CVEProject cvelistV5 (CNA) (VulDB)	`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C`
9.9Critical	3.0	CVEProject cvelistV5 (CNA) (VulDB)	`CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C`
9.0High	2.0	CVEProject cvelistV5 (CNA) (VulDB)	`AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:OF/RC:C`

Affected products

Vendor	Product	Versions	Source
DrayTek	Vigor2960	1.5.1.6 Revision 8218	CVEProject cvelistV5 (CNA)

References and advisories

https://vuldb.com/vuln/422667 vdb-entrytechnical-description
https://vuldb.com/vuln/422667/cti signaturepermissions-required
https://vuldb.com/cve/CVE-2026-113391 third-party-advisory
https://vuldb.com/submit/992244 third-party-advisory
https://github.com/yikesoftware/DrayTek_Vigor2960_Security_Analysis/tree/main/cases/DRV2960-0008-authenticated-upload-filename-command-injection exploit
https://fw.draytek.com.tw/Vigor2960/Firmware/v1.5.1.7/Vigor2960_v1.5.1.7.zip patch

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Details

Published: 2026-10-20
Last updated: 2026-10-20
State: Published
Assigner (CNA): VulDB
Kolun priority: 45 · Medium

Exploit prediction (EPSS)

2.06%

Probability of exploitation in 30 days

81.4%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: No
Exploitation: Proof of concept
Technical impact: Total

Weaknesses (CWE)

CWE-77
Command Injection
CWE-74
Injection