TI-2026-76870 Aliases CVE-2026-113393 GHSA-hghw-mj7p-r942

Unrestricted file upload in DrayTek Vigor2960 commonupload function

MEDIUM 57CWE-284Published 2026-10-20 · Updated 2026-10-20

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Security bypass, Code execution
Confidentiality · integrity · availability: Low · Low · Low
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-284 and CWE-434.

Summary

DrayTek Vigor2960 starting at 1.5.1.6 Revision 8218 has an unrestricted file upload flaw (CWE-434) in the commonupload component of /cgi-bin/mainfunction.cgi. Manipulating the upload_path and upload_name arguments lets a remote attacker with low privileges upload files without restriction. A public exploit has been disclosed. The vendor says the product is end of life with limited support, so only major issues are reviewed.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.0033 26th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by the CNA

Fix Fixed Vigor2960 (DrayTek): 1.5.1.7

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
DrayTek	Vigor2960	1.5.1.6 Revision 8218	1.5.1.7	Patch available	CNA

Vigor2960 VendorDrayTek Affected 1.5.1.6 Revision 8218 Fixed in 1.5.1.7 Patch available CNA

CPE names CNA · 1

CPE	Versions	Role	Vendor
cpe:2.3:o:draytek:vigor2960_firmware::::::::	—	—	DrayTek

cpe:2.3:o:draytek:vigor2960_firmware:*:*:*:*:*:*:*:* Versions — — ·DrayTek

Remediation

Upgrade DrayTek Vigor2960 to version 1.5.1.7.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Fix · CNA Vigor2960 (DrayTek) Fixed in 1.5.1.7

Timeline

2026-10-20 Threatist record created from CVE-2026-113393
2026-10-20 Alias added: GHSA-hghw-mj7p-r942

References

Exploit 1

https://github.com/yikesoftware/DrayTek_Vigor2960_Security_Analysis/tree/main/cases/DRV2960-0010-authenticated-commonupload-arbitrary-file-clobber

Patch 1

https://fw.draytek.com.tw/Vigor2960/Firmware/v1.5.1.7/Vigor2960_v1.5.1.7.zip

TI-2020-12150 On DrayTek Vigor3900, Vigor2960, and Vigor300B devices before 1.5.1… KEVCVSS 3.1CRITICAL 9.8
TI-2020-06834 DrayTek Vigor2960 1.3.1_Beta, Vigor3900 1.4.4_Beta, and Vigor300B 1.3.3_Beta… KEVCVSS 3.1CRITICAL 9.8
TI-2024-12038 DrayTek Vigor2960/Vigor300B Web Management Interface apmcfgupload os command injection KEVCVSS 4.0MEDIUM 6.9
TI-2021-03424 Path traversal in Draytek VigorConnect KEVCVSS 3.1HIGH 7.5
TI-2021-03423 Path traversal in Draytek VigorConnect KEVCVSS 3.1HIGH 7.5
TI-2024-34310 In Draytek Vigor3900 1.5.1.3, attackers can inject malicious commands into… CVSS 3.1CRITICAL 9.8

See all 184 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences