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TI-2026-02624 Aliases CVE-2026-3040GHSA-9xx2-jmjv-w5vp

DrayTek Vigor 300B Web Management uploadlangs cgiGetFile os command injection

Priority MEDIUM 56CWE-77Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
Low · Low · Low
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-77.

Summary

A vulnerability was identified in DrayTek Vigor 300B up to 1.5.1.6. This affects the function cgiGetFile of the file /cgi-bin/mainfunction.cgi/uploadlangs of the component Web Management Interface. The manipulation of the argument File leads to os command injection. The attack may be initiated remotely. The exploit is publicly available and might be used. The vendor confirms that "300B is EoL, and this is an authenticated vulnerability. We don't plan to fix it." 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 0.10148 95th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA and NVD
Fix No fix listed No fixed version in the sources yet

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

VendorProductAffected versionsFixed inStatusSource
DrayTekVigor 300B1.5.1.0; 1.5.1.1; 1.5.1.2; 1.5.1.3; 1.5.1.4; 1.5.1.5; 1.5.1.6—No fix listedCNA
  • Vigor 300B VendorDrayTek Affected 1.5.1.0; 1.5.1.1; 1.5.1.2; 1.5.1.3; 1.5.1.4; 1.5.1.5; 1.5.1.6 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:draytek:vigor300b_firmware:*:*:*:*:*:*:*:*up to 1.5.1.6VulnerableDrayTek
cpe:2.3:h:draytek:vigor300b:-:*:*:*:*:*:*:*not specified by NVDRunning onDrayTek
  • cpe:2.3:o:draytek:vigor300b_firmware:*:*:*:*:*:*:*:* Versions up to 1.5.1.6 Vulnerable ·DrayTek
  • cpe:2.3:h:draytek:vigor300b:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·DrayTek

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-3040
  2. 2026-10-03 Alias added: GHSA-9xx2-jmjv-w5vp
  3. 2026-10-25 EPSS moved to the 95th–99th percentile

References

Exploit 1

  • 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-2020-08715 A stack-based buffer overflow in cvmd on Draytek Vigor3900, Vigor2960, and Vigor300B… CVSS 3.1CRITICAL 9.8
  • TI-2020-08714 A stack-based buffer overflow in apmd on Draytek Vigor3900, Vigor2960, and Vigor300B… CVSS 3.1CRITICAL 9.8
  • TI-2020-08713 /cgi-bin/activate.cgi on Draytek Vigor3900, Vigor2960, and Vigor300B devices before 1.5.1… CVSS 3.1CRITICAL 9.8
See all 16 →

Sources

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