CVE-2026-3040
A vulnerability was identified in DrayTek Vigor 300B up to 1.5.1.6.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 10.1%, higher than 96% of all known CVEs. Patch or mitigate before the next change window.
Description
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.
- CVSS 4.0
- 2.0 LOWCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
- EPSS
- 10.15% probability · 96th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-77, CWE-78
- Affected
- draytek/vigor300b firmware
- Source
- cna@vuldb.com
EPSS moved from 7.2% on 24 September 2026 to 10.1% on 26 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
References
- https://github.com/master-abc/cve/issues/42Exploit, Issue Tracking
- https://vuldb.com/?ctiid.347394Permissions Required, Third Party Advisory, VDB Entry
- https://vuldb.com/?id.347394Third Party Advisory, VDB Entry
- https://vuldb.com/?submit.757126Third Party Advisory, VDB Entry
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.