Critical 9.8Known exploited (CISA KEV)Published Feb 1, 2020

CVE-2020-8515DrayTek Vigor2960 1.3.1_Beta, Vigor3900 1.4.4_Beta, and Vigor300B 1.3.3_Beta, 1.4.2.1_Beta, and 1.4.4_Beta devices allow remote code execution as root (without authentication) via shell metacharacter…

Updated under an hour ago (Oct 26, 2026, 4:50 PM ET)

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It affects draytek vigor2960_firmware and 2 other products. Add what you run to find out whether that includes you.

CISA lists it as known exploited since Nov 3, 2021; federal agencies had to remediate by May 3, 2022. Treat that date as your deadline.

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Every CVE for draytek vigor2960_firmware

Exploited in the last 30 days

DrayTek Vigor2960 1.3.1_Beta, Vigor3900 1.4.4_Beta, and Vigor300B 1.3.3_Beta, 1.4.2.1_Beta, and 1.4.4_Beta devices allow remote code execution as root (without authentication) via shell metacharacters to the cgi-bin/mainfunction.cgi URI. This issue has been fixed in Vigor3900/2960/300B v1.5.1.

CVSS: 9.8 CRITICAL (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-78
Known exploited: Added to CISA KEV Nov 3, 2021; federal remediation due May 3, 2022Apply updates per vendor instructions.
EPSS (exploitation in the next 30 days): 99.99% (percentile 100)
Assigned by: mitre
NVD analysis: Analyzed
Record last updated: Oct 21, 2025
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

draytek vigor2960_firmware draytek:vigor2960_firmware	1.3.1	NVD
draytek vigor300b_firmware draytek:vigor300b_firmware	1.3.3; 1.4.2.1; 1.4.4	NVD
draytek vigor3900_firmware draytek:vigor3900_firmware	1.4.4	NVD

References

References

https://sku11army.blogspot.com/2020/01/draytek-unauthenticated-rce-in-draytek.html	x-refsource-misc, permissions-required, third-party-advisory
https://www.draytek.com/about/security-advisory/vigor3900-/-vigor2960-/-vigor300b-router-web-management-page-vulnerability-%28cve-2020-8515%29/	x-refsource-misc, vendor-advisory
http://packetstormsecurity.com/files/156979/DrayTek-Vigor2960-Vigor3900-Vigor300B-Remote-Command-Execution.html	x-refsource-misc, exploit, third-party-advisory, vdb-entry
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-8515	us-government-resource

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.