CVE-2020-8515

CRITICAL9.8

CISA KEV

Published 2020-02-01 · Updated 2026-06-17 · Source cve@mitre.org

Summary

CVE-2020-8515 is a critical-severity (CVSS 9.8) vulnerability in DrayTek Multiple Vigor Routers. CISA added it to the Known Exploited Vulnerabilities catalog on November 3, 2021, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by May 3, 2022. CISA does not currently list it as used in ransomware campaigns. DrayTek has 5 vulnerabilities in the KEV catalog, 0 of them linked to ransomware.

All 5 known-exploited DrayTek vulnerabilities →

Description

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 vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE-78CWE-78

CISA Known-Exploited Vulnerability

Product: DrayTek — Multiple Vigor Routers

Name: Multiple DrayTek Vigor Routers Web Management Page Vulnerability

Date added: 2021-11-03 · Due: 2022-05-03

Required action: Apply updates per vendor instructions.

References

View on NVD

More exploited DrayTek vulnerabilities

Most recently added to CISA KEV

CVE-2024-12987
Vigor Routers — DrayTek Vigor Routers OS Command Injection Vulnerability
added 2025-05-15
CVE-2020-15415
Multiple Vigor Routers — DrayTek Multiple Vigor Routers OS Command Injection Vulnerability
added 2024-09-30
CVE-2021-20124
VigorConnect — Draytek VigorConnect Path Traversal Vulnerability
added 2024-09-03
CVE-2021-20123
VigorConnect — Draytek VigorConnect Path Traversal Vulnerability
added 2024-09-03

View all →

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