CVE-2020-8515

CVE Enrichment

CVSS: 9.8 CRITICAL
EPSS: 99.99%
EPSS Percentile: 99.99%
CISA KEV: YES — Known Exploited Vulnerability

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.

Technical Details

CVSS Version: 3.1
CNA / NVD Source: cve@mitre.org
Published: 01-Feb-2020 20:15
Last Modified: 17-Jun-2026 10:26
EPSS Date: 2026-10-12
CWE: CWE-78

CVSS Vector


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

CISA KEV Details

Date Added: 2021-11-03
Remediation Due: 2022-05-03
Known Ransomware Campaign Use: Unknown
Required Action: Apply updates per vendor instructions.
Notes: https://nvd.nist.gov/vuln/detail/CVE-2020-8515

Affected Products / Versions

draytek / vigor2960_firmware
Version / affected range: 1.3.1
cpe:2.3:o:draytek:vigor2960_firmware:1.3.1:beta:*:*:*:*:*:*
draytek / vigor300b_firmware
Version / affected range: 1.3.3
cpe:2.3:o:draytek:vigor300b_firmware:1.3.3:beta:*:*:*:*:*:*
draytek / vigor300b_firmware
Version / affected range: 1.4.2.1
cpe:2.3:o:draytek:vigor300b_firmware:1.4.2.1:beta:*:*:*:*:*:*
draytek / vigor300b_firmware
Version / affected range: 1.4.4
cpe:2.3:o:draytek:vigor300b_firmware:1.4.4:beta:*:*:*:*:*:*
draytek / vigor3900_firmware
Version / affected range: 1.4.4
cpe:2.3:o:draytek:vigor3900_firmware:1.4.4:beta:*:*:*:*:*:*

References

Last enrichment sync: 13-Oct-2026 04:45
Sources: NVD · FIRST EPSS · CISA KEV
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Reported Context (1)

CVE-2020-8515 Recorded Future Identifies 85 High-Impact Vulnerabilities in July, Many Actively Exploited

CVE (80)

Malware (4)

Threat Actors (8)

Vendors (25)

Products (70)

Tools (1)

Countries (1)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.