CVE-2020-8515

At a glance

Severity: CRITICAL 9.8
Exploitation: Known exploited (CISA KEV) · added 2021-11-03
Exploited per ENISA since 2021-11-03
EPSS: EPSS 99.99 % · percentile 100 (2026-10-27)
State: PUBLISHED
Published: 2020-02-01
Updated: 2025-10-21
Assigner: mitre
NVD status: Analyzed

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.

Scores

Version	Score	Vector	Scored by
CVSS 3.1	CRITICAL 9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	CISA-ADP
CVSS 3.1	CRITICAL 9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	NVD · nvd@nist.gov (Primary)
CVSS 3.1	CRITICAL 9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	NVD · 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)
CVSS 2.0	HIGH 10.0	AV:N/AC:L/Au:N/C:C/I:C/A:C	NVD · nvd@nist.gov (Primary)

Weaknesses (CWE)

CWE-78

European references

ENISA EUVD · EUVD-2020-29381
GCVE · GCVE-0-2020-8515

Affected configurations (NVD CPE)

cpe:2.3:o:draytek:vigor2960_firmware:1.3.1:beta:*:*:*:*:*:*
cpe:2.3:o:draytek:vigor300b_firmware:1.3.3:beta:*:*:*:*:*:*
cpe:2.3:o:draytek:vigor300b_firmware:1.4.2.1:beta:*:*:*:*:*:*
cpe:2.3:o:draytek:vigor300b_firmware:1.4.4:beta:*:*:*:*:*:*
cpe:2.3:o:draytek:vigor3900_firmware:1.4.4:beta:*:*:*:*:*:*

Affected products

Product	Versions
	affected n/a

References

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
CISA Known Exploited Vulnerabilities	CC0 1.0
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD