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URL: https://nvd.nist.gov/vuln/detail/CVE-2020-8515

⇱ NVD - CVE-2020-8515

  1. Vulnerabilities

CVE-2020-8515 Detail

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
http://packetstormsecurity.com/files/156979/DrayTek-Vigor2960-Vigor3900-Vigor300B-Remote-Command-Execution.html CVE, MITRE Exploit  Third Party Advisory  VDB Entry 
https://sku11army.blogspot.com/2020/01/draytek-unauthenticated-rce-in-draytek.html CVE, MITRE Permissions Required  Third Party Advisory 
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-8515 CISA-ADP US Government Resource 
https://www.draytek.com/about/security-advisory/vigor3900-/-vigor2960-/-vigor300b-router-web-management-page-vulnerability-%28cve-2020-8515%29/ CVE, MITRE Vendor Advisory 

This CVE is in CISA's Known Exploited Vulnerabilities Catalog

Reference CISA's BOD 22-01 and Known Exploited Vulnerabilities Catalog for further guidance and requirements.

Vulnerability Name Date Added Due Date Required Action
Multiple DrayTek Vigor Routers Web Management Page Vulnerability 11/03/2021 05/03/2022 Apply updates per vendor instructions.

Weakness Enumeration

CWE-ID CWE Name Source
CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') 👁 cwe source acceptance level
NIST   CISA-ADP  

Known Affected Software Configurations Switch to CPE 2.2

CPEs loading, please wait.

Denotes Vulnerable Software
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Change History

17 change records found show changes

CVE Modified by CISA-ADP 6/16/2026 11:26:30 PM

Action Type Old Value New Value
Added SSVC 
{"timestamp":"2025-02-04T20:20:12.502737Z","id":"CVE-2020-8515","options":[{"exploitation":"active"},{"automatable":"yes"},{"technicalImpact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}

CVE Modified by MITRE 6/16/2026 11:26:30 PM

Action Type Old Value New Value
Added Affected 
[{"vendor":"n/a","product":"n/a","versions":[{"version":"n/a","status":"affected"}]}]

Modified Analysis by NIST 11/07/2025 5:04:15 PM

Action Type Old Value New Value
Added Reference Type 
CISA-ADP: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-8515 Types: US Government Resource

CVE Modified by CISA-ADP 10/21/2025 8:17:13 PM

Action Type Old Value New Value
Added Reference 
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-8515

CVE Modified by CISA-ADP 10/21/2025 4:18:08 PM

Action Type Old Value New Value
Removed Reference 
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-8515

CVE Modified by CISA-ADP 10/21/2025 3:18:40 PM

Action Type Old Value New Value
Added Reference 
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-8515

Modified Analysis by NIST 2/28/2025 1:05:08 PM

Action Type Old Value New Value
Changed CPE Configuration 
AND
 OR
 *cpe:2.3:o:draytek:vigor2960_firmware:1.3.1:beta:*:*:*:*:*:*
 OR
 cpe:2.3:h:draytek:vigor2960:-:*:*:*:*:*:*:*


 
AND
 OR
 *cpe:2.3:o:draytek:vigor2960_firmware:1.3.1:beta:*:*:*:*:*:*
 OR
 cpe:2.3:h:draytek:vigor2960:-:*:*:*:*:*:*:*
Changed CPE Configuration 
AND
 OR
 *cpe:2.3:o:draytek:vigor2960_firmware:1.3.1:beta:*:*:*:*:*:*
 OR
 cpe:2.3:h:draytek:vigor2960:-:*:*:*:*:*:*:*


 
AND
 OR
 *cpe:2.3:o:draytek:vigor2960_firmware:1.3.1:beta:*:*:*:*:*:*
 OR
 cpe:2.3:h:draytek:vigor2960:-:*:*:*:*:*:*:*
Changed CPE Configuration 
AND
 OR
 *cpe:2.3:o:draytek:vigor300b_firmware:1.4.4:beta:*:*:*:*:*:*
 *cpe:2.3:o:draytek:vigor300b_firmware:1.3.3:beta:*:*:*:*:*:*
 *cpe:2.3:o:draytek:vigor300b_firmware:1.4.2.1:beta:*:*:*:*:*:*
 OR
 cpe:2.3:h:draytek:vigor300b:-:*:*:*:*:*:*:*


 
AND
 OR
 *cpe:2.3:o:draytek:vigor300b_firmware:1.4.4:beta:*:*:*:*:*:*
 *cpe:2.3:o:draytek:vigor300b_firmware:1.3.3:beta:*:*:*:*:*:*
 *cpe:2.3:o:draytek:vigor300b_firmware:1.4.2.1:beta:*:*:*:*:*:*
 OR
 cpe:2.3:h:draytek:vigor300b:-:*:*:*:*:*:*:*
Changed CPE Configuration 
AND
 OR
 *cpe:2.3:o:draytek:vigor300b_firmware:1.4.4:beta:*:*:*:*:*:*
 *cpe:2.3:o:draytek:vigor300b_firmware:1.3.3:beta:*:*:*:*:*:*
 *cpe:2.3:o:draytek:vigor300b_firmware:1.4.2.1:beta:*:*:*:*:*:*
 OR
 cpe:2.3:h:draytek:vigor300b:-:*:*:*:*:*:*:*


 
AND
 OR
 *cpe:2.3:o:draytek:vigor300b_firmware:1.4.4:beta:*:*:*:*:*:*
 *cpe:2.3:o:draytek:vigor300b_firmware:1.3.3:beta:*:*:*:*:*:*
 *cpe:2.3:o:draytek:vigor300b_firmware:1.4.2.1:beta:*:*:*:*:*:*
 OR
 cpe:2.3:h:draytek:vigor300b:-:*:*:*:*:*:*:*
Changed CPE Configuration 
AND
 OR
 *cpe:2.3:o:draytek:vigor3900_firmware:1.4.4:beta:*:*:*:*:*:*
 OR
 cpe:2.3:h:draytek:vigor3900:-:*:*:*:*:*:*:*


 
AND
 OR
 *cpe:2.3:o:draytek:vigor3900_firmware:1.4.4:beta:*:*:*:*:*:*
 OR
 cpe:2.3:h:draytek:vigor3900:-:*:*:*:*:*:*:*
Changed CPE Configuration 
AND
 OR
 *cpe:2.3:o:draytek:vigor3900_firmware:1.4.4:beta:*:*:*:*:*:*
 OR
 cpe:2.3:h:draytek:vigor3900:-:*:*:*:*:*:*:*


 
AND
 OR
 *cpe:2.3:o:draytek:vigor3900_firmware:1.4.4:beta:*:*:*:*:*:*
 OR
 cpe:2.3:h:draytek:vigor3900:-:*:*:*:*:*:*:*

CVE Modified by CISA-ADP 2/04/2025 4:15:20 PM

Action Type Old Value New Value
Added CVSS V3.1 
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Added CWE 
CWE-78

CVE Modified by CVE 11/21/2024 12:38:58 AM

Action Type Old Value New Value
Added Reference 
http://packetstormsecurity.com/files/156979/DrayTek-Vigor2960-Vigor3900-Vigor300B-Remote-Command-Execution.html
Added Reference 
https://sku11army.blogspot.com/2020/01/draytek-unauthenticated-rce-in-draytek.html
Added Reference 
https://www.draytek.com/about/security-advisory/vigor3900-/-vigor2960-/-vigor300b-router-web-management-page-vulnerability-%28cve-2020-8515%29/

Modified Analysis by NIST 7/25/2024 12:40:16 PM

Action Type Old Value New Value
Changed Reference Type 
https://sku11army.blogspot.com/2020/01/draytek-unauthenticated-rce-in-draytek.html Third Party Advisory


 
https://sku11army.blogspot.com/2020/01/draytek-unauthenticated-rce-in-draytek.html Permissions Required, Third Party Advisory
Changed Reference Type 
https://www.draytek.com/about/security-advisory/vigor3900-/-vigor2960-/-vigor300b-router-web-management-page-vulnerability-%28cve-2020-8515%29/ No Types Assigned


 
https://www.draytek.com/about/security-advisory/vigor3900-/-vigor2960-/-vigor300b-router-web-management-page-vulnerability-%28cve-2020-8515%29/ Vendor Advisory

CVE Modified by MITRE 5/14/2024 3:44:07 AM

Action Type Old Value New Value

CVE Modified by MITRE 11/06/2023 10:26:36 PM

Action Type Old Value New Value
Added Reference 
MITRE https://www.draytek.com/about/security-advisory/vigor3900-/-vigor2960-/-vigor300b-router-web-management-page-vulnerability-%28cve-2020-8515%29/ [No types assigned]
Removed Reference 
MITRE https://www.draytek.com/about/security-advisory/vigor3900-/-vigor2960-/-vigor300b-router-web-management-page-vulnerability-(cve-2020-8515)/

Modified Analysis by NIST 1/01/2022 3:03:37 PM

Action Type Old Value New Value
Changed Reference Type 
http://packetstormsecurity.com/files/156979/DrayTek-Vigor2960-Vigor3900-Vigor300B-Remote-Command-Execution.html No Types Assigned


 
http://packetstormsecurity.com/files/156979/DrayTek-Vigor2960-Vigor3900-Vigor300B-Remote-Command-Execution.html Exploit, Third Party Advisory, VDB Entry

CWE Remap by NIST 7/21/2021 7:39:23 AM

Action Type Old Value New Value
Changed CWE 
CWE-74



CWE-78


CVE Modified by MITRE 3/31/2020 1:15:27 PM

Action Type Old Value New Value
Added Reference 
http://packetstormsecurity.com/files/156979/DrayTek-Vigor2960-Vigor3900-Vigor300B-Remote-Command-Execution.html [No Types Assigned]

Initial Analysis by NIST 2/13/2020 5:23:50 PM

Action Type Old Value New Value
Added CVSS V3.1 
NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Added CVSS V2 
NIST (AV:N/AC:L/Au:N/C:C/I:C/A:C)
Added CWE 
NIST CWE-74
Added CPE Configuration 
AND
 OR
 *cpe:2.3:o:draytek:vigor2960_firmware:1.3.1:beta:*:*:*:*:*:*
 OR
 cpe:2.3:h:draytek:vigor2960:-:*:*:*:*:*:*:*
Added CPE Configuration 
AND
 OR
 *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:*:*:*:*:*:*
 OR
 cpe:2.3:h:draytek:vigor300b:-:*:*:*:*:*:*:*
Added CPE Configuration 
AND
 OR
 *cpe:2.3:o:draytek:vigor3900_firmware:1.4.4:beta:*:*:*:*:*:*
 OR
 cpe:2.3:h:draytek:vigor3900:-:*:*:*:*:*:*:*
Changed Reference Type 
https://sku11army.blogspot.com/2020/01/draytek-unauthenticated-rce-in-draytek.html No Types Assigned


 
https://sku11army.blogspot.com/2020/01/draytek-unauthenticated-rce-in-draytek.html Third Party Advisory
Changed Reference Type 
https://www.draytek.com/about/security-advisory/vigor3900-/-vigor2960-/-vigor300b-router-web-management-page-vulnerability-(cve-2020-8515)/ No Types Assigned


 
https://www.draytek.com/about/security-advisory/vigor3900-/-vigor2960-/-vigor300b-router-web-management-page-vulnerability-(cve-2020-8515)/ Exploit, Vendor Advisory

CVE Modified by MITRE 2/10/2020 1:15:12 PM

Action Type Old Value New Value
Changed 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.


 
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.
Added Reference 
https://www.draytek.com/about/security-advisory/vigor3900-/-vigor2960-/-vigor300b-router-web-management-page-vulnerability-(cve-2020-8515)/ [No Types Assigned]

Quick Info

CVE Dictionary Entry:
CVE-2020-8515
NVD Published Date:
02/01/2020
NVD Last Modified:
06/16/2026
Source:
MITRE