CVE-2020-10826Vigor2960 Firmware Command Injection
/cgi-bin/activate.cgi on Draytek Vigor3900, Vigor2960, and Vigor300B devices before 1.5.1 allows remote attackers to achieve command injection via a remote HTTP request in DEBUG mode.
Published Mar 26, 2020 · Updated May 5, 2025
Key Facts
Patch immediately- CVE-2020-10826 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Vigor2960 Firmware (Draytek), Vigor300b Firmware (Draytek), Vigor3900 Firmware (Draytek).
- It is exploited in the wild, listed in CIRCL KEV, Industry KEV feed since Mar 26, 2020. A public exploit is reported by tracking sources, but no code link is listed yet.
- EPSS estimates a 39% probability of exploitation in the next 30 days.
- Fixed versions are available, including Vigor2960 Firmware 1.5.1, Vigor300b Firmware 1.5.1, Vigor3900 Firmware 1.5.1.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Scores
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
39%
Higher than 98.6% of all scored CVEs
Exploit maturity
Exploited (KEV)
ATLAS score
53/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Mar 26, 2020
0 days after publication
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Exploited (KEV)
Public exploit code
0
Proof-of-concept links
In-the-wild evidence
9
Reports of active use
Advisories And Exploit References
Description
/cgi-bin/activate.cgi on Draytek Vigor3900, Vigor2960, and Vigor300B devices before 1.5.1 allows remote attackers to achieve command injection via a remote HTTP request in DEBUG mode.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CIRCL KEV | Mar 26, 2020 | n/a | Not reported |
| Industry KEV feed | Mar 26, 2020 | n/a | Not reported |
Affected Products
3 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Vigor2960 FirmwareDraytek | See advisory | 1.5.1 |
| Vigor300b FirmwareDraytek | See advisory | 1.5.1 |
| Vigor3900 FirmwareDraytek | See advisory | 1.5.1 |
Patched Releases
Vigor2960 Firmware
1.5.1
Vigor300b Firmware
1.5.1
Vigor3900 Firmware
1.5.1
Timeline
Publicly disclosed
Mar 26, 2020
Added to CIRCL KEV
Mar 26, 2020
Added to Industry KEV feed
Mar 26, 2020
Last updated
May 5, 2025
Weakness Type
- CWE-77 Improper Neutralization of Special Elements used in a Command ('Command Injection')
References
- advisorydraytek.com · -vigor300b-stack-based-buffer-overflow-vulnerab…
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
FAQ
Common Questions.
/cgi-bin/activate.cgi on Draytek Vigor3900, Vigor2960, and Vigor300B devices before 1.5.1 allows remote attackers to achieve command injection via a remote HTTP request in DEBUG mode.
Affected: Vigor2960 Firmware (Draytek); Vigor300b Firmware (Draytek); Vigor3900 Firmware (Draytek). The full list is in the CVE brief.
It is exploited in the wild, listed in CIRCL KEV, Industry KEV feed since Mar 26, 2020.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
A public exploit is reported by tracking sources, but no code link is listed yet.
Fixed versions are available, including Vigor2960 Firmware 1.5.1, Vigor300b Firmware 1.5.1, Vigor3900 Firmware 1.5.1.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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