CVE-2020-35606Webmin OS Command Injection
Arbitrary command execution can occur in Webmin through 1.962.
Published Dec 21, 2020 · Updated Aug 7, 2026
Key Facts
Patch immediately- CVE-2020-35606 is a high-severity vulnerability (CVSS 8.8 v3.1) affecting Webmin.
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 28% probability of exploitation in the next 30 days.
- Fixed versions are available, including Webmin <=1.962, Webmin 1.962.
- Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
Scores
CVSS v3.1
8.8
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
28%
Higher than 98.0% of all scored CVEs
Exploit maturity
Proof of concept
ATLAS score
37/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Not listed
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Proof of concept
Public exploit code
2
Proof-of-concept links
In-the-wild evidence
1
Reports of active use
Description
Arbitrary command execution can occur in Webmin through 1.962. Any user authorized for the Package Updates module can execute arbitrary commands with root privileges via vectors involving %0A and %0C. NOTE: this issue exists because of an incomplete fix for CVE-2019-12840.
Affected Products
1 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| WebminWebmin | See advisory | 1.962 |
Patched Releases
Webmin
<=1.962
Timeline
Publicly disclosed
Dec 21, 2020
Last updated
Aug 7, 2026
Weakness Type
- CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
FAQ
Common Questions.
Arbitrary command execution can occur in Webmin through 1.962.
Affected: Webmin. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Webmin <=1.962, Webmin 1.962.
Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
Is CVE-2020-35606 On Your Attack Surface?
Brandefense matches it against the products discovered on your perimeter and opens a finding the day a CVE like this is listed.
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