CVE-2021-26556
HIGH
7.8
CVSS Score
Published: October 7, 2021 at 01:00 AM UTC
Updated: June 17, 2026 at 03:43 AM UTC
3 products affected across 2 vendorsOctopus ServerOctopus DeployOctopus Server
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Severity
HIGH7.8
Exploit prediction
EPSS 0.3%
Description
When Octopus Server is installed using a custom folder location, folder ACLs are not set correctly and could lead to an unprivileged user using DLL side-loading to gain privileged access.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
0.9 ≤ v < 2020.4.229
Affected range stops below 2020.4.229, so it looks safe — our inference, not a vendor statement
2020.5.0 ≤ v < 2020.5.256
Affected range stops below 2020.5.256, so it looks safe — our inference, not a vendor statement
Affected range stops below 2020.4.229, so it looks safe — our inference, not a vendor statement
Affected range stops below 2020.5.256, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.
References (1)
CVSS
- Attack Vector
- LOCAL
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- REQUIRED
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- HIGH
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-426
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