CVE-2026-42084: CWE-620: Unverified Password Change in OpenC3 cosmos
OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded systems. Prior to versions 6.10.5 and 7.0.0-rc3, the OpenC3 password change functionality allows a user to change their password without providing the old password, by accepting a valid session token instead. In assumed breach scenarios, this behaviour can be exploited by an attacker who has already obtained a valid session token, to gain persistence in hijacked account (including admin) and prevent legitimate users from accessing the account. This issue has been patched in versions 6.10.5 and 7.0.0-rc3.
AI Analysis
Technical Summary
OpenC3 COSMOS versions before 6.10.5 and certain pre-release versions before 7.0.0-rc3 contain a CWE-620 vulnerability where the password change functionality does not require the old password if a valid session token is presented. This allows an attacker with a valid session token to change the password without further authentication, potentially locking out legitimate users and maintaining unauthorized access. The vulnerability has been fixed in versions 6.10.5 and 7.0.0-rc3.
Potential Impact
An attacker who has obtained a valid session token can change the password of the account without knowing the original password, enabling persistence in the compromised account, including administrative accounts. This can lead to denial of access for legitimate users and unauthorized control over the account. There are no reports of active exploitation in the wild at this time.
Mitigation Recommendations
Upgrade OpenC3 COSMOS to version 6.10.5 or later, or to version 7.0.0-rc3 or later, where this vulnerability has been patched. Since this is a software vulnerability and not a cloud service, applying the official patch is necessary to remediate the issue. Patch status is confirmed by the vendor advisory embedded in the description.
CVE-2026-42084: CWE-620: Unverified Password Change in OpenC3 cosmos
Description
OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded systems. Prior to versions 6.10.5 and 7.0.0-rc3, the OpenC3 password change functionality allows a user to change their password without providing the old password, by accepting a valid session token instead. In assumed breach scenarios, this behaviour can be exploited by an attacker who has already obtained a valid session token, to gain persistence in hijacked account (including admin) and prevent legitimate users from accessing the account. This issue has been patched in versions 6.10.5 and 7.0.0-rc3.
CVSS v3.1
Score 8.1high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
OpenC3 COSMOS versions before 6.10.5 and certain pre-release versions before 7.0.0-rc3 contain a CWE-620 vulnerability where the password change functionality does not require the old password if a valid session token is presented. This allows an attacker with a valid session token to change the password without further authentication, potentially locking out legitimate users and maintaining unauthorized access. The vulnerability has been fixed in versions 6.10.5 and 7.0.0-rc3.
Potential Impact
An attacker who has obtained a valid session token can change the password of the account without knowing the original password, enabling persistence in the compromised account, including administrative accounts. This can lead to denial of access for legitimate users and unauthorized control over the account. There are no reports of active exploitation in the wild at this time.
Mitigation Recommendations
Upgrade OpenC3 COSMOS to version 6.10.5 or later, or to version 7.0.0-rc3 or later, where this vulnerability has been patched. Since this is a software vulnerability and not a cloud service, applying the official patch is necessary to remediate the issue. Patch status is confirmed by the vendor advisory embedded in the description.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-23T19:17:30.566Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69f8dc9fcbff5d86103c00fa
Added to database: 5/4/2026, 5:51:27 PM
Last enriched: 5/12/2026, 6:18:12 AM
Last updated: 6/19/2026, 10:52:05 AM
Views: 75
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