PatchTheCVECVE-2026-42084: OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded
CVE-2026-42084 is a high-severity flaw (CVSS 8.1) affecting cosmos. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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 gai
Why this priority
- High severity
- Public exploit reference
A fixed release or distro patch exists.
Risk facts
| CVSS score | 8.1 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 0.3% (top 77%) |
| CISA exploited list | No |
| Weakness | CWE-620 |
| Published | 2026-05-04 |
| Last modified | 2026-10-26 |
Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-42084?
cosmos: upgrade to 6.10.5. Exact commands for each OS are on this page.
Is CVE-2026-42084 being exploited?
CVE-2026-42084 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-42084 affect?
CVE-2026-42084 affects cosmos. Severity is high (CVSS 8.1). 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
How urgent is CVE-2026-42084?
Priority 39/100. High severity; Public exploit reference
Related CVEs
- CVE-2026-42087 CRITICAL 9.6 UPGRADE OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded
- CVE-2026-42088 CRITICAL 9.6 UPGRADE OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded
- CVE-2026-42085 MEDIUM 4.3 UPGRADE OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded
- CVE-2026-42086 MEDIUM 4.6 UPGRADE OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded