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CVE-2025-68271

32
FAUCET Score

CVE-2025-68271 is a critical remote code execution vulnerability affecting OpenC3 COSMOS versions 5.0.0 through 6.10.1. An unauthenticated attacker can exploit this flaw via the JSON-RPC API by manipulating string parameters, leading to Ruby code execution due to improper parsing and evaluation of array-like inputs. This vulnerability carries a CVSS score of 10.0 (Critical) with a network attack vector and no user interaction required, allowing for complete compromise of confidentiality, integrity, and availability. While there is no evidence of active exploitation, public exploit code, or Metasploit/Nuclei modules, the vulnerability has garnered some community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
OpenC3Cosmos
>= 5.0.0, < 6.10.2CNA affected

CVSS Data

CVSS version used by this source: 3.1

10.0CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
6.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.54%
Probability of exploitation in next 30 days
EPSS Percentile
42.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0054 is in the 21st percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

rubygemspatch availablevia ghsa
Product: openc3Fixed in: 6.10.2

Vendor Advisories (1)

rubygemsGHSA-w757-4qv9-mghpcritical

openc3-api Vulnerable to Unauthenticated Remote Code Execution

Jan 13, 2026

References

github.com / OpenC3/cosmos/security/advisories/GHSA-w757-4qv9-mghp