CVE-2024-33894: Cosy+ devices running a firmware · Insecure Permission
Source CVE Database V5
Not known to be exploited · CVSS 8.8 High.
Data as of 26 Oct 2026, 14:05 UTC
- EPSS
- 0.8% chance of exploitation in 30 days – higher than 57% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 2 Aug 2024
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
AI-suggested
Organizations should immediately inventory their Cosy+ devices to identify those running vulnerable firmware versions below 21.2s10 (21.x) or 22.1s3 (22.x). Until official patches or firmware updates are released, restrict network access to these devices by implementing strict firewall rules and network segmentation to limit exposure. Enforce the principle of least privilege by reviewing and tightening user and process permissions on affected devices. Monitor device logs and network traffic for unusual activities indicative of privilege escalation attempts. Employ intrusion detection systems tailored to detect anomalies in industrial control environments. Engage with the device vendor for timelines on patch releases and apply updates promptly once available. Additionally, consider deploying compensating controls such as multi-factor authentication for device access and regular security audits of device configurations. Document and test incident response plans specifically for potential exploitation scenarios involving these devices.
Description
Insecure Permission vulnerability in Cosy+ devices running a firmware 21.x below 21.2s10 or a firmware 22.x below 22.1s3 are executing several processes with elevated privileges.
References
- ewon.biz/products/cosy/ewon-cosy-wifi (opens in a new tab)
- hms-networks.com/cyber-security (opens in a new tab)
- hmsnetworks.blob.core.windows.net/nlw/docs/default-source/products/cybersecurity/security-advisory/hms-security-advisory-2024-07-29-001--ewon-several-cosy--vulnerabilities.pdf (opens in a new tab)
- blog.syss.com/posts/hacking-a-secure-industrial-remote-access-gateway/ (opens in a new tab)
- seclists.org/fulldisclosure/2024/Aug/23 (opens in a new tab)