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CVE-2024-33897

26
FAUCET Score

CVE-2024-33897 is a critical vulnerability affecting HMS Networks Ewon Cosy+ devices, allowing a compromised device to request a Certificate Signing Request (CSR) from the Talk2m server on behalf of another device, leading to an availability issue. With a CVSS score of 9.1, this vulnerability has a network attack vector, low attack complexity, and high impact on integrity and availability, requiring no privileges or user interaction. While the vulnerability was patched on the Talk2m production server on April 18, 2024, there is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding it.

Impacted Technologies

VendorProductVersion(s)CPE
>= 21.0s0, < 21.2s10CPE matchmatch criteria
cpe:2.3:o:hms-networks:ewon_cosy\+_firmware:*:*:*:*:*:*:*:*
>= 22.0s0, < 22.1s3CPE matchmatch criteria
cpe:2.3:o:hms-networks:ewon_cosy\+_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.1CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.66%
Probability of exploitation in next 30 days
EPSS Percentile
47.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0066 is in the 29th percentile among its peer group of 36,833 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

Remediation records are not available for this CVE.

References

seclists.org / fulldisclosure/2024/Aug/24
seclists.org / fulldisclosure/2024/Aug/27
blog.syss.com / posts/hacking-a-secure-industrial-remote-access-gateway
ExploitThird Party Advisory
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
Vendor Advisory
ewon.biz / products/cosy/ewon-cosy-wifi
Product
hms-networks.com / cyber-security
Not Applicable