HOMEVULNERABILITIESCVE-2024-33896
HIGHPOC

CVE-2024-33896

CWE-78Published: August 2, 2024· Updated: Jun 17, 2026

7.2
CVSS v3.1

Official Description

Cosy+ devices running a firmware 21.x below 21.2s10 or a firmware 22.x below 22.1s3 are vulnerable to code injection due to improper parameter blacklisting. This is fixed in version 21.2s10 and 22.1s3.

NVD Source

Technical Analysis

CVE-2024-33896 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires high privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.2.

A proof-of-concept (PoC) exploit exists for CVE-2024-33896. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.High
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

hms-networks7 product(s)
ewon cosy\+ firmwareewon cosy\+ 4g apacewon cosy\+ 4g euewon cosy\+ 4g jpewon cosy\+ 4g naewon cosy\+ ethernetewon cosy\+ wifi
Source: NVD CPE · 7 total CPE entries

Exploit & PoC Resources

POC AVAILABLEProof-of-concept code exists
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://blog.syss.com/posts/hacking-a-secure-industrial-remote-access-gateway/
ADVISORYhttps://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
ADVISORYhttps://www.hms-networks.com/cyber-security

All References (5)

→
https://blog.syss.com/posts/hacking-a-secure-industrial-remote-access-gateway/Exploit · Third Party Advisory
→
https://hmsnetworks.blob.core.windows.net/nlw/docs/default-source/products/cybersecurity/security-advisory/hms-security-advisory-2024-07-29-001--ewon-several-cosy--vulnerabilities.pdfVendor Advisory
→
https://www.ewon.biz/products/cosy/ewon-cosy-wifiProduct
→
https://www.hms-networks.com/cyber-securityVendor Advisory
→
http://seclists.org/fulldisclosure/2024/Aug/21

Quick Facts

CVE IDCVE-2024-33896
CVSS Score7.2 / 10
SeverityHIGH
WeaknessCWE-78
CISA KEVNo
ExploitPOC
Affected1 vendor(s)
PublishedAug 2, 2024

Related CVEs (CWE-78)

CVE-2016-10043
10.0
CVE-2017-14459
10.0
CVE-2023-3572
10.0
CVE-2024-24576
10.0
CVE-2023-37903
10.0
CVE-2014-0659
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2024-33896 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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