MEDIUM
CVE-2020-35557
CWE-269Published: February 16, 2021· Updated: Jun 17, 2026
6.5
CVSS v3.1
Official Description
An issue in MB connect line mymbCONNECT24, mbCONNECT24 and Helmholz myREX24 and myREX24.virtual in all versions through v2.11.2 allows a logged in user to see devices in the account he should not have access to due to improper use of access validation.
Technical Analysis
CVE-2020-35557 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
Exploitation requires low 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), with a CVSS base score of 6.5.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Affected Vendors & Products
helmholz2 product(s)
myrex24myrex24.virtual
mbconnectline2 product(s)
mbconnect24mymbconnect24
Source: NVD CPE · 4 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
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
All References (6)
→
https://cert.vde.com/en/advisories/VDE-2021-003Third Party Advisory
→
https://cert.vde.com/en/advisories/VDE-2022-039Third Party Advisory
→
https://mbconnectline.com/security-advice/Vendor Advisory
→
https://cert.vde.com/en/advisories/VDE-2021-003Third Party Advisory
→
https://cert.vde.com/en/advisories/VDE-2022-039Third Party Advisory
→
https://mbconnectline.com/security-advice/Vendor Advisory
Quick Facts
CVE IDCVE-2020-35557
CVSS Score6.5 / 10
SeverityMEDIUM
WeaknessCWE-269
CISA KEVNo
Affected2 vendor(s)
PublishedFeb 16, 2021
Related CVEs (CWE-269)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2020-35557 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.