How severe is CVE-2022-22520?

CVE-2022-22520 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2022-22520 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-22520?

CVE-2022-22520 primarily affects Mbconnectline Mbconnect24. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2022-22520?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2022-22520 published?

CVE-2022-22520 was published on 2022-09-14 and last updated on 2026-06-17.

CVE-2022-22520

CVE-2022-22520 is a medium-severity vulnerability in Mbconnectline Mbconnect24 with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-204.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 1% (52nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-204
Affected product: Mbconnectline Mbconnect24
Published: 2022-09-14
Last modified: 2026-06-17

Description

A remote, unauthenticated attacker can enumerate valid users by sending specific requests to the webservice of MB connect line mymbCONNECT24, mbCONNECT24 and Helmholz myREX24 and myREX24.virtual in all versions through v2.11.2.

Frequently asked questions

What is CVE-2022-22520?: A remote, unauthenticated attacker can enumerate valid users by sending specific requests to the webservice of MB connect line mymbCONNECT24, mbCONNECT24 and Helmholz myREX24 and myREX24.virtual in all versions through v2.11.2.
How severe is CVE-2022-22520?: CVE-2022-22520 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2022-22520 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-22520?: CVE-2022-22520 primarily affects Mbconnectline Mbconnect24. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2022-22520?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2022-22520 published?: CVE-2022-22520 was published on 2022-09-14 and last updated on 2026-06-17.

References

Affected products (4)

cpe:2.3:a:mbconnectline:mbconnect24:*:*:*:*:*:*:*:*
cpe:2.3:a:mbconnectline:mymbconnect24:*:*:*:*:*:*:*:*
cpe:2.3:a:helmholz:myrex24:*:*:*:*:*:*:*:*
cpe:2.3:a:helmholz:myrex24.virtual:*:*:*:*:*:*:*:*

More vulnerabilities in Mbconnectline Mbconnect24

CVE-2020-35565 — Critical (CVSS 9.8): An issue was discovered in MB CONNECT LINE mymbCONNECT24 and mbCONNECT24 through 2.6.2. The login pages bruteforce…
CVE-2020-10383 — Critical (CVSS 9.8): An issue was discovered in the MB CONNECT LINE mymbCONNECT24 and mbCONNECT24 software in all versions through 2.5.0.…
CVE-2026-33615 — Critical (CVSS 9.1): An unauthenticated remote attacker can exploit an unauthenticated SQL Injection vulnerability in the setinfo endpoint…
CVE-2023-0985 — High (CVSS 8.8): An Authorization Bypass vulnerability was found in MB Connect Lines mbCONNECT24, mymbCONNECT24 and Helmholz' myREX24…
CVE-2020-10382 — High (CVSS 8.8): An issue was discovered in the MB CONNECT LINE mymbCONNECT24 and mbCONNECT24 software in all versions through 2.5.0.…
CVE-2024-45273 — High (CVSS 8.4): An unauthenticated local attacker can decrypt the devices config file and therefore compromise the device due to a weak…

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Other CWE-204 vulnerabilities

CVE-2018-25350 — Critical (CVSS 9.8): userSpice 4.3.24 contains a username enumeration vulnerability that allows unauthenticated attackers to discover valid…
CVE-2025-5485 — High (CVSS 8.6): User names used to access the web management interface are limited to the device identifier, which is a numerical…
CVE-2026-33419 — High (CVSS 7.5): MinIO is a high-performance object storage system. Prior to RELEASE.2026-03-17T21-25-16Z, MinIO AIStor's STS (Security…
CVE-2025-12455 — High (CVSS 7.5): Observable response discrepancy vulnerability in OpenText™ Vertica allows Password Brute Forcing. The…
CVE-2025-46390 — High (CVSS 7.5): CWE-204: Observable Response Discrepancy
CVE-2025-3092 — High (CVSS 7.5): An unauthenticated remote attacker can enumerate valid user names from an unprotected endpoint.

Browse all CWE-204 vulnerabilities →