How severe is CVE-2020-4766?

CVE-2020-4766 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2020-4766 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-4766?

CVE-2020-4766 primarily affects Ibm Mq Internet Pass-thru. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-4766?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-4766 published?

CVE-2020-4766 was published on 2021-01-22 and last updated on 2026-06-17.

CVE-2020-4766

CVE-2020-4766 is a high-severity vulnerability in Ibm Mq Internet Pass-thru with a CVSS 3.x base score of 7.5. 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-400.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (71st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-400
Affected product: Ibm Mq Internet Pass-thru
Published: 2021-01-22
Last modified: 2026-06-17

Description

IBM MQ Internet Pass-Thru 2.1 and 9.2 could allow a remote user to cause a denial of service by sending malformed MQ data requests which would consume all available resources. IBM X-Force ID: 188093.

Frequently asked questions

What is CVE-2020-4766?: IBM MQ Internet Pass-Thru 2.1 and 9.2 could allow a remote user to cause a denial of service by sending malformed MQ data requests which would consume all available resources. IBM X-Force ID: 188093.
How severe is CVE-2020-4766?: CVE-2020-4766 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2020-4766 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-4766?: CVE-2020-4766 primarily affects Ibm Mq Internet Pass-thru. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-4766?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-4766 published?: CVE-2020-4766 was published on 2021-01-22 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:ibm:mq_internet_pass-thru:2.1:*:*:*:*:*:*:*
cpe:2.3:a:ibm:mq_internet_pass-thru:9.2:*:*:*:*:*:*:*

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