How severe is CVE-2020-4870?

CVE-2020-4870 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-2020-4870 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-4870?

CVE-2020-4870 primarily affects Ibm Mq. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-4870?

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-2020-4870 published?

CVE-2020-4870 was published on 2020-12-21 and last updated on 2026-06-17.

CVE-2020-4870

CVE-2020-4870 is a high-severity vulnerability in Ibm Mq 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.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (74th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Ibm Mq
Published: 2020-12-21
Last modified: 2026-06-17

Description

IBM MQ 9.2 CD and LTS are vulnerable to a denial of service attack caused by an error processing connecting applications. IBM X-Force ID: 190833.

Frequently asked questions

What is CVE-2020-4870?: IBM MQ 9.2 CD and LTS are vulnerable to a denial of service attack caused by an error processing connecting applications. IBM X-Force ID: 190833.
How severe is CVE-2020-4870?: CVE-2020-4870 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-2020-4870 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-4870?: CVE-2020-4870 primarily affects Ibm Mq. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-4870?: 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-2020-4870 published?: CVE-2020-4870 was published on 2020-12-21 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:ibm:mq:9.2.0:*:*:*:continuous_delivery:*:*:*
cpe:2.3:a:ibm:mq:9.2.0:*:*:*:lts:*:*:*

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