How severe is CVE-2020-4682?

CVE-2020-4682 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-4682 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 8% (95th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-4682?

CVE-2020-4682 primarily affects Ibm Mq. In total, 47 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-4682?

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

When was CVE-2020-4682 published?

CVE-2020-4682 was published on 2021-01-28 and last updated on 2026-06-17.

CVE-2020-4682

CVE-2020-4682 is a critical-severity vulnerability in Ibm Mq with a CVSS 3.x base score of 9.8. 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-502.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 8% (95th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-502
Affected product: Ibm Mq
Published: 2021-01-28
Last modified: 2026-06-17

Description

IBM MQ 7.5, 8.0, 9.0, 9.1, 9.2 LTS, and 9.2 CD could allow a remote attacker to execute arbitrary code on the system, caused by an unsafe deserialization of trusted data. An attacker could exploit this vulnerability to execute arbitrary code on the system. IBM X-Force ID: 186509.

Frequently asked questions

What is CVE-2020-4682?: IBM MQ 7.5, 8.0, 9.0, 9.1, 9.2 LTS, and 9.2 CD could allow a remote attacker to execute arbitrary code on the system, caused by an unsafe deserialization of trusted data. An attacker could exploit this vulnerability to execute arbitrary code on the system. IBM X-Force ID: 186509.
How severe is CVE-2020-4682?: CVE-2020-4682 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-4682 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 8% (95th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-4682?: CVE-2020-4682 primarily affects Ibm Mq. In total, 47 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-4682?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2020-4682 published?: CVE-2020-4682 was published on 2021-01-28 and last updated on 2026-06-17.

References

Affected products (47)

cpe:2.3:a:ibm:mq:8.0.0.0:*:*:*:*:*:*:*
cpe:2.3:a:ibm:mq:8.0.0.1:*:*:*:*:*:*:*
cpe:2.3:a:ibm:mq:8.0.0.2:*:*:*:*:*:*:*
cpe:2.3:a:ibm:mq:8.0.0.3:*:*:*:*:*:*:*
cpe:2.3:a:ibm:mq:8.0.0.4:*:*:*:*:*:*:*
cpe:2.3:a:ibm:mq:8.0.0.5:*:*:*:*:*:*:*
cpe:2.3:a:ibm:mq:8.0.0.6:*:*:*:*:*:*:*
cpe:2.3:a:ibm:mq:8.0.0.7:*:*:*:*:*:*:*
cpe:2.3:a:ibm:mq:8.0.0.8:*:*:*:*:*:*:*
cpe:2.3:a:ibm:mq:8.0.0.9:*:*:*:*:*:*:*
cpe:2.3:a:ibm:mq:8.0.0.10:*:*:*:*:*:*:*
cpe:2.3:a:ibm:mq:8.0.0.11:*:*:*:*:*:*:*
cpe:2.3:a:ibm:mq:8.0.0.12:*:*:*:*:*:*:*
cpe:2.3:a:ibm:mq:8.0.0.13:*:*:*:*:*:*:*
cpe:2.3:a:ibm:mq:8.0.0.14:*:*:*:*:*:*:*
cpe:2.3:a:ibm:mq:8.0.0.15:*:*:*:*:*:*:*
cpe:2.3:a:ibm:mq:9.0.0.0:*:*:*:lts:*:*:*
cpe:2.3:a:ibm:mq:9.0.0.1:*:*:*:lts:*:*:*
cpe:2.3:a:ibm:mq:9.0.0.2:*:*:*:lts:*:*:*
cpe:2.3:a:ibm:mq:9.0.0.3:*:*:*:lts:*:*:*
cpe:2.3:a:ibm:mq:9.0.0.4:*:*:*:lts:*:*:*
cpe:2.3:a:ibm:mq:9.0.0.5:*:*:*:lts:*:*:*
cpe:2.3:a:ibm:mq:9.0.0.6:*:*:*:lts:*:*:*
cpe:2.3:a:ibm:mq:9.0.0.7:*:*:*:lts:*:*:*
cpe:2.3:a:ibm:mq:9.0.0.8:*:*:*:lts:*:*:*
cpe:2.3:a:ibm:mq:9.0.0.9:*:*:*:lts:*:*:*
cpe:2.3:a:ibm:mq:9.0.0.10:*:*:*:lts:*:*:*
cpe:2.3:a:ibm:mq:9.1.0.0:*:*:*:lts:*:*:*
cpe:2.3:a:ibm:mq:9.1.0.1:*:*:*:lts:*:*:*
cpe:2.3:a:ibm:mq:9.1.0.2:*:*:*:lts:*:*:*
cpe:2.3:a:ibm:mq:9.1.0.3:*:*:*:lts:*:*:*
cpe:2.3:a:ibm:mq:9.1.0.4:*:*:*:lts:*:*:*
cpe:2.3:a:ibm:mq:9.1.0.5:*:*:*:lts:*:*:*
cpe:2.3:a:ibm:mq:9.1.0.6:*:*:*:lts:*:*:*
cpe:2.3:a:ibm:mq:9.2.0.0:*:*:*:continuous_delivery:*:*:*
cpe:2.3:a:ibm:mq:9.2.1.0:*:*:*:continuous_delivery:*:*:*
cpe:2.3:a:ibm:mq_appliance:9.2.0.0:*:*:*:lts:*:*:*
cpe:2.3:a:ibm:websphere_mq:7.5.0.0:*:*:*:*:*:*:*
cpe:2.3:a:ibm:websphere_mq:7.5.0.1:*:*:*:*:*:*:*
cpe:2.3:a:ibm:websphere_mq:7.5.0.2:*:*:*:*:*:*:*

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