How severe is CVE-2019-4620?

CVE-2019-4620 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2019-4620 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-4620?

CVE-2019-4620 primarily affects Ibm Mq Appliance. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2019-4620?

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-2019-4620 published?

CVE-2019-4620 was published on 2020-01-28 and last updated on 2026-06-17.

CVE-2019-4620

CVE-2019-4620 is a high-severity vulnerability in Ibm Mq Appliance with a CVSS 3.x base score of 7.8. 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-20.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 4.6
EPSS exploit prediction: 0% (27th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Ibm Mq Appliance
Published: 2020-01-28
Last modified: 2026-06-17

Description

IBM MQ Appliance 8.0 and 9.0 LTS could allow a local attacker to bypass security restrictions caused by improper validation of environment variables. IBM X-Force ID: 168863.

Frequently asked questions

What is CVE-2019-4620?: IBM MQ Appliance 8.0 and 9.0 LTS could allow a local attacker to bypass security restrictions caused by improper validation of environment variables. IBM X-Force ID: 168863.
How severe is CVE-2019-4620?: CVE-2019-4620 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2019-4620 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-4620?: CVE-2019-4620 primarily affects Ibm Mq Appliance. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2019-4620?: 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-2019-4620 published?: CVE-2019-4620 was published on 2020-01-28 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:ibm:mq_appliance:*:*:*:*:*:*:*:*
cpe:2.3:a:ibm:mq_appliance:*:*:*:*:continuous_delivery:*:*:*
cpe:2.3:a:ibm:mq_appliance:*:*:*:*:lts:*:*:*

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