How severe is CVE-2021-39034?

CVE-2021-39034 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-2021-39034 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-39034?

CVE-2021-39034 affects Ibm Mq. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-39034?

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-2021-39034 published?

CVE-2021-39034 was published on 2022-02-17 and last updated on 2026-06-17.

CVE-2021-39034

CVE-2021-39034 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: 1% (63rd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Ibm Mq
Published: 2022-02-17
Last modified: 2026-06-17

Description

IBM MQ 9.1 LTS is vulnerable to a denial of service attack caused by an issue within the channel process. IBM X-Force ID: 213964.

Frequently asked questions

What is CVE-2021-39034?: IBM MQ 9.1 LTS is vulnerable to a denial of service attack caused by an issue within the channel process. IBM X-Force ID: 213964.
How severe is CVE-2021-39034?: CVE-2021-39034 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-2021-39034 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-39034?: CVE-2021-39034 affects Ibm Mq. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-39034?: 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-2021-39034 published?: CVE-2021-39034 was published on 2022-02-17 and last updated on 2026-06-17.

References

Affected products (1)

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

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