How severe is CVE-2019-4261?

CVE-2019-4261 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2019-4261 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-4261?

CVE-2019-4261 primarily affects Ibm Mq. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2019-4261?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2019-4261 published?

CVE-2019-4261 was published on 2019-08-05 and last updated on 2026-06-17.

CVE-2019-4261

CVE-2019-4261 is a medium-severity vulnerability in Ibm Mq with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.0
EPSS exploit prediction: 3% (84th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Ibm Mq
Published: 2019-08-05
Last modified: 2026-06-17

Description

IBM WebSphere MQ V7.1, 7.5, IBM MQ V8, IBM MQ V9.0LTS, IBM MQ V9.1 LTS, and IBM MQ V9.1 CD are vulnerable to a denial of service attack caused by specially crafted messages. IBM X-Force ID: 160013.

Frequently asked questions

What is CVE-2019-4261?: IBM WebSphere MQ V7.1, 7.5, IBM MQ V8, IBM MQ V9.0LTS, IBM MQ V9.1 LTS, and IBM MQ V9.1 CD are vulnerable to a denial of service attack caused by specially crafted messages. IBM X-Force ID: 160013.
How severe is CVE-2019-4261?: CVE-2019-4261 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2019-4261 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-4261?: CVE-2019-4261 primarily affects Ibm Mq. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2019-4261?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-4261 published?: CVE-2019-4261 was published on 2019-08-05 and last updated on 2026-06-17.

References

Affected products (4)

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

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