How severe is CVE-2026-11537?

CVE-2026-11537 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2026-11537 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-11537?

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

When was CVE-2026-11537 published?

CVE-2026-11537 was published on 2026-09-18 and last updated on 2026-09-19.

CVE-2026-11537

CVE-2026-11537 is a medium-severity vulnerability with a CVSS 3.x base score of 4.3. 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-650.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
EPSS exploit prediction: 0% (7th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-650
Published: 2026-09-18
Last modified: 2026-09-19

Description

IBM WebSphere Application Server 9.0, and 8.5 could allow a remote attacker to obtain sensitive information about the file system through the FileTransfer servlet.

Frequently asked questions

What is CVE-2026-11537?: IBM WebSphere Application Server 9.0, and 8.5 could allow a remote attacker to obtain sensitive information about the file system through the FileTransfer servlet.
How severe is CVE-2026-11537?: CVE-2026-11537 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2026-11537 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-11537?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-11537 published?: CVE-2026-11537 was published on 2026-09-18 and last updated on 2026-09-19.

References

https://www.ibm.com/support/pages/node/7286610

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