How severe is CVE-2009-1088?

CVE-2009-1088 has a CVSS 2.0 base score of 9.0, rated critical severity.

Is CVE-2009-1088 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 12% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-1088?

CVE-2009-1088 affects Hannonhill Cascade. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2009-1088?

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-2009-1088 published?

CVE-2009-1088 was published on 2009-03-25 and last updated on 2026-06-16.

CVE-2009-1088

CVE-2009-1088 is a critical-severity vulnerability in Hannonhill Cascade with a CVSS 2.0 base score of 9.0. Its EPSS exploit-prediction score of 12% places it in the 96th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-94.

Key facts

Severity: Critical (CVSS 2.0 base score 9.0)
EPSS exploit prediction: 12% (96th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Hannonhill Cascade
Published: 2009-03-25
Last modified: 2026-06-16

Description

Hannon Hill Cascade Server 5.7 and other versions allows remote authenticated users to execute arbitrary programs or Java code via a crafted XSLT stylesheet with "extension elements and extension functions" that trigger code execution by Xalan-Java, as demonstrated using xalan://java.lang.Runtime.

Frequently asked questions

What is CVE-2009-1088?: Hannon Hill Cascade Server 5.7 and other versions allows remote authenticated users to execute arbitrary programs or Java code via a crafted XSLT stylesheet with "extension elements and extension functions" that trigger code execution by Xalan-Java, as demonstrated using xalan://java.lang.Runtime.
How severe is CVE-2009-1088?: CVE-2009-1088 has a CVSS 2.0 base score of 9.0, rated critical severity.
Is CVE-2009-1088 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 12% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-1088?: CVE-2009-1088 affects Hannonhill Cascade. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2009-1088?: 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-2009-1088 published?: CVE-2009-1088 was published on 2009-03-25 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:hannonhill:cascade:5.7:svr:*:*:*:*:*:*

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