Applied Cybernetics Group Sat, Nov 7, 2026 · data 12:17Z
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Apache Struts 1 ActionForm Denial-of-Service Vulnerability

Added to KEV
2022-01-21
Federal due date
2022-07-21
Vendor
Apache
Product
Struts 1
EPSS
99.0th percentile (score 0.546, as of 2026-11-06)
NVD CVSS v3.1
—
Ransomware use
Unknown
Upstream
https://nvd.nist.gov/vuln/detail/CVE-2006-1547

CISA short description

ActionForm in Apache Struts versions before 1.2.9 with BeanUtils 1.7 contains a vulnerability that allows for denial-of-service (DoS).

Required action

Apply updates per vendor instructions.

EPSS percentile is the FIRST.org exploit-probability ranking as of the date noted above; it moves daily. CVSS reflects NVD's analysis at time of publication.