CVE & CISA-KEV CatalogNVD
CVE-2009-4873
HIGHEPSS 97th pctl10.0
CVSS v2
Description
Stack-based buffer overflow in the HTTP server in Rhino Software Serv-U Web Client 9.0.0.5 allows remote attackers to cause a denial of service (server crash) or execute arbitrary code via a long Session cookie.
CVSS v2 Vector
No CVSS vector data available.
Exploit Intelligence
20.55%probability of exploitation in 30 days
97thpercentile
Very high risk: more likely to be exploited than 97% of all known CVEs.
References
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Start freeThis product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-29.