CVE-2009-4873

CVE-2009-4873 is a critical-severity vulnerability in Rhinosoft Serv-u with a CVSS 2.0 base score of 10.0. Its EPSS exploit-prediction score of 21% places it in the 97th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-119.

Key facts

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.

Frequently asked questions

What is CVE-2009-4873?
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.
How severe is CVE-2009-4873?
CVE-2009-4873 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-2009-4873 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 21% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-4873?
CVE-2009-4873 affects Rhinosoft Serv-u. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2009-4873?
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-2009-4873 published?
CVE-2009-4873 was published on 2010-05-26 and last updated on 2026-06-16.

References

Affected products (1)

Other CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) vulnerabilities

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