CVE-2011-4800

CVE-2011-4800 is a critical-severity vulnerability in Solarwinds Serv-u File Server with a CVSS 2.0 base score of 9.0. 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-22.

Key facts

Description

Directory traversal vulnerability in Serv-U FTP Server before 11.1.0.5 allows remote authenticated users to read and write arbitrary files, and list and create arbitrary directories, via a "..:/" (dot dot colon forward slash) in the (1) list, (2) put, or (3) get commands.

Frequently asked questions

What is CVE-2011-4800?
Directory traversal vulnerability in Serv-U FTP Server before 11.1.0.5 allows remote authenticated users to read and write arbitrary files, and list and create arbitrary directories, via a "..:/" (dot dot colon forward slash) in the (1) list, (2) put, or (3) get commands.
How severe is CVE-2011-4800?
CVE-2011-4800 has a CVSS 2.0 base score of 9.0, rated critical severity.
Is CVE-2011-4800 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (94th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-4800?
CVE-2011-4800 primarily affects Solarwinds Serv-u File Server. In total, 89 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-4800?
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-2011-4800 published?
CVE-2011-4800 was published on 2011-12-14 and last updated on 2026-06-16.

References

Affected products (89)

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