CVE-2011-4266

CVE-2011-4266 is a critical-severity vulnerability in Ffftp with a CVSS 2.0 base score of 9.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Description

Untrusted search path vulnerability in FFFTP before 1.98d allows local users to gain privileges via a Trojan horse executable file in a directory that is accessed for reading an extensionless file, as demonstrated by executing the README.exe file when a user attempts to access the README file, a different vulnerability than CVE-2011-3991.

Frequently asked questions

What is CVE-2011-4266?
Untrusted search path vulnerability in FFFTP before 1.98d allows local users to gain privileges via a Trojan horse executable file in a directory that is accessed for reading an extensionless file, as demonstrated by executing the README.exe file when a user attempts to access the README file, a different vulnerability than CVE-2011-3991.
How severe is CVE-2011-4266?
CVE-2011-4266 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2011-4266 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-4266?
CVE-2011-4266 primarily affects Ffftp. In total, 39 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-4266?
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-2011-4266 published?
CVE-2011-4266 was published on 2011-12-13 and last updated on 2026-06-16.

References

Affected products (39)

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