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Threatist priority CRITICAL 0 HIGH 0 MEDIUM 1 LOW 1

Signals Exploited in the wild (KEV) 0 Patch available 1 No fix listed 1 Has CVE 2

Fix status Fixed 1 Partial 0 Will not fix 0 Deferred 0 No fix listed 1

Attack vector Network 2 Adjacent network 0 Local 0 Physical 0

Requirements No authentication 2 No user interaction 1

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Weakness (CWE) CWE-122 Heap-based Buffer Overflow 1 CWE-1395 Dependency on Vulnerable Third-Party Component 1 CWE-190 Integer Overflow or Wraparound 1 CWE-20 Improper Input Validation 1

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Vendor: FastCGI × Component: Fcgi × Clear all filters

TI-2025-27301 CVE-2025-40907 · GHSA-488m-4fx8-f36v

Heap-based buffer overflow in ether FCGI

Priority MEDIUM 57

FCGI versions 0.44 through 0.82, for Perl, include a vulnerable version of the FastCGI fcgi2 (aka fcgi) library.

CVSS 3.1MEDIUM 5.3· Network · No auth · No interaction · EPSS 0.00676 · Published 2025-05-16 · Fixed CWE-122

TI-2012-05391 CVE-2012-6687 · GHSA-v5rv-9c87-6gww

FastCGI (aka fcgi and libfcgi) 2.4.0 allows remote attackers to cause a denial of service…

Priority LOW 32

FastCGI (aka fcgi and libfcgi) 2.4.0 allows remote attackers to cause a denial of service (segmentation fault and crash) via a large number of connections.

CVSS 2.0MEDIUM 5.0· Network · No auth · Interaction — · EPSS 0.06086 · Published 2015-02-19 · No fix listed CWE-20

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