CVE Watch14 oct 2026

CVE-2021-3177

Python 3.x through 3.9.1 has a buffer overflow in PyCArg_repr in _ctypes/callproc.c, which may lead to remote code execution in certain Pyth

CVSS

9.8

Crítico

EPSS

24.2%

p98

KEV

—

Exploit Today

0-100

Publicado: 19 ene 2021 · Última mod.: 14 oct 2026 · CWE-120

EPSS · 30d

23.3%EPSS · 30 días24.2%

2026-09-242026-10-23

Descripción técnica

Python 3.x through 3.9.1 has a buffer overflow in PyCArg_repr in _ctypes/callproc.c, which may lead to remote code execution in certain Python applications that accept floating-point numbers as untrusted input, as demonstrated by a 1e300 argument to c_double.from_param. This occurs because sprintf is used unsafely.

Referencias oficiales

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