VULNERABILITY INTELLIGENCE

CVE-2009-3720

CVSS score5 MEDIUM
EPSS probability27.92%
CISA KEVNot currently listed
Published2009-11-03
Last modified2026-07-20
CVSS vectorAV:N/AC:L/Au:N/C:N/I:N/A:P

Description

The updatePosition function in lib/xmltok_impl.c in libexpat in Expat 2.0.1, as used in Python, PyXML, w3c-libwww, and other software, allows context-dependent attackers to cause a denial of service (application crash) via an XML document with crafted UTF-8 sequences that trigger a buffer over-read, a different vulnerability than CVE-2009-2625.

Primary references