ACTIVELY EXPLOITED

CVE-2017-7269: Microsoft Windows Server Buffer Overflow Vulnerability

Facts
VendorMicrosoft
ProductInternet Information Services (IIS)
Actively exploitedYes
Added to CISA KEV3 Nov 2021
CISA federal deadline3 May 2022
Weakness (CWE)CWE-119

Required action (CISA's text)

Apply updates per vendor instructions.

Description (NVD)

Microsoft Windows Server 2003 R2 contains a buffer overflow vulnerability in Internet Information Services (IIS) 6.0 which allows remote attackers to execute code via a long header beginning with "If: <http://" in a PROPFIND request.

SOURCES

Other Microsoft flaws

Data from NVD, CISA KEV, FIRST EPSS and vendor advisories. Updated 10 Nov 2026.