HOMEVULNERABILITIESCVE-2017-7269
HIGHCISA KEVIN THE WILD

CVE-2017-7269

Published: November 3, 2021

EPSS:94.41%probability of exploitation in 30 daysPercentile:100.0th

Official Description

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.

NVD Source

CISA KEV Advisory

Microsoft Windows Server Buffer Overflow Vulnerability

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.

Added to KEV: 2021-11-03Federal patch deadline: 2022-05-03
Required Action (CISA)

Apply updates per vendor instructions.

Risk Analysis

Microsoft Windows Server 2003 R2's Internet Information Services (IIS) 6.0 contains a buffer overflow vulnerability. This flaw allows remote attackers to execute arbitrary code by sending a specially crafted PROPFIND request with a long 'If:' header. The high EPSS score of 0.94411 indicates a very high likelihood of exploitation, making this a critical vulnerability.

This vulnerability is actively exploited in the wild and is listed in CISA's KEV catalog, confirming its confirmed exploitation. The remote code execution capability makes it a severe threat.

Recommended Action

Upgrade from Windows Server 2003 R2 to a supported operating system, as it is end-of-life. If immediate upgrade is not possible, restrict network access to IIS 6.0 and apply any available workarounds.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2017-7269 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CISA has added CVE-2017-7269 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.

Affected Vendors & Products

Mentioned vendors (from description):
Microsoft
CPE data not yet available in NVD for this CVE.

Exploit & PoC Resources

ACTIVE EXPLOITATIONConfirmed exploitation in the wild
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All References (1)

Quick Facts

CVE IDCVE-2017-7269
SeverityHIGH
CISA KEVYES — Active Exploitation
ExploitIN THE WILD
EPSS (30d)94.41%
PublishedNov 3, 2021

Recommended Actions

  • Apply vendor patches immediately
  • Monitor CVE-2017-7269 in threat intel feeds
  • Review IDS/IPS signatures for exploitation attempts
  • !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
  • !Active exploitation confirmed — treat as P1
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.