CVE-2009-1135

critical Microsoft
CVSS v3 Base Score
9.0
AV:N/AC:L/Au:S/C:C/I:C/A:C
EPSS Score
39.4%
Exploitation probability in 30 days
Top 3% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
Low
Confidentiality
C
Integrity
C
Availability
C
Published: July 15, 2009 (6147 days ago)
Last Modified: April 23, 2026
Vendor: Microsoft
Source: NVD

Description

Microsoft Internet Security and Acceleration (ISA) Server 2006 Gold and SP1, when Radius OTP is enabled, uses the HTTP-Basic authentication method, which allows remote attackers to gain the privileges of an arbitrary account, and access published web pages, via vectors involving attempted access to a network resource behind the ISA Server, aka "Radius OTP Bypass Vulnerability."

CWE

CWE-264

Affected Products

microsoft isa server

References

🔗 secunia.com 🔗 www.securitytracker.com 🔗 www.us-cert.gov 🔗 www.vupen.com 🔗 docs.microsoft.com