CVE-2009-1135
HIGHEPSS 98th pctlDescription
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."
CVSS v2 Vector
No CVSS vector data available.
Exploit Intelligence
Very high risk: more likely to be exploited than 98% of all known CVEs.
References
- http://secunia.com/advisories/35784
- http://www.securitytracker.com/id?1022547
- http://www.us-cert.gov/cas/techalerts/TA09-195A.html
- http://www.vupen.com/english/advisories/2009/1889
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-031
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5649
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Start freeThis product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-23.