CVE-2009-1135
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."
Key facts
- CVSS score
- 9.0 (v2.0)
- Severity
- HIGH
- CVSS vector
AV:N/AC:L/Au:S/C:C/I:C/A:C- Weakness (CWE)
- CWE-264
- EPSS score
- 26.5% (98th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2009-1136)
- Published
- July 15, 2009
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2009-1136 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.
View on the EU Vulnerability DatabaseAffected products
- microsoft / isa server
- microsoft / isa server
- microsoft / isa server
References
- http://secunia.com/advisories/35784
- http://www.securitytracker.com/id?1022547
- http://www.us-cert.gov/cas/techalerts/TA09-195A.html(US Government Resource)
- 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
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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