CVE-2009-1135
Microsoft Internet Security and Acceleration (ISA) Server 2006 Gold and SP1, when Radius OTP is...
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."
Exploit likelihood
What each source reports
NVD Score used
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."
- Record
CVE-2009-1135- CVSS 2.0
- 9.0 High
AV:N/AC:L/Au:S/C:C/I:C/A:C - Weakness
- CWE-264
- Updated
- 2026-11-02
CVE List No score
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."
- Record
CVE-2009-1135- Updated
- 2026-11-02
EUVDEUVD-2009-1136 No score
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."
- Record
EUVD-2009-1136- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-r622-f8m7-c595 No score
Microsoft Internet Security and Acceleration (ISA) Server 2006 Gold and SP1, when Radius OTP is...
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."
- Record
GHSA-r622-f8m7-c595- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2009-1135 is a high vulnerability (CVSS 9.0) in Microsoft Isa Server, published July 15, 2009. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 26.5%, the 98th percentile. No source names a fixed version.
References
securitytracker.com/id?1022547
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5649
docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-031
vupen.com/english/advisories/2009/1889
us-cert.gov/cas/techalerts/TA09-195A.html
secunia.com/advisories/35784
nvd.nist.gov/vuln/detail/CVE-2009-1135
github.com/advisories/GHSA-r622-f8m7-c595