CVE-2009-1135

highpriority · attend · 45EPSS 0.265 · 98 %ileEUUS

grimoire priorityP1 · Urgent

Exploitable?

—

no known exploitation

Likely / severe?

26.5% (98th) EPSS

CVSS 9 · high

Is it mine?

2 products

Check your exposure

Who says so?

2 sources

enisa_euvd · nvd

EPSS · scored 2026-10-27

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

Technical severity, 0–10. One row per scoring source.

9.0

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.09highAV:N/AC:L/Au:S/C:C/I:C/A:Cprimary · NVD / NIST USexploitability 8 · impact 10

v2.07.7highAV:N/AC:L/Au:S/C:C/I:C/A:C/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-264USprimary

affected products (2)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
microsoft isa server= 2006nvdUScpe:2.3:a:microsoft:isa_server:*:*:*:*:*:*:*:*

also known as (2)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

enisa_euvd nvd NVD CVE.org MITRE

published 2009-07-15modified 2026-06-16

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+8950 more

references (12)

External citations — patches, advisories, analysis.

scry

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