9

CVE-2009-1135: microsoft isa_server

CVSS: 9.0v2.0HighModified
Published 15-07-2009Last modified 07-08-2024
Open JSON

Vulnerability summary

CVE-2009-1135 is a high (CVSS 9.0) vulnerability in microsoft isa_server. EPSS estimates a 26.45% chance of exploitation in the next 30 days, higher than 97.9% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.0/10
010
High · v2.0 (NVD)
EPSS score
26.45%
0%100%
High · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 15-07-2009
    PublishedVulnerability first disclosed.
  2. 07-08-2024
    Last modifiedVulnerability information updated.

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."

CVSS metrics

1 score · 1 source · 1 version

EPSS trend

Probability

26.45%

Chance of exploitation in the next 30 days

Percentile

98%

Versus all other CVEs

30-day change

0.00 pp

From 26.45% on 19-09-2026

19-09-202619-10-2026
EPSS score
26.45%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Microsoft1 product

1 vendor · 1 product

References

6 links