CISA KEV · Known exploitedCritical

CVE-2011-1889

Microsoft Forefront Threat Management Gateway (TMG)

The NSPLookupServiceNext function in the client in Microsoft Forefront Threat Management Gateway (TMG) 2010 allows remote attackers to execute arbitrary code via vectors involving unspecified requests, aka "TMG Firewall Client Memory Corruption Vulnerability."

CVSS
9.8
EPSS
48.4%
98.7% percentile
CISA KEV
Listed
Published
2011.06.17
PRIORITY ASSESSMENT

Immediate review

CISA has listed this vulnerability in the Known Exploited Vulnerabilities catalog.

Known exploitationConfirmed by CISA KEV
Exploit probability48.4%
Technical severityCVSS 9.8

Vulnerability overview

The NSPLookupServiceNext function in the client in Microsoft Forefront Threat Management Gateway (TMG) 2010 allows remote attackers to execute arbitrary code via vectors involving unspecified requests, aka "TMG Firewall Client Memory Corruption Vulnerability."

Affected product and versions

Product
Microsoft Forefront Threat Management Gateway (TMG)
Affected versions
2010
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
CISA required action

Apply updates per vendor instructions.

Due date: 2022.03.24
  1. 1
    Identify

    Confirm that Microsoft Forefront Threat Management Gateway (TMG) and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-119
KEV added
2022.03.03
Ransomware use
미확인
CVE-2011-1889 — Microsoft Forefront Threat Management Gateway (TMG) | SECUFOCUS NOW