CVE-2011-1889Microsoft Forefront TMG Remote Code Execution Vulnerability

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."

9.8 CRITICALEPSS 49.02%⚡ Known Exploited (CISA KEV)NVD: Analyzed

Last updated: 2026-06-16 23:30 UTC

OverviewCVSS details

9.8CRITICALCVSS 3.1

Score source: NVD
NVD status: Analyzed
Published: Jun 16, 2011
Assigner: microsoft

Affected

forefront threat management gateway (microsoft)

Versions: 2010

Exploitation

Public exploit: None listed
CISA KEV: Listed · Mar 3, 2022
KEV due date: Mar 24, 2022
Ransomware use: Unknown
SSVC: Exploitation active · Automatable yes · Impact total

EPSS · FIRST, scored Nov 7

49.02%chance of exploitation in 30 days

Higher than 98.88% of CVEs

CVSS 3.1 · NVD

9.8Critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: High

CVSS 2.0 · NVD

10.0High

AV:N/AC:L/Au:N/C:C/I:C/A:C

Attack vector: Network
Attack complexity: Low
Authentication: None
Confidentiality impact: Complete
Integrity impact: Complete
Availability impact: Complete

NVD status: Analyzed

Overview Affected Products References

NVD CVE.org

Overview

Severity

Score	Severity	Version	Vector String
9.8	CRITICAL	3.1NVD	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
10.0	HIGH	2.0NVD	AV:N/AC:L/Au:N/C:C/I:C/A:C

CISA required action

⚡ Known exploited · remediation due Mar 24, 2022

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Details

CVE ID: CVE-2011-1889
Status: Analyzed
Assigner (CNA): microsoft
Published: Jun 16, 2011
Last modified: 2026-06-16 23:30 UTC
Weaknesses: CWE-119

Sources

Refreshed hourly from the sources above. Last fetched 2026-11-08 11:59 UTC.