CVE-2011-1889

CRITICAL
9.8
CVSS Score
Published: June 16, 2011 at 08:21 PM UTC
Updated: June 16, 2026 at 11:30 PM UTC
1 product affected across 1 vendorForefront Threat Management Gateway

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Severity
CRITICAL9.8
Exploitation
CISA KEV
Exploit prediction
EPSS 49%
SSVC
Active

Actively Exploited

CISA Known Exploited Vulnerabilities (KEV) Catalog

EPSS Score49.0%

EPSS (Exploit Prediction Scoring System) estimates a 49.0% chance this CVE is exploited in the wild within the next 30 days — higher than 99% of all CVEs. It complements CVSS: a high EPSS on a mid-severity CVE can still be urgent.

A remote code execution vulnerability exists in the Forefront Threat Management Gateway (TMG) Firewall Client Winsock provider that could allow code execution in the security context of the client application.

Required Action
Apply updates per vendor instructions.
Ransomware Use
Unknown
Added to KEV
Mar 3, 2022
Remediation Due
Mar 24, 2022
1677 days overdue

Description

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (7)

Third Party Advisoryx_refsource_SECUNIABroken Link
http://secunia.com/advisories/44857
VDB Entryx_refsource_BIDBroken LinkThird Party Advisory
http://www.securityfocus.com/bid/48181
VDB Entryx_refsource_SECTRACKBroken LinkThird Party Advisory
http://www.securitytracker.com/id?1025637
VDB Entryx_refsource_XFThird Party Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/67736
US Government Resource
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2011-1889

SSVC — Action Prioritization

SSVCActiveAutomatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

9.8CRITICALCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-119

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