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

> CVE-2011-1889: Microsoft Forefront TMG Remote Code Execution Vulnerability. CVSS 9.8 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2011-1889
Last updated: 2025-10-22T00:05:49Z

- Published: 2011-06-16 20:21 UTC · Updated: 2025-10-22 00:05 UTC · Assigner: microsoft
- CVSS: 9.8 (CVSS 3.1) · Severity: Critical · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS: 49.0%, 99th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2022-03-03, federal due date 2022-03-24, ransomware use: Unknown

## 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."

## CISA required action

Apply updates per vendor instructions.

## Affected vendors and products

- Microsoft: Forefront Threat Management Gateway (TMG)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2011-1889)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2011-1889)
- [https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-040](https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-040)
- [http://secunia.com/advisories/44857](http://secunia.com/advisories/44857)
- [https://exchange.xforce.ibmcloud.com/vulnerabilities/67736](https://exchange.xforce.ibmcloud.com/vulnerabilities/67736)
- [https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12642](https://oval.cisecurity.org/repository/search/definition/oval%253Aorg.mitre.oval%253Adef%253A12642)
- [http://www.securityfocus.com/bid/48181](http://www.securityfocus.com/bid/48181)
- [http://www.securitytracker.com/id?1025637](http://www.securitytracker.com/id?1025637)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2011-1889 · Markdown: https://rewindex.com/cve/CVE-2011-1889.md · JSON: https://rewindex.com/api/v1/cves/CVE-2011-1889 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:01:47.901Z