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CVE-2011-1889

88
FAUCET Score

CVE-2011-1889 is a critical memory corruption vulnerability affecting the NSPLookupServiceNext function in Microsoft Forefront Threat Management Gateway (TMG) 2010 client, allowing remote attackers to execute arbitrary code. With a CVSS score of 9.8 (Critical), it presents a severe risk due to its network-based attack vector, low attack complexity, and complete compromise of confidentiality, integrity, and availability. This vulnerability is actively exploited in the wild, as confirmed by its presence in the KEV catalog, despite a lack of public exploit code in Metasploit or ExploitDB. The vulnerability has garnered significant community discussion, indicating widespread awareness and concern.

Impacted Technologies

VendorProductVersion(s)CPE
2010CPE matchmatch criteria
cpe:2.3:a:microsoft:forefront_threat_management_gateway:2010:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

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
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
48.37%
Probability of exploitation in next 30 days
EPSS Percentile
98.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
Added to KEV · Mar 3, 2022
This CVE's current EPSS score of 0.4837 is in the 96th percentile among its peer group of 36,833 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

cisa.gov / known-exploited-vulnerabilities-catalog
US Government Resource
docs.microsoft.com / en-us/security-updates/securitybulletins/2011/ms11-040
PatchVendor Advisory
secunia.com / advisories/44857
Broken Link
exchange.xforce.ibmcloud.com / vulnerabilities/67736
Third Party AdvisoryVDB Entry
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12642
Broken Link
securityfocus.com / bid/48181
Broken LinkThird Party AdvisoryVDB Entry
securitytracker.com / id
Broken LinkThird Party AdvisoryVDB Entry