How severe is CVE-2011-2007?

CVE-2011-2007 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2011-2007 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 24% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-2007?

CVE-2011-2007 primarily affects Microsoft Host Integration Server. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-2007?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2011-2007 published?

CVE-2011-2007 was published on 2011-10-12 and last updated on 2026-06-16.

CVE-2011-2007

CVE-2011-2007 is a medium-severity vulnerability in Microsoft Host Integration Server with a CVSS 2.0 base score of 5.0. Its EPSS exploit-prediction score of 24% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-20.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 24% (98th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Microsoft Host Integration Server
Published: 2011-10-12
Last modified: 2026-06-16

Description

Microsoft Host Integration Server (HIS) 2004 SP1, 2006 SP1, 2009, and 2010 allows remote attackers to cause a denial of service (SNA Server service outage) via crafted TCP or UDP traffic, aka "Endless Loop DoS in snabase.exe Vulnerability."

Frequently asked questions

What is CVE-2011-2007?: Microsoft Host Integration Server (HIS) 2004 SP1, 2006 SP1, 2009, and 2010 allows remote attackers to cause a denial of service (SNA Server service outage) via crafted TCP or UDP traffic, aka "Endless Loop DoS in snabase.exe Vulnerability."
How severe is CVE-2011-2007?: CVE-2011-2007 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2011-2007 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 24% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-2007?: CVE-2011-2007 primarily affects Microsoft Host Integration Server. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-2007?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-2007 published?: CVE-2011-2007 was published on 2011-10-12 and last updated on 2026-06-16.

References

Affected products (4)

cpe:2.3:a:microsoft:host_integration_server:2004:sp1:*:*:*:*:*:*
cpe:2.3:a:microsoft:host_integration_server:2006:sp1:*:*:*:*:*:*
cpe:2.3:a:microsoft:host_integration_server:2009:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:host_integration_server:2010:*:*:*:*:*:*:*

More vulnerabilities in Microsoft Host Integration Server

CVE-2023-38151 — High (CVSS 8.8): Microsoft Host Integration Server 2020 Remote Code Execution Vulnerability
CVE-2012-1856 — High (CVSS 8.8): The TabStrip ActiveX control in the Common Controls in MSCOMCTL.OCX in Microsoft Office 2003 SP3, Office 2003 Web…
CVE-2011-2008 — Medium (CVSS 5.0): Microsoft Host Integration Server (HIS) 2004 SP1, 2006 SP1, 2009, and 2010 allows remote attackers to cause a denial of…

All CVEs affecting Microsoft Host Integration Server →

Other CWE-20 (Improper Input Validation) vulnerabilities

CVE-2026-48316 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48281 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48277 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48055 — Critical (CVSS 10.0): Streambert is a cross-platform Electron Desktop App to stream and download any video media. In versions 2.4.0 and…
CVE-2026-34910 — Critical (CVSS 10.0): A malicious actor with access to the network could exploit an Improper Input Validation vulnerability found in UniFi OS…
CVE-2026-33587 — Critical (CVSS 10.0): Lack of user input sanitisation in Open Notebook v1.8.3 allows the application user to execute Python code (and…

Browse all CWE-20 (Improper Input Validation) vulnerabilities →