THREATPORT/VULNERABILITY/CVE-2011-1961
HIGH SEVERITY

CVE-2011-1961

Internet Explorer vulnerability

CVSS
9.3
EPSS
34.3%
EPSS pct
98th
Exploited
No known
The telnet URI handler in Microsoft Internet Explorer 6 through 9 does not properly launch the handler application, which allows remote attackers to execute arbitrary programs via a crafted web site, aka "Telnet Handler Remote Code Execution Vulnerability."
Affected vendor
Microsoft
Affected product
Internet Explorer
CVSS vector
AV:N/AC:M/Au:N/C:C/I:C/A:C
Published
2011-08-10

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, medium attack complexity, requiring no authentication. Successful exploitation leads to complete impact to confidentiality, complete impact to integrity, complete impact to availability.

Its EPSS score of 34.3% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 98% of all scored CVEs.

Check your external exposure to CVE-2011-1961

  • Confirm whether Microsoft Internet Explorer is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2011-1961.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2011-1961

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2011-1961 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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