CVE-2011-1652

Windows 7 vulnerability

CVSS

5.0

EPSS

12.3%

EPSS pct

96th

Exploited

No known

The default configuration of Microsoft Windows 7 immediately prefers a new IPv6 and DHCPv6 service over a currently used IPv4 and DHCPv4 service upon receipt of an IPv6 Router Advertisement (RA), and does not provide an option to ignore an unexpected RA, which allows remote attackers to conduct man-in-the-middle attacks on communication with external IPv4 servers via vectors involving RAs, a DHCPv6 server, and NAT-PT on the local network, aka a "SLAAC Attack." NOTE: it can be argued that preferring IPv6 complies with RFC 3484, and that attempting to determine the legitimacy of an RA is currently outside the scope of recommended behavior of host operating systems

Affected vendor

Microsoft

Affected product

Windows 7

CVSS vector

AV:N/AC:L/Au:N/C:N/I:P/A:N

Weakness type (CWE)

CWE-16

Published

2011-04-06

Risk analysis

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

Its EPSS score of 12.3% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 96% of all scored CVEs.

Check your external exposure to CVE-2011-1652

Confirm whether Microsoft Windows 7 is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2011-1652.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2011-1652

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2011-1652 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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