Telnet Client Information Disclosure Vulnerability
Out-of-bounds read in Telnet Client allows an unauthorized attacker to disclose information over a network.
MSRC compact vulnerability detail
CVE-2026-35423 · Windows 11 Telnet Client Information Disclosure Vulnerability
Out-of-bounds read in Telnet Client allows an unauthorized attacker to disclose information over a network.
Signals
Telnet Client
Information Disclosure
Exploited: No
Publicly disclosed: No
Exploitability: Exploitation Unlikely
CWE
Patch Diff
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Resolved binary override
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Description
Out-of-bounds read in Telnet Client allows an unauthorized attacker to disclose information over a network.
FAQ / Articles
FAQ
According to the CVSS metrics, successful exploitation of this vulnerability could lead to some loss of confidentiality (C:L), no loss to integrity (I:N) and lead to some loss of availability (A:L). What is the impact of this vulnerability? Successful exploitation of this vulnerability could allow an attacker to access limited sensitive information from system memory and may cause intermittent interruptions or reduced performance in the affected application. However, it would not allow the attacker to modify data.
FAQ
What type of information could be disclosed by this vulnerability? An attacker could potentially read limited portions of memory from the affected system, which may include sensitive information being processed by the Telnet client at the time of the connection.
FAQ
According to the CVSS metric, user interaction is required (UI:R). What interaction would the user have to do? For this vulnerability to be exploited, a user would need to initiate a Telnet connection to a malicious or compromised server, allowing specially crafted authentication responses to be processed by the Telnet client. Successful exploitation requires a user to take an action before the vulnerability can be triggered.