CVE-2026-48851 Details
Description
PuTTY 0.77 before 0.84 uses a copy of the PuTTY icon as a trust indication for TELNET data but the trust status is not cleared between proxy authentication and the main session.
A vulnerability exists in PuTTY versions 0.77 prior to 0.84, where the application incorrectly maintains a trust indication for TELNET data after proxy authentication. This flaw could mislead users into believing a request from a malicious server was legitimate, potentially exposing sensitive information such as proxy passwords.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed May 26, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://lists.tartarus.org/pipermail/putty-announce/2026/000042.html | [email protected] | Release Notes |
| https://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/telnet-trust-sigil.html | [email protected] | PatchVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-451 | User Interface (UI) Misrepresentation of Critical Information | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| putty putty | >= 0.77, < 0.84 |
CPE
Remediation
| |
Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 24, 2026 | CVE Translated | [email protected] |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 27, 2026 | Initial Analysis | [email protected] |
| May 25, 2026 | New CVE Received | [email protected] |