CVE-2026-48851

CVSS 3.1 LOWEPSS 0.2%CWE-451

Vexday Risk Score

8Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 3.1EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

25 May 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N

Affected products

PuTTY · PuTTY

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References

https://lists.tartarus.org/pipermail/putty-announce/2026/000042.html https://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/telnet-trust-sigil.html