VulnerabilityAnalyzed

CVE-2026-48851

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.

LOW 3.1EPSS 0.22%

Does this matter?

Lower severity and a low EPSS score (0.22%). Track it; it rarely justifies an emergency change on its own.

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.

CVSS 3.1: 3.1 LOWCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N
EPSS: 0.22% probability · 13th percentile
CISA KEV: Not listed
Weakness: CWE-451
Affected: putty/putty
Source: cve@mitre.org

References

https://lists.tartarus.org/pipermail/putty-announce/2026/000042.htmlRelease Notes
https://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/telnet-trust-sigil.htmlPatch, Vendor Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.