CVE-2026-48850
LOW severity · CVSS 3.7 · Double free
3.7CVSS LOW
Summary
PuTTY 0.72 before 0.84 has a double free in RSA KEX.
Impact & exploitability
Attack vectorNetwork
Attack complexityHigh
Privileges requiredNone
User interactionNone
Confidentiality impactNone
Integrity impactNone
Availability impactLow
Exploit probability (EPSS)0%
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Affected products we track (1)
Recommendation
Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.
Official patch: https://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/rsakex-double-free.html ↗