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CVE-2026-48850

PuTTY 0.72 before 0.84 has a double free in RSA KEX.

Published: May 25, 2026Updated: May 26, 2026 Sources: CVE List
NVD MITRE
3.7CVSS
LOW

PuTTY 0.72 before 0.84 has a double free in RSA KEX.

EPSS Score
0.0%
Top 88.2%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

CVSS Vector Breakdown

AV:NAC:HPR:NUI:NS:UC:NI:NA:L
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:LAvailability
Low

Weaknesses

CWE-415CWE-415 Double Free

Affected Products

PuTTY
PuTTY

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

MITRE ATT&CK

1 technique
Privilege Escalation
View detailed technique mapping

References

https://lists.tartarus.org/pipermail/putty-announce/2026/000042.html
lists.tartarus.org
https://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/rsakex-double-free.html
chiark.greenend.org.uk

Timeline

Published
May 25, 2026
Last Updated
May 26, 2026

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