Windows apps · Application version · May 25, 2026

PuTTY CAC 0.84.0.0

PuTTY CAC 0.84.0.0, released May 25, 2026, fixes 3 CVEs in PuTTY CAC. None of them is reported as exploited. Patch Radar priority: Routine. The latest PuTTY CAC is 0.85.2.0, which also fixes every one of these CVEs.

Routine

Superseded. The latest PuTTY CAC is 0.85.2.0, which also fixes every CVE on this page. Install that instead.

CVEs closed

None rated Critical

Exploited

None reported

Highest CVSS

5.9

Base score, 0 to 10

Highest EPSS

0.0032

25th percentile

Priority of the 3 CVEs

Patch now 0
                                Urgent 0
                                High 0
                                Routine 3

Applies to

Product	Version
PuTTY CAC	0.84.0.0

CVEs this fix closes

Priority	CVE	Title	CVSS	EPSS	Exploitation
Routine	CVE-2026-48850	PuTTY and 1 other: Double Free	5.9	0.0032	None reported
Routine	CVE-2026-48852	PuTTY and 1 other: Reachable Assertion	3.7	0.0028	None reported
Routine	CVE-2026-48851	PuTTY CAC and 1 other: User Interface (UI) Misrepresentation of Critical Information	3.1	0.0022	None reported

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