Vulnerability Details CVE-2021-33500
PuTTY before 0.75 on Windows allows remote servers to cause a denial of service (Windows GUI hang) by telling the PuTTY window to change its title repeatedly at high speed, which results in many SetWindowTextA or SetWindowTextW calls. NOTE: the same attack methodology may affect some OS-level GUIs on Linux or other platforms for similar reasons.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.004
EPSS Ranking 59.6%
CVSS Severity
CVSS v3 Score 7.5
CVSS v2 Score 5.0
Products affected by CVE-2021-33500
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cpe:2.3:a:putty:putty:0.45
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cpe:2.3:a:putty:putty:0.46
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cpe:2.3:a:putty:putty:0.47
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cpe:2.3:a:putty:putty:0.48
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cpe:2.3:a:putty:putty:0.49
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cpe:2.3:a:putty:putty:0.50
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cpe:2.3:a:putty:putty:0.51
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cpe:2.3:a:putty:putty:0.52
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cpe:2.3:a:putty:putty:0.53
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cpe:2.3:a:putty:putty:0.53b
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cpe:2.3:a:putty:putty:0.54
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cpe:2.3:a:putty:putty:0.55
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cpe:2.3:a:putty:putty:0.56
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cpe:2.3:a:putty:putty:0.57
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cpe:2.3:a:putty:putty:0.58
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cpe:2.3:a:putty:putty:0.59
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cpe:2.3:a:putty:putty:0.60
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cpe:2.3:a:putty:putty:0.61
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cpe:2.3:a:putty:putty:0.62
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cpe:2.3:a:putty:putty:0.63
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cpe:2.3:a:putty:putty:0.65
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cpe:2.3:a:putty:putty:0.66
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cpe:2.3:a:putty:putty:0.67
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cpe:2.3:a:putty:putty:0.68
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cpe:2.3:a:putty:putty:0.69
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cpe:2.3:a:putty:putty:0.70
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cpe:2.3:a:putty:putty:0.71
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cpe:2.3:a:putty:putty:0.72
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cpe:2.3:a:putty:putty:0.73
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cpe:2.3:a:putty:putty:0.74
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cpe:2.3:o:microsoft:windows:-