Search/CVE-2021-3690
● CVE — High

CVE-2021-3690

A flaw was found in Undertow. A buffer leak on the incoming WebSocket PONG message may lead to memory exhaustion. This flaw allows an attacker to cause a denial of service. The highest threat from this vulnerability is availability.

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CVSS v3.1
7.5 HIGH
EPSS
1.68%
probability of exploitation in 30 days
CISA KEV
Not listed
no confirmed exploitation reported
News coverage
0
sources referencing this CVE
EPSS Trend
Aug 16, 2026 → Aug 21, 2026
▲ 0.28pp
1.39% → 1.68% over 2 tracked changes
CVSS v3.1 Detail
Attack VectorNETWORK
Attack ComplexityLOW
Privileges RequiredNONE
User InteractionNONE
ScopeUNCHANGED
ConfidentialityNONE
IntegrityNONE
AvailabilityHIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Connections
8 relationships
Timeline
disclosure → media coverage
Aug 23, 2022
Disclosure — published as a CVE record. · last revised by NVD Nov 21, 2024