CVE-2025-54939

MEDIUM
2025-08-01 [email protected]
5.3
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low

Lifecycle Timeline

3
Analysis Generated
Mar 28, 2026 - 19:04 vuln.today
PoC Detected
Aug 27, 2025 - 15:52 vuln.today
Public exploit code
CVE Published
Aug 01, 2025 - 06:15 nvd
MEDIUM 5.3

Tags

Denial Of Service Litespeed Web Adc Litespeed Web Server Lsquic Openlitespeed

Description

LiteSpeed QUIC (LSQUIC) Library before 4.3.1 has an lsquic_engine_packet_in memory leak.

Analysis

LiteSpeed QUIC (LSQUIC) Library before 4.3.1 has an lsquic_engine_packet_in memory leak. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Technical Context

This vulnerability is classified as Allocation of Resources Without Limits (CWE-770), which allows attackers to exhaust system resources through uncontrolled allocation. LiteSpeed QUIC (LSQUIC) Library before 4.3.1 has an lsquic_engine_packet_in memory leak. Affected products include: Litespeedtech Litespeed Web Adc, Litespeedtech Litespeed Web Server, Litespeedtech Lsquic, Litespeedtech Openlitespeed. Version information: before 4.3.1.

Affected Products

Litespeedtech Litespeed Web Adc, Litespeedtech Litespeed Web Server, Litespeedtech Lsquic, Litespeedtech Openlitespeed.

Remediation

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Set resource limits, implement rate limiting, validate input sizes.

Priority Score

47
Low Medium High Critical
KEV: 0
EPSS: +0.1
CVSS: +26
POC: +20

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CVE-2025-54939 vulnerability details – vuln.today
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