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Netsurf CVE-2025-45663

MEDIUM
Improper Clearing of Heap Memory Before Release ('Heap Inspection') (CWE-244)
2025-11-03 cve@mitre.org
Information Disclosure Netsurf
6.5
CVSS 3.1
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CVSS VectorNVD

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

Lifecycle Timeline

3
Analysis Generated
Mar 28, 2026 - 19:20 vuln.today
PoC Detected
Nov 05, 2025 - 18:19 vuln.today
Public exploit code
CVE Published
Nov 03, 2025 - 15:15 nvd
MEDIUM 6.5

DescriptionNVD

An issue in NetSurf v3.11 causes the application to read uninitialized heap memory when creating a dom_event structure.

AnalysisAI

An issue in NetSurf v3.11 causes the application to read uninitialized heap memory when creating a dom_event structure. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified under CWE-244. An issue in NetSurf v3.11 causes the application to read uninitialized heap memory when creating a dom_event structure. Affected products include: Netsurf-Browser Netsurf.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

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CVE-2025-45663 vulnerability details – vuln.today
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