Medium severity · published Nov 3, 2025
CVE-2025-45663
An issue in NetSurf v3.11 causes the application to read uninitialized heap memory when creating a dom_event structure
6.5
CVSS
0.4%
EPSS
No
On KEV
Description
An issue in NetSurf v3.11 causes the application to read uninitialized heap memory when creating a dom_event structure.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 31% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NE
Netsurf · Netsurf-browser
3.11 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-45663
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-45663
Exploit
https://github.com/Fysac/netsurf-disclosure/tree/main/CVE-2025-45663
Product
https://www.netsurf-browser.org/
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