CVE-2025-45663

Name: CVE-2025-45663
Creator: NVD / NIST
Published: 2025-11-03T15:15:35.51+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.31%

Last modified Jun 17, 2026

CVE-2025-45663 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. An issue in NetSurf v3.11 causes the application to read uninitialized heap memory when creating a dom_event structure.. EPSS estimates a 0.31% chance of exploitation in the next 30 days.

Description

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

Metrics

CVSS 3.1

6.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L

EPSS Probability

0.31%

22.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-244

Affected Software

Vendor	Product	Versions
Netsurf-Browser	Netsurf	3.11

References

https://github.com/Fysac/netsurf-disclosure/tree/main/CVE-2025-45663Exploit, Third Party Advisory
https://www.netsurf-browser.org/Product

Timeline

Published: Nov 3, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-45663?

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

How severe is CVE-2025-45663?

CVE-2025-45663 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.31% probability of exploitation in the next 30 days.

How do I fix CVE-2025-45663?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-45663?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST