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Vulnerabilities

Vulnerability · CVE-2025-45663

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

Published Nov 3, 2025 · catalog updated Nov 4, 2025 · An issue in NetSurf

Last checked Nov 1, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-45663. EPSS is 0.37%. Act only if a listed version of An issue in NetSurf is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (An issue in NetSurf).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Medium6.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.37%
Remediation
Vendor / distro source
Affected products
vendor n/a n/a n/a

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

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor n/a n/a n/an/a

How to fix CVE-2025-45663

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-45663. EPSS is 0.37%. Act only if a listed version of An issue in NetSurf is installed.

Which versions are affected?

Compare what you have installed with n/a n/a n/a n/a. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.37%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Nov 3, 2025 · EUVD

    Detected

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

  2. Nov 4, 2025 · EUVD

    Updated

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

Sources

  • CVE.orgVulnerability recordCVE-2025-45663

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-45663

    30-day exploitation probability 0.37%

    first.org
  • EUVDVulnerability recordEUVD-2025-37484

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

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 1, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 1, 2026
  • CVE.orgOct 25, 2026
  • EUVDOct 25, 2026