How severe is CVE-2025-45663?

CVE-2025-45663 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability low.

Is CVE-2025-45663 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-45663?

CVE-2025-45663 affects Netsurf-browser Netsurf. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-45663?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-45663 have an EU (EUVD) identifier?

Yes. CVE-2025-45663 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-37484.

When was CVE-2025-45663 published?

CVE-2025-45663 was published on 2025-11-03 and last updated on 2026-06-17.

CVE-2025-45663

CVE-2025-45663 is a medium-severity vulnerability in Netsurf-browser Netsurf with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-244.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (26th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-37484
Weakness: CWE-244
Affected product: Netsurf-browser Netsurf
Published: 2025-11-03
Last modified: 2026-06-17

Description

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

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 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability low.
Is CVE-2025-45663 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-45663?: CVE-2025-45663 affects Netsurf-browser Netsurf. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-45663?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-45663 have an EU (EUVD) identifier?: Yes. CVE-2025-45663 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-37484.
When was CVE-2025-45663 published?: CVE-2025-45663 was published on 2025-11-03 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:netsurf-browser:netsurf:3.11:*:*:*:*:*:*:*

More vulnerabilities in Netsurf-browser Netsurf

CVE-2025-29699 — Medium (CVSS 6.5): NetSurf 3.11 is vulnerable to Use After Free in dom_node_set_text_content function.
CVE-2024-51317 — Medium (CVSS 6.5): An issue in NetSurf v.3.11 allows a remote attacker to execute arbitrary code via the dom_node_normalize function
CVE-2012-0844 — Medium (CVSS 5.5): Information-disclosure vulnerability in Netsurf through 2.8 due to a world-readable cookie jar.

All CVEs affecting Netsurf-browser Netsurf →

Other CWE-244 vulnerabilities

CVE-2026-20039 — High (CVSS 8.6): A vulnerability in the VPN web server of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco…
CVE-2025-26305 — High (CVSS 8.2): A memory leak has been identified in the parseSWF_SOUNDINFO function in util/parser.c of libming v0.4.8, which allows…
CVE-2025-26304 — High (CVSS 8.2): A memory leak has been identified in the parseSWF_EXPORTASSETS function in util/parser.c of libming v0.4.8.
CVE-2025-70873 — High (CVSS 7.5): An information disclosure issue in the zipfileInflate function in the zipfile extension in SQLite v3.51.1 and earlier…
CVE-2025-36118 — High (CVSS 7.5): IBM Storage Virtualize 8.4, 8.5, 8.7, and 9.1 IKEv1 implementation allows remote attackers to obtain sensitive…
CVE-2025-5105 — High (CVSS 7.3): A vulnerability was found in TOZED ZLT W51 up to 1.4.2 and classified as critical. Affected by this issue is some…

Browse all CWE-244 vulnerabilities →