CVE-2025-10533

Name: CVE-2025-10533
Creator: NVD / NIST
Published: 2025-09-16T13:15:47.553+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 0.69%

Last modified Jun 17, 2026

CVE-2025-10533 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. Integer overflow in the SVG component. This vulnerability was fixed in Firefox 143, Firefox ESR 115.28, Firefox ESR 140.3, Thunderbird 143, and Thunderbird 140.3.. EPSS estimates a 0.69% chance of exploitation in the next 30 days.

Description

Integer overflow in the SVG component. This vulnerability was fixed in Firefox 143, Firefox ESR 115.28, Firefox ESR 140.3, Thunderbird 143, and Thunderbird 140.3.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

0.69%

48.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-190

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 115.28.0
Mozilla	Firefox	< 143.0
Mozilla	Firefox	>= 116.0, < 140.3
Mozilla	Thunderbird	< 140.3.0
Mozilla	Thunderbird	>= 141.0, < 143.0

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1980788Permissions Required
https://www.mozilla.org/security/advisories/mfsa2025-73/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-74/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-75/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-77/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-78/Vendor Advisory
https://lists.debian.org/debian-lts-announce/2025/09/msg00026.html

Timeline

Published: Sep 16, 2025
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2025-10533?

Integer overflow in the SVG component. This vulnerability was fixed in Firefox 143, Firefox ESR 115.28, Firefox ESR 140.3, Thunderbird 143, and Thunderbird 140.3.

How severe is CVE-2025-10533?

CVE-2025-10533 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.69% probability of exploitation in the next 30 days.

How do I fix CVE-2025-10533?

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-2025-10533?

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

Scan your code now

Source: NVD / NIST