CVE-2025-10537

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.33% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 25.1% of scored records. A rank, not a probability.

NVD base score

8.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2025-09-16 12:26Z11 MO AGO

Last updated

2026-04-13 14:28Z4 MO AGO

Reserved

2025-09-16

Assigning CNA

mozilla

Record state

PUBLISHED

Severity

High (CVSS 8.8)

CNA CVSS vector

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

Weaknesses

• CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferClass

Data version

5.2

Document digest

e63d4a3ce8d4eec7bce280677ee7a324fb0f6cc9fd0d39cbe7f455d4b2e2abca

• bugzilla.mozilla.orgMemory safety bugs fixed in Firefox ESR 140.3, Thunderbird ESR 140.3, Firefox 143 and Thunderbird 143https://bugzilla.mozilla.org/buglist.cgi?bug_id=1938220%2C1980730%2C1981280%2C1981283%2C1984505%2C1985067
• www.mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2025-73/
• www.mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2025-75/
• www.mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2025-77/
• www.mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2025-78/
• lists.debian.orghttps://lists.debian.org/debian-lts-announce/2025/09/msg00026.html
• lists.debian.orghttps://lists.debian.org/debian-lts-announce/2025/09/msg00020.html