Kaspersky ID:
KLA91250
Detect Date:
09/01/2026
Updated:
09/02/2026

Description

Multiple vulnerabilities were found in Mozilla Firefox ESR. Malicious users can exploit these vulnerabilities to bypass security restrictions, cause denial of service, execute arbitrary code.

Below is a complete list of vulnerabilities:

  1. Security vulnerability in the Remote Settings Client component can be exploited to bypass security restrictions.
  2. Security vulnerability in the DOM: Workers component can be exploited to bypass security restrictions.
  3. A remote code execution vulnerability in the DOM: Navigation component can be exploited remotely to execute arbitrary code.
  4. A remote code execution vulnerability in the Audio/Video component can be exploited remotely to execute arbitrary code.
  5. A remote code execution vulnerability in the DOM: Security component can be exploited remotely to execute arbitrary code.
  6. A remote code execution vulnerability in the DOM: Core & HTML component can be exploited remotely to execute arbitrary code.
  7. Security vulnerability in the DOM: Navigation component can be exploited to bypass security restrictions.
  8. Denial of service vulnerability in the Graphics component can be exploited remotely to cause denial of service.
  9. Security vulnerability can be exploited to bypass security restrictions.

Original advisories

Exploitation

Related products

CVE list

  • CVE-2026-16365
    critical
  • CVE-2026-16371
    critical
  • CVE-2026-75874
    critical
  • CVE-2026-84119
    critical
  • CVE-2026-84120
    high
  • CVE-2026-84121
    critical
  • CVE-2026-84122
    high
  • CVE-2026-84124
    high
  • CVE-2026-84131
    critical
  • CVE-2026-84143
    unknown
  • CVE-2026-84145
    critical

Read more

Find out the statistics of the vulnerabilities spreading in your region on statistics.securelist.com

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