Kaspersky ID:
KLA91163
Detect Date:
07/21/2026
Updated:
07/22/2026

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, obtain sensitive information.

Below is a complete list of vulnerabilities:

  1. Denial of service vulnerability in the JavaScript: WebAssembly component can be exploited remotely to cause denial of service.
  2. Security vulnerability can be exploited to bypass security restrictions.
  3. Security vulnerability in the DOM: Navigation component can be exploited to bypass security restrictions.
  4. Denial of service vulnerability in the Audio/Video: cubeb component can be exploited remotely to cause denial of service.
  5. A remote code execution vulnerability in the WebRTC: Audio/Video component can be exploited remotely to execute arbitrary code.
  6. A remote code execution vulnerability in the DOM: Navigation component can be exploited remotely to execute arbitrary code.
  7. A remote code execution vulnerability in the Disability Access APIs component can be exploited remotely to execute arbitrary code.
  8. Denial of service vulnerability in the DOM: Bindings (WebIDL) component can be exploited remotely to cause denial of service.
  9. Information disclosure vulnerability in the Graphics: ImageLib component can be exploited to obtain sensitive information.
  10. A remote code execution vulnerability in the JavaScript: WebAssembly component can be exploited remotely to execute arbitrary code.
  11. Denial of service vulnerability in the Graphics component can be exploited remotely to cause denial of service.
  12. Information disclosure vulnerability in the Framework component in DevTools can be exploited to obtain sensitive information.
  13. Security vulnerability in the PDF Viewer component can be exploited to bypass security restrictions.
  14. Security vulnerability in the DOM: Content Processes component can be exploited to bypass security restrictions.
  15. Security vulnerability in the Networking: DNS component can be exploited to bypass security restrictions.
  16. Security vulnerability in the DOM: Networking component can be exploited to bypass security restrictions.
  17. Security vulnerability in the Enterprise Policies component can be exploited to bypass security restrictions.
  18. Information disclosure vulnerability in the Storage: IndexedDB component can be exploited to obtain sensitive information.
  19. Denial of service vulnerability in the Audio/Video: GMP component can be exploited remotely to cause denial of service.
  20. Security vulnerability in WebExtensions can be exploited to bypass security restrictions.
  21. Information disclosure vulnerability in the Networking: WebSockets component can be exploited to obtain sensitive information.
  22. A remote code execution vulnerability in Firefox ESR 140 can be exploited remotely to execute arbitrary code.
  23. A remote code execution vulnerability in Firefox ESR 115 can be exploited remotely to execute arbitrary code.

Original advisories

Exploitation

CVE list

  • CVE-2026-15718
    warning
  • CVE-2026-15719
    high
  • CVE-2026-16349
    unknown
  • CVE-2026-16350
    unknown
  • CVE-2026-16351
    unknown
  • CVE-2026-16352
    unknown
  • CVE-2026-16353
    unknown
  • CVE-2026-16354
    unknown
  • CVE-2026-16355
    unknown
  • CVE-2026-16356
    unknown
  • CVE-2026-16357
    unknown
  • CVE-2026-16358
    unknown
  • CVE-2026-16359
    critical
  • CVE-2026-16360
    unknown
  • CVE-2026-16361
    critical
  • CVE-2026-16362
    unknown
  • CVE-2026-16363
    unknown
  • CVE-2026-16368
    unknown
  • CVE-2026-16369
    unknown
  • CVE-2026-16371
    unknown
  • CVE-2026-16374
    unknown
  • CVE-2026-16375
    unknown
  • CVE-2026-16377
    unknown
  • CVE-2026-16379
    unknown
  • CVE-2026-16381
    unknown
  • CVE-2026-16383
    unknown
  • CVE-2026-16387
    unknown
  • CVE-2026-16390
    unknown
  • CVE-2026-16391
    unknown
  • CVE-2026-16396
    unknown
  • CVE-2026-16405
    critical
  • CVE-2026-16412
    critical

Read more

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

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