// For flags

CVE-2021-4128

 

Severity Score

6.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

1
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

When transitioning in and out of fullscreen mode, a graphics object was not correctly protected; resulting in memory corruption and a potentially exploitable crash.<br>*This bug only affects Firefox on MacOS. Other operating systems are unaffected.*. This vulnerability affects Firefox < 95.

Al entrar y salir del modo de pantalla completa, un objeto gráfico no estaba protegido correctamente; lo que resulta en daños en la memoria y un bloqueo potencialmente explotable.<br>*Este error solo afecta a Firefox en MacOS. Otros sistemas operativos no se ven afectados.*. Esta vulnerabilidad afecta a Firefox &lt; 95.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
None
Integrity
None
Availability
Complete
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2021-12-16 CVE Reserved
  • 2022-12-22 CVE Published
  • 2024-08-03 CVE Updated
  • 2024-08-03 First Exploit
  • 2025-03-30 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
CWE
  • CWE-416: Use After Free
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Mozilla
Search vendor "Mozilla"
 Firefox
Search vendor "Mozilla" for product "Firefox"
 < 95.0
Search vendor "Mozilla" for product "Firefox" and version " < 95.0"
-
Affected
in Apple
Search vendor "Apple"
 Macos
Search vendor "Apple" for product "Macos"
--
Safe