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CVE-2025-14333— Memory safety bugs fixed in Firefox ESR 140.6, Thunderbird ESR 140.6, Firefox 146 and Thunderbird 146

Quick assessment

Affected
Mozilla Firefox
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Mozilla Firefox是美国Mozilla基金会的一款开源Web浏览器。 Mozilla Firefox 146之前版本和ESR 140.6之前版本存在安全漏洞，该漏洞源于内存安全问题，可能导致内存损坏和执行任意代码。

AI Predicted 8.8 Difficulty: Hard EPSS 0.43% · P36
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I. Basic Information for CVE-2025-14333

Vulnerability Information
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Vulnerability Title
Memory safety bugs fixed in Firefox ESR 140.6, Thunderbird ESR 140.6, Firefox 146 and Thunderbird 146
Source: CVE Program / CVE List V5
Vulnerability Description
Memory safety bugs present in Firefox ESR 140.5, Thunderbird ESR 140.5, Firefox 145 and Thunderbird 145. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 146, Firefox ESR 140.6, Thunderbird 146, and Thunderbird 140.6.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Mozilla Firefox 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mozilla Firefox是美国Mozilla基金会的一款开源Web浏览器。 Mozilla Firefox 146之前版本和ESR 140.6之前版本存在安全漏洞，该漏洞源于内存安全问题，可能导致内存损坏和执行任意代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Mozilla Firefox 140.6 ~ 140.* -
Mozilla Thunderbird 140.6 ~ 140.* -

II. Public POCs for CVE-2025-14333

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III. Intelligence Information for CVE-2025-14333

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Vendor Advisories for CVE-2025-14333 (4)

Same Patch Batch · Mozilla · 2025-12-09 · 13 CVEs total

CVE-2025-14321 Use-after-free in the WebRTC: Signaling component
CVE-2025-14322 Sandbox escape due to incorrect boundary conditions in the Graphics: CanvasWebGL component
CVE-2025-14323 Privilege escalation in the DOM: Notifications component
CVE-2025-14324 JIT miscompilation in the JavaScript Engine: JIT component
CVE-2025-14325 JIT miscompilation in the JavaScript Engine: JIT component
CVE-2025-14326 Use-after-free in the Audio/Video: GMP component
CVE-2025-14327 Spoofing issue in the Downloads Panel component
CVE-2025-14328 Privilege escalation in the Netmonitor component
CVE-2025-14329 Privilege escalation in the Netmonitor component
CVE-2025-14330 JIT miscompilation in the JavaScript Engine: JIT component
CVE-2025-14331 Same-origin policy bypass in the Request Handling component
CVE-2025-14332 Memory safety bugs fixed in Firefox 146 and Thunderbird 146

IV. Related Vulnerabilities

Same product: Firefox
Same vendor: Mozilla

V. Comments for CVE-2025-14333

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