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CVE-2025-10537— Memory safety bugs fixed in Firefox ESR 140.3, Thunderbird ESR 140.3, Firefox 143 and Thunderbird 143

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和Mozilla Thunderbird都是美国Mozilla基金会的产品。Mozilla Firefox是一款开源Web浏览器。Mozilla Thunderbird是一套从Mozilla Application Suite独立出来的电子邮件客户端软件。该软件支持IMAP、POP邮件协议以及HTML邮件格式。 Mozilla Firefox和Mozilla Thunderbird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。以下产品及版本受到影响：F

AI Predicted 8.8 Difficulty: Moderate EPSS 0.33% · P25

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2025-10537

Vulnerability Information
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Vulnerability Title
Memory safety bugs fixed in Firefox ESR 140.3, Thunderbird ESR 140.3, Firefox 143 and Thunderbird 143
Source: CVE Program / CVE List V5
Vulnerability Description
Memory safety bugs present in Firefox ESR 140.2, Thunderbird ESR 140.2, Firefox 142 and Thunderbird 142. 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 143, Firefox ESR 140.3, Thunderbird 143, and Thunderbird 140.3.
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和Mozilla Thunderbird 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mozilla Firefox和Mozilla Thunderbird都是美国Mozilla基金会的产品。Mozilla Firefox是一款开源Web浏览器。Mozilla Thunderbird是一套从Mozilla Application Suite独立出来的电子邮件客户端软件。该软件支持IMAP、POP邮件协议以及HTML邮件格式。 Mozilla Firefox和Mozilla Thunderbird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。以下产品及版本受到影响：F
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 140.3 ~ 140.* -
Mozilla Thunderbird 140.3 ~ 140.* -

II. Public POCs for CVE-2025-10537

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III. Intelligence Information for CVE-2025-10537

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Vendor Advisories for CVE-2025-10537 (4)

Same Patch Batch · Mozilla · 2025-09-16 · 12 CVEs total

CVE-2025-10528 Sandbox escape due to undefined behavior, invalid pointer in the Graphics: Canvas2D compon
CVE-2025-10533 Integer overflow in the SVG component
CVE-2025-10527 Sandbox escape due to use-after-free in the Graphics: Canvas2D component
CVE-2025-10532 Incorrect boundary conditions in the JavaScript: GC component
CVE-2025-10529 Same-origin policy bypass in the Layout component
CVE-2025-10536 Information disclosure in the Networking: Cache component
CVE-2025-10530 Spoofing issue in the WebAuthn component in Firefox for Android
CVE-2025-10531 Mitigation bypass in the Web Compatibility: Tooling component
CVE-2025-10535 Information disclosure, mitigation bypass in the Privacy component in Firefox for Android
CVE-2025-10534 Spoofing issue in the Site Permissions component
CVE-2025-10290 Opening links via the contextual menu in Focus for iOS would not update the toolbar UI cor

IV. Related Vulnerabilities

Same product: Firefox
Same vendor: Mozilla

V. Comments for CVE-2025-10537

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