#VU107397 Out-of-bounds read in Microsoft Edge - CVE-2025-29834

Vulnerability identifier: #VU107397

Vulnerability risk: High

CVSSv4.0: 4.8 [CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2025-29834

CWE-ID: CWE-125

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Microsoft Edge
Client/Desktop applications / Web browsers

Vendor: Microsoft

Description

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to a boundary condition when handling HTML content. A remote attacker can trick the victim into visiting a specially crafted website, trigger an out-of-bounds read error and execute arbitrary code on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Microsoft Edge: 100.0.1185.29 - 135.0.3179.66

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External links
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-29834

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.