SB2026033007 - Multiple vulnerabilities in Microsoft Edge
Published: March 30, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 7 secuirty vulnerabilities.
1) Use-after-free (CVE-ID: CVE-2026-4680)
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a use-after-free error within the FedCM component in Google Chrome. A remote attacker can create a specially crafted web page, trick the victim into visiting it, trigger use-after-free error and execute arbitrary code on the target system.
Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.
2) Out-of-bounds read (CVE-ID: CVE-2026-4677)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition within the WebAudio component in Google Chrome. A remote attacker can trick the victim into visiting a specially crafted web page, trigger an out-of-bounds read error and gain access to sensitive information.
3) Heap-based buffer overflow (CVE-ID: CVE-2026-4673)
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a boundary error when processing untrusted HTML content in WebAudio. A remote attacker can create a specially crafted web page, trick the victim into opening it, trigger a heap-based buffer overflow and execute arbitrary code on the target system.
4) Heap-based buffer overflow (CVE-ID: CVE-2026-4675)
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a boundary error when processing untrusted HTML content in WebGL. A remote attacker can create a specially crafted web page, trick the victim into opening it, trigger a heap-based buffer overflow and execute arbitrary code on the target system.
5) Protection mechanism failure (CVE-ID: CVE-2026-32187)
The vulnerability allows a remote attacker to bypass implemented security restrictions.
The vulnerability exists due to insufficient implementation of security measures. A remote attacker can bypass implemented security restrictions.
6) Out-of-bounds read (CVE-ID: CVE-2026-4674)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition within the CSS component in Google Chrome. A remote attacker can trick the victim into visiting a specially crafted web page, trigger an out-of-bounds read error and gain access to sensitive information.
7) Integer overflow (CVE-ID: CVE-2026-4679)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to integer overflow in Fonts component in Google Chrome. A remote attacker can trick the victim to open a specially crafted web page, trigger an integer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Remediation
Install update from vendor's website.
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-4680
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-4677
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-4673
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-4675
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32187
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-4674
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-4679