SB2026072537 - Multiple vulnerabilities in Microsoft Edge
Published: July 25, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 7 vulnerabilities.
1) Out-of-bounds write (CVE-ID: CVE-2026-16807)
CWE-ID: CWE-787 - Out-of-bounds write
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a boundary error when processing untrusted HTML content in Codecs. A remote attacker can create a specially crafted web page, trick the victim into opening it, trigger out-of-bounds write and execute arbitrary code on the target system.
2) Use-after-free (CVE-ID: CVE-2026-16806)
CWE-ID: CWE-416 - Use After Free
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a use-after-free error within the WebMCP 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.
3) Use-after-free (CVE-ID: CVE-2026-16805)
CWE-ID: CWE-416 - Use After Free
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a use-after-free error within the Blink 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.
4) Use-after-free (CVE-ID: CVE-2026-16804)
CWE-ID: CWE-416 - Use After Free
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a use-after-free error within the Input 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.
5) Origin validation error (CVE-ID: CVE-2026-57978)
CWE-ID: CWE-346 - Origin Validation Error
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to perform spoofing.
The vulnerability exists due to origin validation error in Microsoft Edge (Chromium-based) when processing attacker-controlled web content. A remote attacker can host a specially crafted website and convince a user to view it to perform spoofing.
User interaction is required to visit the attacker-controlled webpage and perform two tap gestures that cause autofill to activate.
6) Files or Directories Accessible to External Parties (CVE-ID: CVE-2026-57990)
CWE-ID: CWE-552 - Files or Directories Accessible to External Parties
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to files or directories accessible to external parties in Microsoft Edge (Chromium-based) when rendering attacker-controlled web content. A remote attacker can host a specially crafted website and convince a user to visit it to disclose sensitive information.
User interaction is required, and the user must visit the attacker-controlled webpage and perform two tap gestures that cause autofill to activate. Successful exploitation can affect resources beyond the security scope of the vulnerable component.
7) Origin validation error (CVE-ID: CVE-2026-57989)
CWE-ID: CWE-346 - Origin Validation Error
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to origin validation error in Microsoft Edge (Chromium-based) when rendering an attacker-controlled webpage. A remote attacker can host a specially crafted website and convince a user to visit it to disclose sensitive information.
User interaction is required, and the user must visit the attacker-controlled webpage and perform two tap gestures that cause autofill to activate.
Remediation
Install update from vendor's website.
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-16807
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-16806
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-16805
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-16804
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2026-57978
- https://docs.microsoft.com/en-us/DeployEdge/microsoft-edge-relnotes-security
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2026-57990
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2026-57989