CVE-2024-26192 Overview
CVE-2024-26192 is an information disclosure vulnerability in Microsoft Edge (Chromium-based). The flaw allows a remote attacker to expose sensitive information when a victim interacts with attacker-controlled web content. Microsoft assigned the issue a CVSS 3.1 base score of 8.2, reflecting a scope-changed impact with high confidentiality consequences. The vulnerability is classified under [CWE-359] Exposure of Private Personal Information to an Unauthorized Actor. Exploitation requires user interaction, such as visiting a crafted page, but does not require authentication or elevated privileges. Microsoft released guidance through its Security Update Guide and addressed the issue in subsequent Edge channel updates.
Critical Impact
A remote attacker can disclose sensitive browser data across a security scope boundary when a user visits crafted web content, with no authentication required.
Affected Products
- Microsoft Edge (Chromium-based) — versions prior to the fixed release
- Windows builds of Microsoft Edge using the affected Chromium engine
- macOS builds of Microsoft Edge using the affected Chromium engine
Discovery Timeline
- 2024-02-23 - CVE-2024-26192 published to the National Vulnerability Database
- 2024-11-29 - Last updated in NVD database
Technical Details for CVE-2024-26192
Vulnerability Analysis
The vulnerability resides in Microsoft Edge's Chromium-based browser engine and exposes private information to unauthorized actors. The issue maps to [CWE-359], indicating the browser fails to enforce confidentiality boundaries around sensitive user data. An attacker delivers crafted web content that triggers the disclosure when rendered. Because the CVSS vector indicates a scope change, the disclosed data can cross the originating security context and reach resources beyond the vulnerable component. The user interaction requirement limits drive-by exploitation, but social engineering through phishing links, malvertising, or compromised sites is sufficient to trigger the flaw. EPSS data places exploitation probability at 0.207%, and no public proof-of-concept or in-the-wild exploitation has been reported as of this writing.
Root Cause
Microsoft has not published deep technical detail. The CWE-359 classification indicates the browser improperly exposed private or personal information to an unauthorized actor, likely through insufficient isolation between web origins or inadequate filtering of data returned to script contexts.
Attack Vector
The attack is delivered over the network. An attacker hosts malicious web content and lures a victim into loading it inside Microsoft Edge. Successful interaction returns information the attacker should not have been able to read, such as cross-origin response data or browser-internal state. No authentication is required, and the exploit complexity is low.
No verified exploit code is available in public repositories. Refer to the Microsoft Security Update Guide entry for CVE-2024-26192 for vendor-provided technical context.
Detection Methods for CVE-2024-26192
Indicators of Compromise
- Edge browser processes loading unfamiliar domains immediately followed by outbound POST requests carrying browser-state data
- Browser telemetry showing cross-origin reads or unexpected fetch and XMLHttpRequest responses returning sensitive content
- User reports of phishing or malvertising links that target Edge users specifically
Detection Strategies
- Inventory installed Microsoft Edge versions across the fleet and flag hosts running builds released before the February 2024 security update
- Correlate web proxy logs with endpoint browser process telemetry to identify navigation to newly registered or low-reputation domains
- Hunt for anomalous data exfiltration from msedge.exe to external hosts shortly after URL clicks delivered via email or chat
Monitoring Recommendations
- Enable browser management telemetry through Microsoft Edge management policies and forward events to a central SIEM
- Track Edge update channel compliance and alert when endpoints fall behind the current Stable channel
- Monitor outbound DNS and TLS Server Name Indication (SNI) for traffic to suspicious domains originating from Edge
How to Mitigate CVE-2024-26192
Immediate Actions Required
- Update Microsoft Edge to the latest Stable channel build through edge://settings/help or enterprise update tooling
- Restart all Edge instances after update to ensure the patched binaries are loaded
- Apply organization-wide policy enforcement so users cannot disable automatic Edge updates
Patch Information
Microsoft published remediation guidance and update artifacts through the Microsoft Security Update Guide for CVE-2024-26192. Administrators should deploy the corresponding Edge Stable channel release across managed endpoints. Edge auto-update will install the fix on internet-connected systems unless update policies have been restricted.
Workarounds
- Restrict browsing to trusted sites using Microsoft Defender SmartScreen and enterprise URL allow lists until patching completes
- Train users to avoid clicking unsolicited links delivered through email, messaging, or social media
- Deploy network-level filtering to block known malicious and newly registered domains
# Force Microsoft Edge update on Windows endpoints via the update service
sc query edgeupdate
sc start edgeupdate
# Verify installed Edge version after update
"%ProgramFiles(x86)%\Microsoft\Edge\Application\msedge.exe" --version
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
