CVE-2026-58616— Copilot Chat (Microsoft Edge) Information Disclosure Vulnerability
Quick assessment
Affected
Microsoft Microsoft Edge (Chromium-based)
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.
Microsoft Edge是美国Microsoft公司的一款Windows10附带的Web浏览器。 Microsoft Edge 152.0.4191.53之前版本存在竞争条件问题漏洞，该漏洞源于Copilot Chat组件中共享资源并发执行时同步不当（即竞争条件），可能导致已授权攻击者通过网络披露信息。
Possible ATT&CK Techniques 2 AI
T1005 · Data from Local System T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 6
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Microsoft | Microsoft Edge (Chromium-based) | - |
affected |
| Microsoft | Microsoft Edge for Android | 1.0.0.0< 152.0.4191.52 |
affected |
| Microsoft | Microsoft Edge for iOS | 1.0.0.0< 152.0.4191.52 |
affected |
| Microsoft | Microsoft Edge for Linux | 1.0.0< 152.0.4191.52 |
affected |
| Microsoft | Microsoft Edge for MAC | 1.0.0.0< 152.0.4191.52 |
affected |
| Microsoft | Microsoft Edge for Windows | 1.0.0.0< 152.0.4191.52 |
affected |
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I. Basic Information for CVE-2026-58616
Vulnerability Information
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Vulnerability Title
Copilot Chat (Microsoft Edge) Information Disclosure Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Concurrent execution using shared resource with improper synchronization ('race condition') in Copilot Chat (Microsoft Edge) allows an authorized attacker to disclose information over a network.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用共享资源的并发执行不恰当同步问题(竞争条件)
Source: CVE Program / CVE List V5
Vulnerability Title
Microsoft Edge 竞争条件问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft Edge是美国Microsoft公司的一款Windows10附带的Web浏览器。 Microsoft Edge 152.0.4191.53之前版本存在竞争条件问题漏洞，该漏洞源于Copilot Chat组件中共享资源并发执行时同步不当（即竞争条件），可能导致已授权攻击者通过网络披露信息。
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 |
|---|---|---|---|---|
| Microsoft | Microsoft Edge (Chromium-based) | - | - |
|
| Microsoft | Microsoft Edge for Android | 1.0.0.0 ~ 152.0.4191.52 | - |
|
| Microsoft | Microsoft Edge for iOS | 1.0.0.0 ~ 152.0.4191.52 | - |
|
| Microsoft | Microsoft Edge for Linux | 1.0.0 ~ 152.0.4191.52 | - |
|
| Microsoft | Microsoft Edge for MAC | 1.0.0.0 ~ 152.0.4191.52 | - |
|
| Microsoft | Microsoft Edge for Windows | 1.0.0.0 ~ 152.0.4191.52 | - |
|
II. Public POCs for CVE-2026-58616
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-58616 (1)
Same Patch Batch · Microsoft · 2026-08-28 · 8 CVEs total
| CVE-2026-72984 | 8.8 HIGH | Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability |
| CVE-2026-66324 | 6.5 MEDIUM | Microsoft Edge (Chromium-based) Spoofing Vulnerability |
| CVE-2026-70309 | 5.4 MEDIUM | Microsoft Edge (Chromium-based) Security Feature Bypass Vulnerability |
| CVE-2026-66323 | 5.4 MEDIUM | Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability |
| CVE-2026-62904 | 5.4 MEDIUM | Microsoft Edge (Chromium-based) Information Disclosure Vulnerability |
| CVE-2026-70331 | 5.4 MEDIUM | Microsoft Edge for iOS Spoofing Vulnerability |
| CVE-2026-66798 | 4.3 MEDIUM | Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability |
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V. Comments for CVE-2026-58616
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