Should you update to Microsoft Edge 150.0.4078.48?
No: install Microsoft Edge 156.0.4314.58 instead. Microsoft Edge 150.0.4078.48 is a security update Microsoft released on 2 Jul 2026 for Mac and Windows. It fixes 401 security flaws, 0 rated critical and 41 important by Microsoft.[1] None of them is known to be used in attacks.
It has since been replaced by Microsoft Edge 150.0.4078.50, released 2 Jul 2026, which includes all of its fixes. If you’re on an older version, install that instead.
Should you update?
No: install Microsoft Edge 156.0.4314.58 instead. Microsoft Edge 156.0.4314.58 came out on 30 Oct 2026 and includes every fix in Microsoft Edge 150.0.4078.48, so there’s no reason to stop at this one. Software Update offers the newest version your device can run.
Is Microsoft Edge 150.0.4078.48 still safe?
Not any more. The 35 updates since, up to Microsoft Edge 156.0.4314.58, fix 2,034 security flaws that Microsoft Edge 150.0.4078.48 doesn’t, and each became public the day its fix shipped. Installing it is safe: get it only from Edge’s own About page (Edge updates itself; there’s nothing to download from a website), never from a link in an email, text or pop-up.
What it fixes
Microsoft lists 401 security flaws, 0 rated critical and 41 important by Microsoft.[1] The 41 critical and important ones are:
| Flaw | Severity | What Microsoft calls it |
|---|---|---|
CVE-2026-56645 | Important | Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability |
CVE-2026-56646 | Important | Microsoft Edge (Chromium-based) Spoofing Vulnerability |
CVE-2026-57974 | Important | Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability |
CVE-2026-57975 | Important | Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability |
CVE-2026-57977 | Important | Microsoft Edge (Chromium-based) Spoofing Vulnerability |
CVE-2026-57981 | Important | Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability |
CVE-2026-57983 | Important | Microsoft Edge (Chromium-based) Security Feature Bypass Vulnerability |
CVE-2026-57984 | Important | Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability |
CVE-2026-57985 | Important | Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability |
CVE-2026-57986 | Important | Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability |
CVE-2026-57987 | Important | Microsoft Edge (Chromium-based) Spoofing Vulnerability |
CVE-2026-57988 | Important | Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability |
CVE-2026-57991 | Important | Microsoft Edge (Chromium-based) Information Disclosure Vulnerability |
CVE-2026-57992 | Important | Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability |
CVE-2026-57993 | Important | Microsoft Edge (Chromium-based) Spoofing Vulnerability |
CVE-2026-58276 | Important | Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability |
CVE-2026-58278 | Important | Microsoft Edge (Chromium-based) Spoofing Vulnerability |
CVE-2026-58281 | Important | Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability |
CVE-2026-58282 | Important | Microsoft Edge (Chromium-based) Spoofing Vulnerability |
CVE-2026-58283 | Important | Microsoft Edge (Chromium-based) Spoofing Vulnerability |
CVE-2026-58284 | Important | Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability |
CVE-2026-58285 | Important | Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability |
CVE-2026-58286 | Important | Microsoft Edge (Chromium-based) Spoofing Vulnerability |
CVE-2026-58287 | Important | Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability |
CVE-2026-58288 | Important | Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability |
CVE-2026-58289 | Important | Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability |
CVE-2026-58290 | Important | Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability |
CVE-2026-58291 | Important | Microsoft Edge (Chromium-based) Information Disclosure Vulnerability |
CVE-2026-58292 | Important | Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability |
CVE-2026-58293 | Important | Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability |
| and 11 more | ||
How to update, and how long it takes
A minute or two. Edge restarts and reopens your tabs.
- Open Edge and click the three dots (…) at the top right.Choose Help and feedback, then About Microsoft Edge.
- Let it download the update.Edge checks as soon as that page opens. When it’s done, click Restart.
To check it worked: Three dots (…) → Help and feedback → About Microsoft Edge: the version is under the name, e.g. 157.0.4341.42. It should say 150.0.4078.50 or later.
149.0.4022.105 vs 150.0.4078.48
Microsoft Edge 149.0.4022.105, released 2 Jul 2026, fixed 2 security flaws. Microsoft Edge 150.0.4078.48 fixes 401 security flaws and includes the fixes before it, so going straight to 150.0.4078.48 gets you both.
- Before: Microsoft Edge 149.0.4022.105, 2 Jul 2026, 2 security flaws
- After: Microsoft Edge 150.0.4078.50, 2 Jul 2026, 2 security flaws
- Microsoft Edge updates, every release and the latest version
- Updates, the latest version of everything HARD tracks
References
- ^ Microsoft. “Microsoft Edge security release notes, July 2, 2026”, 2 Jul 2026.