Should you update to Microsoft Edge 153.0.4234.46?
No: install Microsoft Edge 156.0.4314.58 instead. Microsoft Edge 153.0.4234.46 is a security update Microsoft released on 17 Sep 2026 for Mac and Windows. It fixes 44 security flaws, 3 rated critical and 30 important by Microsoft.[1] None of them is known to be used in attacks.
It has since been replaced by Microsoft Edge 153.0.4234.48, released 18 Sep 2026, which includes all of its fixes.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 153.0.4234.46, so there’s no reason to stop at this one. Software Update offers the newest version your device can run.
Is Microsoft Edge 153.0.4234.46 still safe?
Not any more. The 15 updates since, up to Microsoft Edge 156.0.4314.58, fix 880 security flaws that Microsoft Edge 153.0.4234.46 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 44 security flaws, 3 rated critical and 30 important by Microsoft.[1] The 33 critical and important ones are:
| Flaw | Severity | What Microsoft calls it |
|---|---|---|
CVE-2026-91721 | Critical | Chromium CVE-2026-91721: Use after free |
CVE-2026-91726 | Critical | Chromium CVE-2026-91726: Out of bounds read |
CVE-2026-91749 | Critical | Chromium CVE-2026-91749: Use after free |
CVE-2026-88094 | Important | Azure Storage Library Elevation of Privilege Vulnerability |
CVE-2026-88097 | Important | Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability |
CVE-2026-91708 | Important | Chromium CVE-2026-91708: Race condition |
CVE-2026-91709 | Important | Chromium CVE-2026-91709: Type confusion |
CVE-2026-91710 | Important | Chromium CVE-2026-91710: Use after free |
CVE-2026-91711 | Important | Chromium CVE-2026-91711: Out of bounds write |
CVE-2026-91712 | Important | Chromium CVE-2026-91712: Race condition |
CVE-2026-91715 | Important | Chromium CVE-2026-91715: Type confusion |
CVE-2026-91716 | Important | Chromium CVE-2026-91716: Use after free |
CVE-2026-91717 | Important | Chromium CVE-2026-91717: Missing authorization |
CVE-2026-91718 | Important | Chromium CVE-2026-91718: Use after free |
CVE-2026-91720 | Important | Chromium CVE-2026-91720: Uninitialized resource |
CVE-2026-91724 | Important | Chromium CVE-2026-91724: Use after free |
CVE-2026-91727 | Important | Chromium CVE-2026-91727: Incorrect reference resolution |
CVE-2026-91728 | Important | Chromium CVE-2026-91728: Integer overflow |
CVE-2026-91729 | Important | Chromium CVE-2026-91729: Use after free |
CVE-2026-91731 | Important | Chromium CVE-2026-91731: Type confusion |
CVE-2026-91733 | Important | Chromium CVE-2026-91733: Improper state validation |
CVE-2026-91734 | Important | Chromium CVE-2026-91734: Incorrect authorization |
CVE-2026-91735 | Important | Chromium CVE-2026-91735: Incorrect authorization |
CVE-2026-91736 | Important | Chromium CVE-2026-91736: Use after free |
CVE-2026-91737 | Important | Chromium CVE-2026-91737: Use after free |
CVE-2026-91740 | Important | Chromium CVE-2026-91740: Uninitialized resource |
CVE-2026-91741 | Important | Chromium CVE-2026-91741: Type confusion |
CVE-2026-91743 | Important | Chromium CVE-2026-91743: Race condition |
CVE-2026-91744 | Important | Chromium CVE-2026-91744: Race condition |
CVE-2026-91745 | Important | Chromium CVE-2026-91745: Use after free |
| and 3 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 153.0.4234.48 or later.
153.0.4234.32 vs 153.0.4234.46
Microsoft Edge 153.0.4234.32, released 10 Sep 2026, fixed 231 security flaws. Microsoft Edge 153.0.4234.46 fixes 44 security flaws and includes the fixes before it, so going straight to 153.0.4234.46 gets you both.
- Before: Microsoft Edge 153.0.4234.32, 10 Sep 2026, 231 security flaws
- After: Microsoft Edge 153.0.4234.48, 18 Sep 2026, 14 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, September 17, 2026”, 17 Sep 2026.