Should you update to Microsoft Edge 153.0.4234.48?
No: install Microsoft Edge 156.0.4314.58 instead. Microsoft Edge 153.0.4234.48 is a security update Microsoft released on 18 Sep 2026 for Mac and Windows. It fixes 14 security flaws.[1] None of them is known to be used in attacks.
It has since been replaced by Microsoft Edge 153.0.4234.49, released 21 Sep 2026, which includes all of its fixes.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 153.0.4234.48, so there’s no reason to stop at this one. Software Update offers the newest version your device can run.
Is Microsoft Edge 153.0.4234.48 still safe?
Not any more. The 14 updates since, up to Microsoft Edge 156.0.4314.58, fix 866 security flaws that Microsoft Edge 153.0.4234.48 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 14 security flaws.[1] Microsoft doesn’t rate them by severity. They are:
| Flaw | Severity | What Microsoft calls it |
|---|---|---|
CVE-2026-93373 | Not rated | Chromium CVE-2026-93373: Use after free in Extensions |
CVE-2026-93374 | Not rated | Chromium CVE-2026-93374: Use after free in Dawn |
CVE-2026-93375 | Not rated | Chromium CVE-2026-93375: Incorrect reference resolution in Tracing |
CVE-2026-93376 | Not rated | Chromium CVE-2026-93376: Out of bounds read in DataTransfer |
CVE-2026-93377 | Not rated | Chromium CVE-2026-93377: Type confusion in V8 |
CVE-2026-93378 | Not rated | Chromium CVE-2026-93378: Missing authorization in Storage |
CVE-2026-93379 | Not rated | Chromium CVE-2026-93379: Incorrect authorization in ORB |
CVE-2026-93380 | Not rated | Chromium CVE-2026-93380: Race condition in FileSystem |
CVE-2026-93381 | Not rated | Chromium CVE-2026-93381: Buffer overflow in PDFium |
CVE-2026-93382 | Not rated | Chromium CVE-2026-93382: Use after free in PDFium |
CVE-2026-93383 | Not rated | Chromium CVE-2026-93383: Information leak in Permissions |
CVE-2026-93385 | Not rated | Chromium CVE-2026-93385: Information leak in Paint |
CVE-2026-93386 | Not rated | Chromium CVE-2026-93386: UI misrepresentation in WebAppInstalls |
CVE-2026-93387 | Not rated | Chromium CVE-2026-93387: Improper state validation in Skia |
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 153.0.4234.49 or later.
153.0.4234.46 vs 153.0.4234.48
Microsoft Edge 153.0.4234.46, released 17 Sep 2026, fixed 44 security flaws. Microsoft Edge 153.0.4234.48 fixes 14 security flaws and includes the fixes before it, so going straight to 153.0.4234.48 gets you both.
- Before: Microsoft Edge 153.0.4234.46, 17 Sep 2026, 44 security flaws
- After: Microsoft Edge 153.0.4234.49, 21 Sep 2026, 1 security flaw
- 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 18, 2026”, 18 Sep 2026.