Should you update to Microsoft Edge 154.0.4258.62?
No: install Microsoft Edge 156.0.4314.58 instead. Microsoft Edge 154.0.4258.62 is a security update Microsoft released on 5 Oct 2026 for Mac and Windows. It fixes 13 security flaws, 0 rated critical and 3 important by Microsoft.[1] One of them is already being used in attacks.
It has since been replaced by Microsoft Edge 155.0.4283.45, released 8 Oct 2026, which includes all of its fixes.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 154.0.4258.62, so there’s no reason to stop at this one. Software Update offers the newest version your device can run.
Is Microsoft Edge 154.0.4258.62 still safe?
Not any more. The 9 updates since, up to Microsoft Edge 156.0.4314.58, fix 705 security flaws that Microsoft Edge 154.0.4258.62 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 13 security flaws, 0 rated critical and 3 important by Microsoft.[1] The 3 critical and important ones are:
| Flaw | Severity | What Microsoft calls it |
|---|---|---|
CVE-2026-88077 | Important | Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability |
CVE-2026-96951 | Important | Windows Shell Security Feature Bypass Vulnerability |
CVE-2026-103624 | Important | Chromium CVE-2026-103624: Use after free |
Used in attacks
This fix closes a flaw that attackers were already using before the update came out, either on CISA’s list of flaws being used in attacks or in Microsoft’s own words.[2]
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 155.0.4283.45 or later.
154.0.4258.53 vs 154.0.4258.62
Microsoft Edge 154.0.4258.53, released 1 Oct 2026, fixed 31 security flaws. Microsoft Edge 154.0.4258.62 fixes 13 security flaws and includes the fixes before it, so going straight to 154.0.4258.62 gets you both.
- Before: Microsoft Edge 154.0.4258.53, 1 Oct 2026, 31 security flaws
- After: Microsoft Edge 155.0.4283.45, 8 Oct 2026, 212 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, October 05, 2026”, 5 Oct 2026.
- ^ Cybersecurity and Infrastructure Security Agency. “Known Exploited Vulnerabilities Catalog”.