Should you update to Microsoft Edge 155.0.4283.60?
No: install Microsoft Edge 156.0.4314.58 instead. Microsoft Edge 155.0.4283.60 is a security update Microsoft released on 15 Oct 2026 for Mac and Windows. It fixes 19 security flaws, 4 rated critical and 13 important by Microsoft.[1] None of them is known to be used in attacks.
It has since been replaced by Microsoft Edge 152.0.4191.137, released 16 Oct 2026, which includes all of its fixes.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 155.0.4283.60, so there’s no reason to stop at this one. Software Update offers the newest version your device can run.
Is Microsoft Edge 155.0.4283.60 still safe?
Not any more. The 6 updates since, up to Microsoft Edge 156.0.4314.58, fix 440 security flaws that Microsoft Edge 155.0.4283.60 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 19 security flaws, 4 rated critical and 13 important by Microsoft.[1] The 17 critical and important ones are:
| Flaw | Severity | What Microsoft calls it |
|---|---|---|
CVE-2026-110149 | Critical | Chromium CVE-2026-110149: Use after free |
CVE-2026-110151 | Critical | Chromium CVE-2026-110151: Use after free |
CVE-2026-110152 | Critical | Chromium CVE-2026-110152: Buffer overflow |
CVE-2026-110165 | Critical | Chromium CVE-2026-110165: Use after free |
CVE-2026-110137 | Important | Chromium CVE-2026-110137: Use after free |
CVE-2026-110138 | Important | Chromium CVE-2026-110138: Use after free |
CVE-2026-110143 | Important | Chromium CVE-2026-110143: Use of uninitialized variable |
CVE-2026-110144 | Important | Chromium CVE-2026-110144: Incorrect authorization |
CVE-2026-110145 | Important | Chromium CVE-2026-110145: Use after free |
CVE-2026-110146 | Important | Chromium CVE-2026-110146: Information leak |
CVE-2026-110150 | Important | Chromium CVE-2026-110150: Privilege elevation |
CVE-2026-110154 | Important | Chromium CVE-2026-110154: Use after free |
CVE-2026-110159 | Important | Chromium CVE-2026-110159: Incorrect authorization |
CVE-2026-110166 | Important | Chromium CVE-2026-110166: Buffer overflow |
CVE-2026-110168 | Important | Chromium CVE-2026-110168: Use after free |
CVE-2026-110169 | Important | Chromium CVE-2026-110169: Use after free |
CVE-2026-110172 | Important | Chromium CVE-2026-110172: Use after free |
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 152.0.4191.137 or later.
155.0.4283.48 vs 155.0.4283.60
Microsoft Edge 155.0.4283.48, released 12 Oct 2026, fixed 34 security flaws. Microsoft Edge 155.0.4283.60 fixes 19 security flaws and includes the fixes before it, so going straight to 155.0.4283.60 gets you both.
- Before: Microsoft Edge 155.0.4283.48, 12 Oct 2026, 34 security flaws
- After: Microsoft Edge 152.0.4191.137, 16 Oct 2026, 10 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 15, 2026”, 15 Oct 2026.