Should you update to Microsoft Edge 151.0.4129.101?
No: install Microsoft Edge 156.0.4314.58 instead. Microsoft Edge 151.0.4129.101 is a security update Microsoft released on 20 Aug 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It has since been replaced by Microsoft Edge 151.0.4129.107, released 24 Aug 2026, which includes all of its fixes.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 151.0.4129.101, so there’s no reason to stop at this one. Software Update offers the newest version your device can run.
Is Microsoft Edge 151.0.4129.101 still safe?
Not any more. The 23 updates since, up to Microsoft Edge 156.0.4314.58, fix 1,502 security flaws that Microsoft Edge 151.0.4129.101 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-2026-76033 | Not rated | Chromium: CVE-2026-76033 Inappropriate implementation in CORS |
CVE-2026-76034 | Not rated | Chromium: CVE-2026-76034 Buffer overflow in WebGL |
CVE-2026-76035 | Not rated | Chromium: CVE-2026-76035 Inappropriate implementation in Media |
CVE-2026-76036 | Not rated | Chromium CVE-2026-76036: Buffer overflow in Dawn |
CVE-2026-76037 | Not rated | Chromium: CVE-2026-76037 Link following in CredentialProvider |
CVE-2026-76038 | Not rated | Chromium: CVE-2026-76038 Type confusion in V8 |
CVE-2026-76039 | Not rated | Chromium CVE-2026-76039: Incorrect reference resolution in Core |
CVE-2026-76040 | Not rated | Chromium: CVE-2026-76040 Use after free in Browser |
CVE-2026-76041 | Not rated | Chromium: CVE-2026-76041 Information leak in Skia |
CVE-2026-76042 | Not rated | Chromium: CVE-2026-76042 Use of uninitialized resource in GPU |
CVE-2026-76043 | Not rated | Chromium: CVE-2026-76043 Incorrect calculation in V8 |
CVE-2026-76044 | Not rated | Chromium: CVE-2026-76044 Race condition in USB |
CVE-2026-76045 | Not rated | Chromium: CVE-2026-76045 Use after free in WebGL |
CVE-2026-76047 | Not rated | Chromium: CVE-2026-76047 Type confusion in V8 |
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 151.0.4129.107 or later.
151.0.4129.86 vs 151.0.4129.101
Microsoft Edge 151.0.4129.86, released 14 Aug 2026, fixed 6 security flaws. Microsoft Edge 151.0.4129.101 fixes 14 security flaws and includes the fixes before it, so going straight to 151.0.4129.101 gets you both.
- Before: Microsoft Edge 151.0.4129.86, 14 Aug 2026, 6 security flaws
- After: Microsoft Edge 151.0.4129.107, 24 Aug 2026, 7 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, August 20, 2026”, 20 Aug 2026.