Edge integer overflow fixed in 154.0.4258.62

high severity · published 2026-10-29

An integer overflow or wraparound flaw in Microsoft Edge (Chromium-based) allows an unauthorized attacker to elevate privileges over a network. Updating Edge to 154.0.4258.62 or later fixes it.

Fixed in: 154.0.4258.62

CVE: CVE-2026-88077

Source: NVD

Am I affected?

You are affected if the installed version is older than 154.0.4258.62. Check the version you have and update to 154.0.4258.62 or later. The fixed version is verified against a vendor or advisory source.

Get the fix

FixLane has a reviewed fix procedure for this incident: a read-only check first, then the fix. Ask the Telegram bot, or connect an AI agent to the FixLane MCP server and call get_fix_prompt with incident id 627 and your operating system.