Microsoft Office exploited weakness fixed by defense-in-depth update

exploited in the wild · published 2023-08-08

Attackers are actively exploiting a weakness in Office that this hardening update protects against. Without it, crafted Office content can be used against an unpatched machine.

Fixed in: 15.0.5579.1001, 16.0.5408.1001, 16.0.5408.1002

Source: api.msrc.microsoft.com

Am I affected?

You are affected if the installed version is older than the fixed version of its release line: 15.0.5579.1001, 16.0.5408.1001, 16.0.5408.1002. Check the version you have and update to the fixed version of your line or later. The fixed versions are 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 1495 and your operating system.