Microsoft Windows flaw added to the list of vulnerabilities attackers are using
On 13 October 2026, CISA added a flaw in Microsoft Windows (CVE-2026-96951) to its Known Exploited Vulnerabilities Catalog. A flaw is listed there only when attackers are already using it.
Released by CISA Known Exploited Vulnerabilities Catalog. We read it on .
What does the source say?
Microsoft Windows Shell contains a command injection vulnerability that allows an unauthorized attacker to bypass a security feature over a network.
What does it mean for a small firm?
Windows runs on most office computers and many small firm servers. When a flaw is on this list, attackers are already using it in real attacks, not only in a laboratory. A computer that has not installed the update is open to a working attack.
The agency gave US federal agencies until 16 October 2026 to apply the fix.
What should I check?
- Open Windows Update on every computer and server the firm runs, and install every update waiting.
- Check the maker's own security notice for the flaw and confirm each machine is on a fixed version.
- Turn on automatic updates so the next fix is installed without waiting for someone to remember.
Some of this can be seen from outside a firm, from its public side. Some cannot, such as the inside of a device or an account. What we cover lists both. What we cover
Where does this come from?
- CISA Known Exploited Vulnerabilities CatalogReleased 13 October 2026, read 15 October 2026
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