Descubren dos vulnerabilidades críticas que afectan a Active Directory
ResetNightmare y KerberLoss, ya parechadas por Microsoft, permiten manipular la forma en la que el sistema de identidad reconoce a usuarios y servicios.
ResetNightmare y KerberLoss, ya parechadas por Microsoft, permiten manipular la forma en la que el sistema de identidad reconoce a usuarios y servicios.
En contexto
- Tema: Ciberseguridad — Riesgo, identidad, respuesta a incidentes y cumplimiento.
- Fuente: Silicon España
- Publicado: 28/08/2026
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Why it matters
In security the story is rarely the attack. It is the time between the intrusion and somebody noticing. That number says more about an organisation than any certificate hanging on the reception wall.
I read it with the same short list as always: second factor on anything that grants access, tested backups kept off the network, and a real inventory of what is exposed to the internet. It is not glamorous, and it still prevents most disasters.
What usually goes wrong
Where it usually breaks is response, not prevention. There are tools, there are alerts, and when something real happens nobody knows who decides to disconnect, who gets called first, or what the customer is told. Valuable hours get lost arguing about that while the problem grows.
What to watch
- How long it took to detect, usually the most revealing metric in the whole case.
- Whether initial access came from a legitimate account handled badly, which is the most frequent pattern.
- What could be restored and how fast — a backup that was never tested does not count.
How I read this entry
I would use it for a conversation with the board, not with the technical team. The question you must be able to answer there is how long the business can operate without its systems and what each day of that outage costs. With that number, the security budget gets discussed differently.
The original story is published in another language; the excerpt is quoted as the publisher delivers it and the commentary is written in English.
Living through this in your own team?
Open the chat and tell me how you're handling it. I'm interested in comparing notes.
