This Monday, December 22, 2025, a DDoS cyberattack severely disrupted the services of La Poste and La Banque Postale, as well as other banking institutions. Just days before Christmas, many customers find themselves without access to their usual services. A look back at the events and consequences of this large-scale cyberattack.
The 3 key points not to miss
- A DDoS attack paralyzed La Poste and La Banque Postale, making their services inaccessible.
- The banks Caisse d’Épargne and Banque Populaire also experienced similar disruptions.
- Payments are not affected, as they use a network separate from the attacked data center.
Impact on La Poste and La Banque Postale
Since this morning, La Banque Postale and most of La Poste’s services have been out of service due to a distributed denial-of-service (DDoS) attack. This type of cyberattack involves overwhelming a network or website with requests to make it inoperative. In this case, the interconnection between La Poste’s data center and the internet network is the main target, leading to the paralysis of many services such as Colissimo, Digiposte, and parcel postage.
Disruption of banking services
In addition to La Banque Postale, two other major French institutions, Caisse d’Épargne and Banque Populaire, also encountered malfunctions this morning. Although these banks reported experiencing technical issues, it is conceivable that a DDoS attack is behind the observed disruptions. Payment services, however, continue to operate normally thanks to a separate network.
Context of the attack
This attack occurs during the end-of-year period, when many French people rely on postal services to send and receive Christmas gifts. The situation is even more critical as some post offices have had to close temporarily. Colissimo services, although affected, can still ensure some deliveries traditionally, without using electronic terminals.
History of cyberattacks on La Poste
La Poste, a key player in postal and banking services in France, has faced cyberattacks in the past. In 2021, a similar attack temporarily interrupted some online services. Over the years, the company has invested in cybersecurity solutions to strengthen the protection of its infrastructures. However, the current attack highlights the need for large institutions to continue evolving in the face of constantly evolving digital threats.
