**Major Cyberattack Disrupts La Poste and French Banking Services Ahead of Christmas**
On Monday, December 22, 2025, a large-scale DDoS (Distributed Denial of Service) cyberattack crippled critical services of La Poste, France’s national postal operator, and its banking subsidiary, La Banque Postale. The attack, which began around 6:30 AM, rendered key platforms—including Colissimo (parcel shipping), Digiposte (digital storage), and postal labeling systems—unavailable, disrupting last-minute holiday deliveries and financial services just 48 hours before Christmas.
The outage was severe enough to prompt La Poste’s management to authorize the closure of select post offices, though payment systems remained operational due to a separate, unaffected data stream. While the group confirmed the incident as a DDoS attack, some experts questioned whether the disruption stemmed from a more sophisticated breach, given the scale of the downtime.
Other major French banks—including Caisse d’Épargne and Banque Populaire—also experienced slowdowns or service interruptions the same morning. Both institutions attributed the issues to "dysfunction" rather than a cyberattack, though speculation persists about a potential coordinated campaign.
The attack’s timing exacerbated its impact, as millions of customers relied on La Poste’s services for urgent parcel shipments and digital banking access. While La Banque Postale’s mobile app and website gradually resumed functionality, La Poste’s main site remained offline for hours. The incident follows a similar disruption on December 20, raising concerns about repeated targeting of critical infrastructure.
No group has claimed responsibility, but the scale and persistence of the attacks suggest possible state-backed involvement, with some analysts pointing to pro-Russian hacking collectives active in recent French cyber incidents. As of reporting, no data breaches or unauthorized system access have been confirmed.
La Banque Postale cybersecurity rating report: https://www.rankiteo.com/company/la-banque-postale
Caisse d’Epargne cybersecurity rating report: https://www.rankiteo.com/company/caissedepargne
Crédit Mutuel cybersecurity rating report: https://www.rankiteo.com/company/credit-mutuel
"id": "LA-CAICRE1766406599",
"linkid": "la-banque-postale, caissedepargne, credit-mutuel",
"type": "Cyber Attack",
"date": "12/2025",
"severity": "100",
"impact": "5",
"explanation": "Attack threatening the organization's existence"{'affected_entities': [{'customers_affected': 'Millions (clients bancaires, '
'expéditeurs/récepteurs de '
'colis)',
'industry': 'Poste, logistique, services financiers',
'location': 'France',
'name': 'La Poste',
'size': 'Grand groupe (leader en France)',
'type': 'Groupe postal et logistique'},
{'customers_affected': 'Millions de clients',
'industry': 'Services financiers',
'location': 'France',
'name': 'La Banque Postale',
'size': 'Grande banque (première banque de France)',
'type': 'Banque'},
{'industry': 'Services financiers',
'location': 'France',
'name': "Caisse d'Épargne",
'size': 'Grande banque',
'type': 'Banque'},
{'industry': 'Services financiers',
'location': 'France',
'name': 'Banque Populaire',
'size': 'Grande banque',
'type': 'Banque'},
{'industry': 'Services financiers',
'location': 'France',
'name': 'Crédit Mutuel',
'size': 'Grande banque',
'type': 'Banque'},
{'industry': 'Services financiers',
'location': 'France',
'name': 'CIC',
'size': 'Grande banque',
'type': 'Banque'},
{'industry': 'Services financiers',
'location': 'France',
'name': 'Crédit Agricole',
'size': 'Grande banque',
'type': 'Banque'},
{'industry': 'Services financiers',
'location': 'France',
'name': 'BNP Paribas',
'size': 'Grande banque',
'type': 'Banque'}],
'attack_vector': 'Inondation de requêtes et connexions',
'customer_advisories': 'Appels à la patience, informations sur '
"l'indisponibilité des services",
'date_detected': '2025-12-22T06:30:00',
'date_publicly_disclosed': '2025-12-22',
'description': 'Une cyberattaque de type DDoS a touché les services de La '
'Poste (Colissimo, étiquetage, affranchissement, distribution '
'des colis, Digiposte) et La Banque Postale, rendant de '
"nombreux services inaccessibles. D'autres établissements "
"bancaires comme Caisse d'Épargne et Banque Populaire ont "
"également été impactés, bien qu'ils aient attribué le "
"problème à un dysfonctionnement. L'attaque a ciblé "
"l'interconnexion entre un datacenter et le réseau internet du "
"groupe La Poste, provoquant des pannes majeures à l'approche "
'de Noël.',
'impact': {'brand_reputation_impact': 'Grave (perte de confiance, '
'perturbation des services critiques '
'pendant les fêtes)',
'downtime': 'Plus de 48 heures (en cours au 22/12/2025)',
'operational_impact': 'Fermeture de certains bureaux de poste, '
'perturbation des livraisons de colis, '
'inaccessibilité des services bancaires en '
'ligne',
'payment_information_risk': 'Exclu (flux de paiement spécifique '
'non affecté)',
'systems_affected': 'Services en ligne (Banque Postale, Colissimo, '
'Digiposte, étiquetage, affranchissement, '
'distribution des colis), datacenter'},
'investigation_status': 'En cours',
'motivation': 'Perturbation des services critiques, possible motivation '
'géopolitique',
'references': [{'date_accessed': '2025-12-22', 'source': 'Clubic'},
{'date_accessed': '2025-12-22',
'source': 'Sinon (source interne)'}],
'response': {'communication_strategy': 'Communiqués officiels minimisant '
"l'impact (qualifié de "
"'dysfonctionnement' par certaines "
'banques)',
'recovery_measures': 'Rétablissement partiel des services '
'(Banque Postale fonctionnelle en partie le '
'22/12/2025)'},
'threat_actor': 'Probablement soutenu par un État voyou (pro-russe suggéré)',
'title': 'Cyberattaque DDoS contre La Poste et La Banque Postale',
'type': 'DDoS',
'vulnerability_exploited': 'Interconnexion entre datacenter et réseau '
'internet'}