# Athens OASA telematics system outage

> Live situation record from CLSTR: https://clstr.news/situations/athens-oasa-telematics-system-outage
> Updated: 2026-08-29T07:22:28.000Z. Sources: 16. Developments: 2.

A technical failure in the OASA telematics system in Attica has caused a multi-day disruption to real-time public transport information in Athens. The outage affects the OASA Telematics mobile application, the official website, and digital displays at bus and trolley stops, which have been showing a ‘test mode’ message.

While the outage has prevented passengers from tracking vehicle locations or estimated arrival times, OASA has maintained that bus and trolley routes continue to operate normally. Although rumors of a cyberattack circulated, some internal sources initially denied hacking, categorizing the event as a technical issue. By the third day of the outage, transport unionists raised concerns regarding a potential cyberattack, though OASA has not confirmed or denied such a possibility.

Following an investigation into the incident, which has been described as serious, technical teams are working toward a gradual restoration of the system. A credit of 15,000 euros has been allocated to facilitate investigative services.

## Claims

- The telematics system failure has not impacted the actual operation of bus and trolley schedules. (corroborated by 3 sources)
- The telematics system has been non-functional since the early hours of Thursday. (corroborated by 3 sources)
- The outage affects digital displays at smart stops, the OASA Telematics mobile app, and the official website. (corroborated by 3 sources)
- Technical teams are currently working on the gradual restoration of the telematics system. (single source)
- A credit of 15,000 euros has been allocated to investigate the incident. (single source)
- Transport unionists have suggested the outage might be the result of a cyberattack or hacking. (single source)

## Timeline

### 2026-08-29: OASA telematics outage disrupts Athens public transport information

A three-day telematics outage in Athens has disabled OASA's real-time passenger information systems, affecting mobile apps, websites, and digital stop displays, though vehicle schedules remain operational.

8 sources. https://clstr.news/cluster/oasa-telematics-outage-disrupts-athens-public-transport-information

### 2026-08-27: OASA telematics system outage disrupts Athens public transport

A major technical failure in OASA's telematics system has left Athens public transport users without real-time arrival information for a second day, causing significant delays and uncertainty.

12 sources. https://clstr.news/cluster/oasa-telematics-system-outage-disrupts-athens-public-transport

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Cite as: Athens OASA telematics system outage. CLSTR, https://clstr.news/situations/athens-oasa-telematics-system-outage