Huawei zero-day attack behind last years crash of Luxembourgs telecoms network
A zero-day attack on Huawei's enterprise router software caused a significant telecoms outage in Luxembourg last year. The attack exploited an undisclosed vulnerability, leading to a nationwide disruption of mobile, landline, and emergency services for over three hours. Despite the incident's severity, Huawei has not publicly acknowledged the flaw or provided a patch since the attack occurred.
- ▪The attack caused a nationwide telecoms outage in Luxembourg, disrupting communications for more than three hours.
- ▪The incident was described as a denial-of-service attack that exploited a non-public vulnerability in Huawei's router software.
- ▪No public warning or CVE identifier has been issued regarding the vulnerability since the incident.
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Image: Olaf Kosinsky via WIkimedia Commons (CC BYSA 3.0)Alexander MartinMay 19th, 2026Huawei zero-day attack behind last year’s crash of Luxembourg's entire telecoms network An attack exploiting a previously unknown vulnerability in Huawei enterprise router software caused a nationwide telecoms outage in Luxembourg last year, according to multiple sources briefed on the matter, disrupting mobile, landline and emergency communications for more than three hours. The vulnerability has never been publicly disclosed. No CVE identifier — used by cybersecurity professionals worldwide to track software flaws and protect their systems — has been filed in any public database in the ten months since the incident, and no public warning has been issued to other operators running the same equipment.
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