According to iThome, Union Optronics announced on August 3 that it received notification of a ransomware attack on its information systems and initiated internal security inspections and incident response [1]. The company stated that its information systems are gradually resuming normal operations, a police report has been filed, and preliminary assessments indicate no impact on operations [1]. Union Optronics has reviewed security logs, strengthened network defenses, and will continue intensive system monitoring [1].
This event has not been officially confirmed. Content is based on media or third-party reports.
Backfill: this event became public on Aug 3, 2026 and we added it on Nov 10, 2026. It is not a new event.
HighMonitoringBackfillMedia reported
Union Optronics says ransomware hit its IT systems, which are gradually coming back, and that it filed a police report
1 min read
- Disclosed
- Aug 3, 2026
- Published
- Nov 10, 2026
- Last updated
- Nov 10, 2026
- CVSS basis
- Our assessment
On this page
30-second summary
What happened
Who is affected
Industries mainly affected: Cross-industry
What to do nowOur advice
Union Optronics has reviewed security logs, strengthened network defenses, and will continue intensive system monitoring [1].
Timeline
- Media reports company published material announcement on this date[1]
Technical details
Verified Incident and Response
According to iThome, Union Optronics announced on August 3 that it received notification of a ransomware attack on its information systems and initiated internal security inspections and incident response [1].
The company stated that its information systems are gradually resuming normal operations, a police report has been filed, and preliminary assessments indicate no impact on operations [1].
Union Optronics has reviewed security logs, strengthened network defenses, and will continue intensive system monitoring [1].
References
Media1
- [1]
“8月3日上午11時，光通訊廠聯合光纖通信（4903） 於股市公開資訊觀測站發布重大訊息 ，表示當日他們收到資訊系統遭受勒索病毒攻擊的訊息，隨即展開內部資安檢查並啟動應變措施，目前所有資訊系統陸續恢復正常運作，公司也已向警方報案，初步評估事件不會對營運造成影響。”
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