Both companies have reported the incidents to the relevant authorities

Vallianz Holdings, an offshore and marine firm, said an unknown party has gained unauthorised access to its servers - the second Singapore-listed company to report such an incident in less than a week.

Just on Dec 23, foodstuffs and consumer goods maker PSC Corp said it encountered a cyber incident as well.

Both companies made their respective announcements via the Singapore Exchange S68 website.

According to Vallianz on Dec 28, it has contained the incident with the help of external consultants and has reported the incident to "relevant authorities".

Citing its preliminary assessment, Vallianz believes there is no significant impact on its business operations.

Similarly, in its announcement on Dec 23, PSC Corp said an unknown party gained unauthorised access to its servers.

The company, with the help of external consultants, was able to promptly restore access to the affected data via the backup systems.

"Consequently the impact on the group’s operations was minimal," says PSC Corp.

According to the company's preliminary assessment, the attack does not have any material financial impact on its business. 

PSC Corp says it has reported the Incident to the police and also the Personal Data Protection Commission Singapore.

Vallianz Holdings shares last traded at 3.5 cents, up 16.67% year to date.

PSC Corp last traded at 33 cents, up 1.56% year to date.