Zendesk spam wave returns, floods users with 'Activate account' emails

A renewed global spam wave is exploiting unsecured Zendesk support ticket submission forms to generate legitimate-looking automated emails (such as "Activate your account") and flood recipients' inboxes; users report receiving hundreds of messages that bypass spam filters by appearing to originate from real companies' Zendesk instances. The activity mirrors a January campaign, suggesting attackers can still abuse exposed ticket portals despite Zendesk's implemented safeguards.