Cybersecurity firm Zscaler has confirmed it fell sufferer to a widespread supply-chain assault that uncovered buyer contact info via compromised Salesforce credentials linked to advertising platform Salesloft Drift.
The breach, disclosed on August 31, 2025, stems from a bigger marketing campaign focusing on Salesloft Drift’s OAuth tokens that has impacted over 700 organizations worldwide.
Zscaler emphasised that the incident was confined to its Salesforce surroundings and didn’t have an effect on any of its core safety merchandise, providers, or underlying infrastructure.
The safety incident originated from a complicated supply-chain assault orchestrated by menace actor UNC6395, which Google Risk Intelligence Group and Mandiant researchers have been monitoring since early August 2025.
Between August 8-18, 2025, attackers systematically compromised OAuth tokens related to Salesloft Drift, an AI-powered chat agent built-in with Salesforce databases for gross sales workflow automation.
UNC6395 demonstrated superior operational capabilities through the use of these stolen tokens to authenticate immediately into Salesforce buyer cases, bypassing multi-factor authentication completely. The menace actors employed Python instruments to automate the information theft course of throughout a whole lot of focused organizations.
Data Compromised at Zscaler
Based on Zscaler’s official assertion, the compromised knowledge was restricted to generally out there enterprise contact particulars and Salesforce-specific content material, together with:
Names and enterprise electronic mail addresses
Job titles and telephone numbers
Regional and site particulars
Zscaler product licensing and business info
Plain textual content content material from sure assist circumstances (excluding attachments, information, and pictures)
“After intensive investigation, Zscaler has at present discovered no proof to recommend misuse of this info,” the corporate said. Nonetheless, the breach highlights the vulnerability of third-party integrations in trendy SaaS environments.
The Zscaler incident represents only one piece of what safety researchers are calling the most important SaaS breach marketing campaign of 2025. Google’s Risk Intelligence Group estimates that over 700 organizations have been impacted by this supply-chain assault.
Initially believed to focus on solely Salesforce integrations, the marketing campaign’s scope expanded considerably when Google confirmed on August 28 that OAuth tokens for Drift E-mail had been additionally compromised, offering attackers with restricted entry to Google Workspace accounts. Most victims are know-how and software program firms, creating potential cascading supply-chain dangers.
Zscaler acted swiftly to comprise the incident by revoking Salesloft Drift’s entry to its Salesforce knowledge and rotating API entry tokens as a precautionary measure. The corporate launched a complete investigation in collaboration with Salesforce and applied further safeguards to forestall related incidents.
On August 20, 2025, Salesloft and Salesforce collaborated to revoke all lively entry and refresh tokens related to the Drift utility. Salesforce additionally eliminated the Drift utility from its AppExchange market pending additional investigation.
This incident underscores essential vulnerabilities in SaaS-to-SaaS integrations that usually bypass conventional safety controls. OAuth tokens, as soon as compromised, present persistent entry with out triggering authentication alerts or requiring passwords.
Whereas no proof of knowledge misuse has been discovered, Zscaler urges prospects to take care of heightened vigilance towards potential phishing assaults or social engineering makes an attempt that might leverage the uncovered contact particulars. The corporate emphasizes that official Zscaler assist won’t ever request authentication particulars via unsolicited communications.
Organizations utilizing third-party SaaS integrations are suggested to overview all linked functions, revoke overly broad permissions, and implement steady monitoring for uncommon question exercise or large-scale knowledge exports.
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