New HollowGraph malware uses Microsoft Graph for stealthy C2 comms

2026-07-20T19:23:29Z888f55e2c2c9181d9e420ff07d630e6fac7d385ff268b1312271bf920ec7ea4e
7-ZipACR StealerCVE-2026-6875DDoSHollowGraphHugging Face breachMicrosoft 365Microsoft GraphOpenSSLServiceNowWSUSWordPressautonomous agentcalendar C2command-and-controlcredential theftdata exfiltrationexploitationincident responsemalwarepatchesremote code executionsupply-chainwp2shell

What happened

Multiple active threats and high-impact incidents reported: HollowGraph malware leverages Microsoft Graph (calendar entries in Microsoft 365 mailboxes) as a stealthy C2 and exfiltration channel; a critical ServiceNow AI Platform remote code execution vulnerability (CVE-2026-6875) is now being exploited in the wild; Hugging Face disclosed a breach via an autonomous AI agent leading to exfiltration of internal datasets and credentials. Additional coverage includes exploited and patched RCEs (7-Zip, WordPress “wp2shell”), a surge in ACR Stealer activity targeting enterprise credentials/tokens, an

Why it matters

A reviewed impact interpretation has not been published for this record.

Evidence and limitations

Source ID
bleepingcomputer
Record identifier
888f55e2c2c9181d9e420ff07d630e6fac7d385ff268b1312271bf920ec7ea4e
Enrichment time
2026-07-20T19:23:29Z
AI-assisted enrichment
Yes

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