InfoSecBulletin Cybersecurity for mankind

Security experts have shown that expired credit cards can still be used. A study from the University of Massachusetts Amherst, shared at the 35th USENIX Security Symposium, presents a new NFC relay attack called “Zombie Card” that can make expired Visa contactless cards work again, letting them make real purchases …

CERT Polska has alerted that bad actors are actively exploiting a security flaw in Zimbra Collaboration Suite to execute code remotely. The bug known as CVE-2026-73570 lets attackers who are not logged in run any commands on affected servers as the zimbra user. There is a flaw with Zimbra’s SNMP …

Operation CameraSwarm compromised 14,500+ Dahua IP cameras mostly in Ukraine and Russia. The operation lasted for at least 35 days from June 17 to July 22. It took control of devices by finding weak spots, guessing passwords, and using offline recovery codes from serial numbers for cloud-connected cameras. Researchers at …