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Background for this topic.
Exploit is a piece of software, a chunk of data, or a sequence of commands that takes advantage of a bug or vulnerability in order to cause unintended or unanticipated behavior to occur on computer software, hardware, or something electronic (usually computerized). This behavior often includes such things as gaining control of a computer system, allowing privilege escalation, or a denial-of-service attack.
In the context of information security, an exploit typically allows an attacker to gain access to a system or network and possibly provide the attacker with elevated privileges. Exploits are often the first step in a larger attack campaign where an initial foothold is established by the attacker, who might then deploy further malicious activities, such as data exfiltration, ransomware, or persistent access for future exploitation. Security professionals actively work to discover and patch vulnerabilities to prevent these exploits, while attackers continuously seek out new ones as a means of bypassing security measures.
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Exploiting the PAN-OS GlobalProtect VPN vulnerability requires certain conditions, but adversaries have done so in two attack waves that started in mid-May.
Rapid7: Attackers exploit authentication bypass flaw in the wild, meaning more emergency patching for PAN-OS users
Palo Alto Networks has disclosed that threat actors may have attempted to unsuccessfully exploit a recently disclosed critical security flaw as early as April 9, 2026