Cybersecurity researchers have confirmed that attackers are actively exploiting a critical vulnerability in Adobe ColdFusion, tracked as CVE-2026-48282, only hours after Adobe released security updates.
The flaw carries the highest severity rating and allows attackers to execute remote code on vulnerable servers without requiring authentication.
The vulnerability affects Adobe ColdFusion versions 2025.9, 2023.20, and earlier. Adobe issued patches this week, warning that the flaw poses a high risk of exploitation and urging administrators to install the updates within 72 hours.
According to vulnerability intelligence firm KEVIntel, real-world attacks began less than two hours after Adobe publicly disclosed the vulnerability. The company’s global honeypot network detected threat actors attempting to exploit unpatched ColdFusion servers almost immediately, highlighting how quickly cybercriminals weaponize newly disclosed security flaws.
The Canadian Centre for Cyber Security has also warned that the vulnerability is being actively exploited and is urging organizations to update affected systems without delay. Security experts recommend reviewing exposed ColdFusion servers and applying the latest patches as soon as possible to prevent compromise.
Internet security monitoring service Shadowserver currently tracks nearly 800 Adobe ColdFusion instances exposed to the internet, although it is unclear how many remain vulnerable or are intentionally configured as honeypots for research purposes.
The warning follows another recent round of Adobe security updates that fixed six additional critical vulnerabilities affecting ColdFusion and Campaign Classic. Earlier this year, Adobe also released emergency patches for a zero-day vulnerability in Acrobat Reader that had been exploited in attacks for several months before being fixed.
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Adobe products continue to be a frequent target for cybercriminals. Since 2021, the U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added dozens of Adobe vulnerabilities to its catalog of actively exploited flaws, with several also linked to ransomware attacks. Organizations using Adobe ColdFusion are strongly advised to update immediately, as unpatched systems are already being targeted in the wild.
Hackers Begin Exploiting Critical Adobe ColdFusion Flaw Just Hours After Patch Release
