India's Computer Emergency Response Team (CERT-In) says defenders should endevor to patch or mitigate exploited n-day vulnerabilities within 12 hours as the cybercrime landscape continues its AI-ification. The organization's recommended half-day window applies only to bugs that affect internet-facing or "crown jewel" systems and are known to be exploited. In these cases, CERT-In told defenders to "patch, mitigate, or remove exposure within 12 hours where feasible." For other flaws, such as a standard critical vulnerability (CVSS 9.0 or higher) affecting an internal system, or a known exploited bug affecting an internal system, defenders can enjoy a much more leisurely 24-hour window. The revised suggestions come as part of a new guide released by CERT-In this week to help infosec pros better protect against AI-assisted cyberattacks. "AI-assisted cyber exploitation reduces the time required for adversaries to identify, weaponize, and exploit vulnerabilities, exposed services, weak identities, insecure APIs, and misconfigured systems," CERT-In's report reads. "As organizations become increasingly dependent on interconnected digital infrastructure, cloud ecosystems, software supply chains, operational technologies, and AI-enabled platforms, the potential impact of AI-enabled cyber threats continues to increase across sectors." CERT-In's report follows a trail of news stories in 2026 that all suggest AI is becoming an increasingly important part of cybersecurity for both attackers and defenders. The field of agentic AI has especially matured rapidly in the past year. Consumer-grade tools like OpenClaw have made it easier for non-technical users to experiment with autonomous tech, raising its profile and awareness of its capabilities. Agents are equipped with all the necessary permissions to make significant system changes, but as global intelligence agencies recently highlighted, their behavior can at times be unexpected, and they're also prone to mischief. Security pros are starting to see the potential for AI agents in their workflows, but for attackers, the technology represents an opportunity to hasten all parts of their process, from recon and exploitation to privilege escalation and data theft. CERT-In cited agentic AI as one of the core concerns behind the report's recommendations, and because of the disparate supply chains on which organizations are increasingly reliant, any vulnerability can lead to cascading damage on interconnected systems. Beyond agentic AI, the launches of frontier models such as Anthropic's Mythos and OpenAI's GPT-5.5, two certified cyber workhorses, threaten to empower attackers further with capabilities to uncover and exploit critical vulnerabilities at pace. A 12-hour window: Is it feasible? Any cybersecurity practitioner will attest to the onerous nature of the patching process, and how it's not as easy as clicking "Update," which is why a 12-hour patch window might seem initially unrealistic to some. Urgent warnings and demands for immediate patching are routinely delivered alongside critical vulnerability disclosures, but these fail to account for the downtime required to apply patches, or the testing required to prove that by applying them, everything else won't break. Microsoft has had its fair share of these cases, for example, and many readers will have borne the brunt. CISA's Known Exploited Vulnerabilities catalog is another prominent resource that sets patching deadlines, albeit only for federal agencies, but these are typically set at two to three weeks, or a number of days for the most serious vulnerabilities. The cybersecurity pros who spoke to The Register, weighing in on the CERT-In recommendations, agreed that 12 hours is far too short a window to properly test and deploy a patch, although they said the organization was on to something with its approach. Dray Agha, senior manager of security operations at Huntress, said that CERT-In’s recommendation to "patch, mitigate, or remove exposure within 12 hours where feasible" was solid advice, largely because of the caveat that it doesn’t necessitate a full patch within that time. "By explicitly encouraging temporary mitigations, such as isolation, access restriction, or disablement until a patch is ready, this turns the patching deadline into a highly feasible and necessary containment strategy," Agha told The Register. "And this corroborates the guidance we dispense at Huntress for critical threats: we often advise our community to deploy temporary mitigations to 'get them out of trouble' as soon as humanly possible, and then come up with a more coordinated strategy for patching that respects the business's need to function in its enterprises." Agha added that AI-assisted cyberattacks are seen every day in the wild, compressing the time taken to exploit vulnerabilities, meaning defenders must adapt to this new reality. In the pre-AI days, a 12-hour window to mitigate or patch a known exploited vulnerability was seen as excessively tight, but increased availability of advanced tooling and automation is reshaping the demands of vulnerability management. "Defenders must fundamentally reshape their operations to focus on quicker mitigations – prior to AI, at Huntress, we have seen vulnerabilities exploited within a handful of hours, let alone a full 12 hours," said Agha. He said the 12-hour guideline is less about an arbitrary clock, more about "forcing a necessary readjustment in how organizations drive their security approaches to be beyond compliance and move to a continuous defensive posture. "And this will involve the enterprise functions of the business being a part of the security posture – not just IT, thank you very much – as the consequences of AI-driven exploitation mean faster, higher impact cascading negatives on a targeted business; much better to proactively defend than reactively recover." ®
