In this blog we explore why daily vulnerability scanning of digital assets isn’t enough to keep businesses safe from vulnerabilities and threats.
Technological advancements and the widespread adoption of cloud computing have transformed how organizations operate. With the need for agility and speed, businesses have increasingly turned to cloud environments to streamline their development processes and scale operations. The cloud has enabled faster innovation cycles, offering flexible resources and real-time collaboration. This shift has made continuous integration and deployment (CI/CD) practices essential, allowing development teams to push out updates and new features multiple times daily, enhancing business responsiveness and customer satisfaction.
However, with this rapid pace of development comes increased risk. While effective in accelerating workflows, cloud environments and CI/CD pipelines can also introduce security vulnerabilities if not managed correctly. The constant updates and changes, as well as the sheer volume of deployments, can lead to misconfigurations or overlooked security flaws.
If these vulnerabilities aren’t caught early, they leave businesses exposed to potential attacks. Legacy security techniques are reactionary and ill-equipped to handle the new paradigms of development.
Traditional security approaches have long relied on scheduled vulnerability scans, often conducted daily or weekly for critical targets, and monthly or critical for less critical systems. Daily scans have become the standard for many security products under the assumption that there would be ample buffer time between the discovery of a vulnerability and its exploitation by attackers. However, the fast pace of today’s cyber threat landscape has rendered this assumption obsolete, creating critical security gaps for organizations that continue to rely on daily scanning.
A key concept to understand here is the “window of exposure” — the period between when a vulnerability is introduced and when it is detected and remedied. During this time, attackers can discover and exploit the vulnerability, potentially leading to breaches. With daily scans, this window remains open far longer than necessary, leaving systems exposed for hours, or even an entire day, before the following scheduled scan detects the issue.
Even though daily vulnerability scanning might seem like a reasonable compromise, it’s still too slow in today’s rapidly changing attack surfaces. An entire 24-hour window is significant enough to give attackers a head start, especially when brand new CVE’s can become weaponized exploits in a matter of hours.
Development cycles were predictable in the past, often spanning weeks or even months. Security strategies were designed to accommodate these slower timelines, with periodic checks aligned with longer development schedules. However, modern development practices have completely transformed this model. Today, rapid iteration and multiple daily deployments have become the norm, driven by the rise of DevOps and cloud computing. This shift necessitates far quicker security responses. Additionally, the complexity of modern systems has dramatically increased, with integrated cloud services and microservices architectures introducing a web of interdependencies that are much harder to secure. This complexity requires a more agile and responsive security approach to ensure vulnerabilities don’t slip through the cracks.
With continuous integration and deployment practices now standard, the frequency of system changes has risen sharply, and with each change, the potential for new vulnerabilities is introduced. Static, periodic security assessments are no longer sufficient to keep up with this rapid pace.
Instead, security strategies must evolve toward continuous monitoring and real-time assessments, ensuring that vulnerabilities are identified and addressed as soon as they appear. This approach minimizes the “window of exposure” and helps maintain a more robust security posture.
Some vulnerabilities appear and disappear under specific conditions. These temporary security weaknesses present detection challenges that even the best traditional scanners often miss (due to the daily frequency). Often, these scenarios can happen with cloud infrastructure during auto-scaling events, permissions management, or more. Scheduled daily vulnerability scanning would need to chance upon these vulnerabilities during their lifespan.
Motivated and opportunistic attackers relentlessly pursue new vulnerabilities, even in previously considered secure technologies. Continuous exploit development is a key tactic used by cybercriminals. They actively dissect and reverse-engineer popular software to uncover hidden flaws, constantly staying ahead of the curve by developing exploits for widely used systems. Even previously deemed “safe” technologies can become vulnerable as attackers find new ways to exploit their weaknesses. Even when a vendor discovers their weakness, there is still a significant lag time of when attackers have known about a vulnerability versus when the vendor discloses that they have patched the vulnerability in their own software. This persistent threat landscape means that security teams cannot afford to rely on outdated assumptions about safety, as attackers are constantly innovating.
In addition to developing new exploits, attackers constantly scan the internet for exposed infrastructure, looking for any vulnerabilities or misconfigurations to exploit. This relentless probing allows them to identify potential weaknesses, such as open ports, outdated software, or incorrect settings, that can be used as entry points. Configuration errors, in particular, have always presented a prime opportunity for attackers. Often, these mistakes occur due to the complexity of modern security settings or simple oversight. Attackers patiently wait for these lapses, using them to gain a foothold in otherwise well-protected systems.
The focus must shift from merely reacting to incidents to a more preventive approach. While traditional security response models aim to minimize damage after an attack, their reactive nature still leaves room for compromise. The real challenge lies in preventing breaches before they happen, protecting valuable data, and maintaining uninterrupted operations.
To achieve this, security strategies need to evolve, adopting a more preemptive stance driven by continuous monitoring, early detection, and a mindset shift toward anticipation.
Traditional security models focus on detecting and responding to attacks after it occurs. While rapid response reduces damage, it still has some impact, be it disclosed data or operational disruption. Shifting from reactive to preemptive security aims to prevent damage from ever occurring.
This shift is made possible by advancements in security technologies, such as early detection systems that continuously monitor for potential exposures. These technologies enable organizations to identify vulnerabilities before attackers can exploit them. They use techniques to analyze and identify high-signal vulnerabilities, ensuring that security teams can respond to actual exploitable issues rather than wasting time on false positives.
Beyond the technological improvements, there has also been a significant cultural shift within organizations toward adopting Preemptive Threat Exposure Management strategies. Instead of relying solely on reacting to incidents, businesses focus on anticipating threats and taking preventive measures. This shift in mindset enhances security and proves to be more cost-effective in the long run, reducing the likelihood of expensive breaches and minimizing financial losses, reputational damage, and the operational downtime associated with security incidents.
Continuous security monitoring helps close the window of opportunity for attackers looking for new vulnerabilities to exploit. By implementing ongoing monitoring, organizations can protect against known threats while swiftly identifying and addressing new vulnerabilities. The ability to detect threats as they occur allows security teams to respond in real time, mitigating potential damage before it escalates into a more serious breach. Just as attackers work tirelessly to discover weaknesses, continuous monitoring ensures that security measures keep pace.
With attackers relentlessly probing for weaknesses, waiting 24 hours between vulnerability scans leaves your organization vulnerable to exploitation and catastrophic damage. The Assenote Attack Surface Management platform helps helps close this gap in two ways.
First, Searchlight’s continuous attack surface monitoring scans current and new assets hourly and detects vulnerabilities as they emerge, rather than the following day. These real-time exposure discoveries in your attack surface are also verified and provable as the platform will provide an exact proof of concept so a security analyst can easily replicate the finding for themselves. By providing the method to replicate, security teams do not need to waste precious time in checking if the finding is a false positive in the first place.
Second, our own security research and “exploit” development team leads the industry in actively identifying exploitable vulnerabilities in popular third-party software our customers rely on. Upon disclosure to the vendor, corresponding vulnerability checks are added to the platform so customers are notified much earlier. Often, customers have already mitigated or remediated their systems’ vulnerabilities long before the vendors have released their own writeup.
Preemptive Threat Exposure Management is how organizations can close the 24-hour window and maintain a more secure and resilient posture against cyber threats.
Daily scanning creates a 24-hour window of exposure between each scan. In today’s threat landscape, new CVEs can be weaponised within hours of discovery, meaning attackers can find and exploit a vulnerability long before the next scheduled scan detects it. Continuous or hourly scanning dramatically reduces this window.
The window of exposure is the period of time between when a vulnerability is introduced into a system and when it is detected and remediated. The longer this window, the greater the risk of a successful attack. Continuous vulnerability scanning minimises this window by detecting new exposures as they emerge rather than the following day.
Ephemeral vulnerabilities are temporary security weaknesses that appear and disappear under specific conditions — for example, during cloud auto-scaling events or changes in permissions management. Because they exist only briefly, daily scheduled scans are unlikely to catch them during their lifespan. Continuous monitoring significantly improves the chances of detecting these transient risks.
Traditional vulnerability scanning runs on a fixed schedule (daily, weekly, or monthly) and provides a point-in-time snapshot of your security posture. Continuous attack surface monitoring, by contrast, scans assets on an ongoing basis – in Searchlight’s case, hourly – detecting new vulnerabilities as they emerge, verifying findings with proof-of-concept evidence, and alerting security teams in near real time.
Organisations should partner with security vendors that have dedicated research teams actively identifying vulnerabilities in widely used third-party software. Searchlight, for example, adds vulnerability checks to its platform upon vendor disclosure – often meaning customers have already remediated an issue before the vendor has published their own advisory. Combined with hourly scanning, this approach ensures organisations are notified and protected as early as possible.
Michael Gianarakis has worked in the security industry for over a decade building and managing offensive security teams across the Asia Pacific and Japan. In 2018 he co-founded the Attack Surface Management company Assetnote, which was acquired by Searchlight Cyber in 2025. Michael is now SVP of ASM at Searchlight. Michael has presented his security research around the world including at DEF CON, Black Hat Asia, BSides, Las Vegas, Hack in the Box, AusCert, Thotcon, 44Con and OWASP.
