Slight Decrease in Zero-Day Exploits Highlights Ongoing Cyber Threats

Slight Decrease in Zero-Day Exploits Highlights Ongoing Cyber Threats

Summary:

• Google’s security researchers counted fewer zero-day exploits in the wild in 2022 than in 2021, but the number was still high.
• Zero-days hit flaws that have no patch yet, so defenders have little warning.
• Vendors are under pressure to patch faster and improve detection.
• Layered defenses help limit the damage when a zero-day is used.

The Persistent Peril of Zero-Day Exploits

Zero-day exploits are still a serious problem, even though Google’s latest count shows fewer of them. They are dangerous because they target flaws nobody has fixed yet. Until a patch exists, defenders have little to go on.

Google’s Project Zero tracked 41 zero-days exploited in the wild in 2022, down from 58 in 2021. That was still the second-highest yearly total since Google began tracking in mid-2014. The researchers also warned that the count only covers exploits that were detected and disclosed, so the real number is likely higher.

Targeting Unpatched Vulnerabilities

A zero-day exploit takes advantage of a software flaw before the developer has released a fix. That gives attackers a head start. They can break in, steal data or plant malware while the people responsible for the system have no patch to apply.

Patch speed still matters. Once a fix ships, attackers race to use the flaw against systems that have not updated, so companies need to find and patch exposed software quickly. Google’s review also found that many of the exploits it saw were sophisticated, and that some were variants of bugs that had been patched before but not fully fixed.

Call for Enhanced Proactive Measures

Security teams cannot patch a flaw nobody knows about, so the answer is to make an attack harder to pull off and easier to see. Layered defenses help. Behavior-based detection, threat intelligence, application allowlisting and tight access controls can catch or contain an exploit even when the underlying bug is still unknown.

Sharing information between companies matters too. When one vendor spots an exploit, others can check their own products and customers can look for signs of compromise sooner.

Pioneers in Cybersecurity

Large technology companies have put money into tools that look for suspicious behavior before it becomes a full breach. Bug bounty programs also pay researchers to report flaws before criminals find them.

Google, Microsoft and other vendors also share information about exploited flaws with each other and with government agencies. That cooperation will not end zero-days. It does make each one harder to use for long.

What the Numbers Mean for Defenders

Fewer zero-days in 2022 is a small sign of progress, not a reason to relax. Attackers still found dozens of unknown flaws to use, and they keep looking. Patching quickly, detecting unusual behavior and sharing what you find remain the best defense for the data and systems people rely on.

Fred Templeton, CISA, CASP, SEC+

Fred Templeton is a practicing Information Systems Auditor in the Washington DC area. Fred works as a government contractor and uses his skills in cyber security to make our country's information systems safer from cyber threats. Fred holds a master's degree in cybersecurity and is currently working on his PHD in Information Systems.