Jihyeon JeongJack BicerSeoul National UniversityMicrosoft CorporationAction1GoogleMicrosoft

Google patches Chrome zero-day exploited by hackers as Chrome 153 ships with 230 security fixes; Microsoft's September Patch Tuesday sets record with 974 CVEs

Google has released Chrome 153, addressing a zero-day vulnerability exploited by hackers, alongside 230 other security fixes. Meanwhile, Microsoft’s September Patch Tuesday set a record with 974 CVEs, including 114 critical vulnerabilities across its product suite, highlighting the growing urgency for timely updates.

Bitdefender Bitdefender+2 sources9 September 2026 · 16:06 UTC
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Google's Chrome 153 has been released with critical security updates, including a fix for CVE-2026-87491, an actively exploited vulnerability in the V8 JavaScript engine. Users are urged to update promptly to mitigate risks from potential cyberattacks.

The update addresses a total of 230 security fixes across platforms including Windows, macOS, Linux, and Android. Google emphasizes the importance of timely updates, stating, “Even if you don't consider yourself a high-risk target, installing security updates promptly is one of the easiest ways to reduce your exposure to cyberattacks.”

In parallel, Microsoft's September Patch Tuesday has set a new record with 974 CVEs, surpassing previous months significantly. This includes 114 critical vulnerabilities affecting various products such as Windows, Office, and Azure. The surge in vulnerabilities patched this month follows a warning from Microsoft about an expected increase in security updates due to enhanced vulnerability discovery tools.

Jack Bicer, director of vulnerability research at Action1, noted, “At this scale, the challenge is not simply getting through the patch list. It is knowing what needs attention first.” The update highlights the need for organizations to adopt a risk-based approach to vulnerability management, prioritizing the most critical flaws.

As cyber threats evolve, both Google and Microsoft stress the importance of maintaining updated software to protect against exploitation.

Key Insight
“The Chrome zero-day, tracked as CVE-2026-87491, does not affect iOS, but Android users should update via Google Play. Microsoft's record-breaking update includes fixes for 114 Critical flaws, with Windows affected by 723 CVEs, and two actively exploited zero-days in Windows ALPC and Windows Update Stack.”
CuriousCats studied:
1
BitdefenderBitdefender
“Google has released Chrome 153 with security fixes for desktop and Android users, including a vulnerability that attackers are already exploiting in the wild.”
Bitdefender →
2
Petri IT KnowledgebasePetri IT Knowledgebase
“Microsoft addressed 974 vulnerabilities in its September 2026 Patch Tuesday release.”
Petri IT Knowledgebase →
3
Infosecurity MagazineInfosecurity Magazine
“Microsoft has announced fixes for a record 974 CVEs in its September 2026 Patch Tuesday release.”
Infosecurity Magazine →
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