Google fixes actively exploited Pixel modem zero-day CVE-2026-58704 in September 2026 security update

Google released September 2026 security updates for Pixel phones and fixed an actively exploited zero-day affecting supported devices. The flaw, CVE-2026-58704, is a high-severity permission bypass in the Cellular Modem component that can allow adjacent-network attackers to escalate privileges without user interaction; the Pixel bulletin also fixes 109 other vulnerabilities and ships at patch level 2026-09-05.
Why it matters: Pixel users are at risk from a real-world exploited flaw, so this is an update-now issue for supported devices. Organizations that manage Pixel fleets should push the September 2026 patch immediately and verify devices reach the 2026-09-05 security level.

Sources

Google Pixel phones pwned in zero-click attacks
2026.09.16 97% relevant
This article updates the same underlying event by adding that CISA has placed CVE-2026-58704 in the KEV catalog, given federal agencies three days to patch, and describing the flaw as enabling zero-click attacks in Pixel cellular modems.
Pixel Modem Zero-Day Exploited in Targeted Attacks
Eduard Kovacs 2026.09.16 98% relevant
This article is a direct update on the same event: Google’s patch for CVE-2026-58704. It adds that the flaw is a high-severity permission bypass in the Pixel cellular modem, requires no user interaction, can enable adjacent/proximal privilege escalation, and was exploited in limited targeted attacks.
Google Patches Pixel Modem Flaw Amid Signs of Limited Targeted Exploitation
info@thehackernews.com (The Hacker News) 2026.09.16 97% relevant
This article appears to cover the same underlying event: Google patching the actively exploited Pixel modem flaw CVE-2026-58704, adding that exploitation appears limited and targeted.
Google fixes actively exploited Android zero-day on Pixel devices
Sergiu Gatlan 2026.09.16 100% relevant
This article establishes a new tracked story around CVE-2026-58704, an actively exploited Pixel-specific zero-day fixed by Google in the September 2026 device update.
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