Severity: CriticalAction: Act nowExploitation: Widespread

PHP2Shell: Mass Exploitation Looms for Leaked Critical PHP Flaws

Tracked as CVE-2026-109618 and CVE-2026-109619, the bugs could potentially lead to unauthenticated remote code execution.

Excerpt from the primary source: SecurityWeek

Who is affected

Security professionals

Why it matters

Attackers are exploiting this at scale, so exposed affected systems are likely to be targeted quickly.

Automated: stated only from CISA listings and the exploitation evidence in the sources below.

What you should do · Act now

Treat this as an emergency. Identify every system running the affected products, apply the vendor's fix or published mitigations immediately, and check for signs of compromise. Patching alone does not remove an attacker who already got in.

Automated guidance based on this story's classification. Check the linked advisories for specifics.

Sources

We link to original and authoritative sources. Headlines and excerpts belong to their publishers.

Original reporting

PHP2Shell: Mass Exploitation Looms for Leaked Critical PHP Flaws SecurityWeek · securityweek.com · Oct 21, 2026 · Primary source
Severity: ElevatedAction: Patch

PHP warns admins of two critical flaws, emergency patches coming tomorrow

The PHP security team is warning administrators to prepare for emergency security updates tomorrow to address two critical vulnerabilities, as information about the flaws has reportedly leaked ahead of their scheduled disclosure.

Severity: ElevatedAction: Be aware

There's only so much code: the rise in vulnerability numbers

The September Microsoft Tuesday release included 975 vulnerability advisories. This month, 1,415 vulnerabilities were just dropped. Compared to a pre-June average of 100 a month, that increase is staggering. Where did they come from? And what does the future look like?

Severity: HighAction: PatchExploitation: ExploitedCISA KEV

Plex Media Server External Control of File Name or Path Vulnerability (CVE-2026-96656) is being actively exploited, CISA warns

CISA added CVE-2026-96656 (Plex Media Server) to its Known Exploited Vulnerabilities catalog on October 20, 2026, which means there is reliable evidence of exploitation in the wild. Plex Media Server contains an external control of file name or path vulnerability which can allow an admin user to write arbitrary files that may be executed on load. This vulnerability can be chained with CVE-2026-96652, CVE-2026-96654…

Why it matters

CISA lists this as exploited in the wild. Unpatched Media Server systems are exposed to active attacks now.

Patch

Apply the vendor's security update for Media Server.