Lead · Vulnerabilities
PHP2Shell is on KEV with a Thursday deadline, and every confirmed shell so far landed in a honeypot
CISA says actively exploited; the only published success is 35 shells from two addresses against machines built to be broken into, and that distinction is your Wednesday.
Two use-after-free flaws in the PHP engine's session.upload_progress handling, CVE-2026-109618 and CVE-2026-109619, both rated 9.2, both triggering during multipart request processing, collectively marketed as PHP2Shell. On Monday CISA confirmed active exploitation, added them to the Known Exploited Vulnerabilities catalogue, and ordered federal agencies to patch by Thursday. That is the headline, and the headline is true.
The underneath is more interesting. SecurityWeek reports the move from probes to working shells as 35 shells launched from two IP addresses on 24 October, against honeypots. Wiz, which has been watching since public disclosure on 21 October, reports exploitation attempts and no successful compromise observed. An OTX pulse, 31 hours behind the first news report, puts it rather more briskly: UNC actors leveraging public exploit code against public, business and educational infrastructure. Nobody here is lying. Three people are describing the same tide from three different beaches, and only one of them has a camera.
What this means in a room with a patch window in it: the exploit works, reliably, from public code, which is the only part of the question you actually need answered. Siemens, Schneider Electric and ABB have already confirmed that some of their products are affected, which is the industrial sector's traditional way of telling you this will take months. CISA has set Thursday. The tide sets Friday, and it is always Friday.
Why it mattersIf you run PHP anywhere a stranger can post a multipart request, you are in scope today, and the clock is federal.
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