Palo Alto Networks · Memory corruption
PHP Memory Corruption Vulnerability
At a glance
Actively exploited in the wild — prioritise confirming exposure.
High rather than Critical: exposure is scored at a default because we cannot see your systems or suppliers. If you run or depend on Palo Alto Networks PAN-OS, treat it as Critical.
Briefing
There is no written leader briefing for this story yet. These questions come from the facts we hold.
Questions to ask IT
- Do we run Palo Alto Networks PAN-OS and PHP Group PHP, and which versions?
- Is any of it reachable from the internet?
- Have we checked whether it has already been used against us?
- If it is still not patched, what mitigation is in place, and what is holding the fix up?
Next steps
- Confirm exposure and remediation status for affected products
Vulnerability facts
Full CVE detail CVE-2026-109618- 9.2 · CriticalExploitable over the network without any account, under specific conditions, and no one has to click or open anything. High impact on confidentiality, integrity and availability.CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- Listed: attacks using it have been seen (on the catalogue since )
- Elevated attack likelihood (~100% in 30 days)
These facts are for CVE-2026-109618. This event covers 1 more CVE, each with its own record.
No technical write-up beyond these facts and the summary below yet.
Next steps
- Confirm whether affected products/versions are present and prioritise patching or mitigations
Summary
- CISA has added two new vulnerabilities to its known-exploited catalogue and updated the
- CVE-2026-109618 is confirmed as exploited in the wild (US known-exploited catalogue)
- CVE-2026-109618 has an estimated ~100% chance of attack in 30 days (100th percentile) as of 2026-11-02 — probability signal, not confirmed exploitation
- Authoritative catalogues report active exploitation of this vulnerability.
Products and services involved
- Palo Alto Networks PAN-OS93% match confidence · CVE-2026-109618
- PHP Group PHP88% match confidence · CVE-2026-109618
Same event, different frames
Distinct often headline the same incident differently.
Pulse
Last checked yesterday · Recheck overdue since 8 Nov 2026, 10:10 UK time
Linked reporting from CISA Cybersecurity Advisories (official authority).
Review the new source against your estate and the next steps in the briefing.
Read source (CISA Cybersecurity Advisories)2 quiet checks hidden.
Sources
- SecurityWeekNews
PHP2Shell: Mass Exploitation Looms for Leaked Critical PHP Flaws
- BleepingComputerNews
PHP ships emergency patches for critical PHP2Shell flaws
Threat Brief: Critical Vulnerabilities in PHP: CVE-2026-109618, CVE-2026-109619
- CISA Cybersecurity AdvisoriesOfficial
Critical Vulnerabilities in PHP Require Immediate Patching
CVE-2026-109618 and CVE-2026-109619: Critical Unauthenticated Remote Code Execution in PHP
- BleepingComputerNews
PHP2Shell security flaws now sucessfully exploited in the wild
PHP Memory Corruption Vulnerability
- ESET WeLiveSecurityResearcher
PHP2Shell: What to know about two critical PHP flaws
- CISA Cybersecurity AdvisoriesOfficial
CISA Adds Two Known Exploited Vulnerabilities to Catalog
How we know
Statements extracted from sources. Higher confidence means stronger corroboration.
- ClaimedHeadline60% confidence
PHP Memory Corruption Vulnerability
- ProbableSummary fact75% confidence
CISA has added two new vulnerabilities to its known-exploited catalogue and updated the
- ConfirmedCVE identifier95% confidence
Event involves CVE-2026-109618
- ConfirmedKnown-exploited catalogue98% confidence
CVE-2026-109618 is confirmed as exploited in the wild (US known-exploited catalogue)
- ConfirmedEstimated attack likelihood95% confidence
CVE-2026-109618 has an estimated ~100% chance of attack in 30 days (100th percentile) as of 2026-11-02 — probability signal, not confirmed exploitation
- ConfirmedCVE identifier95% confidence
Event involves CVE-2026-109619
- ConfirmedKnown-exploited catalogue98% confidence
CVE-2026-109619 is confirmed as exploited in the wild (US known-exploited catalogue)
- ConfirmedEstimated attack likelihood95% confidence
CVE-2026-109619 has an estimated ~100% chance of attack in 30 days (100th percentile) as of 2026-11-02 — probability signal, not confirmed exploitation

