Severity: HighAction: Review

Two critical RCEs in PHP core

Cisco Talos is tracking the disclosure of two unauthenticated remote code execution (RCE) flaws in PHP core, dubbed “php2shell”, triggered by a plain HTTP request and exploitable before any application code runs, affecting every PHP build since 5.4. Based on the entities involved in the disclosure, artificial…

Excerpt from the primary source: Cisco Talos Intelligence

Who is affected

Enterprises · Security professionals

Affected technology: Cisco networking & security

What you should do · Review

Review whether your organization uses Cisco networking & security and assess exposure using the linked advisories.

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.

Security research

Two critical RCEs in PHP core Cisco Talos Intelligence · blog.talosintelligence.com · Oct 21, 2026 · Primary source
Severity: Informational

Parasitizing trust: How legitimate infrastructure becomes a delivery pipeline for attackers

Adversaries are turning the tools businesses trust into delivery mechanisms for malicious activity. Cisco Talos observed abuse of more than 25 legitimate platforms over the past year, exploiting the built-in trust of collaboration, file-sharing, payment and other services to reach their targets.

Severity: HighAction: ReviewExploitation: Suspected

BeyondTrust Remote Support Zero-Day Continues Trend of Exploited Edge Bugs

Ivanti, Cisco, and Palo Alto Networks all had vulnerabilities in edge devices come under fire this week. Now BeyondTrust joins the group.

Why it matters

There are signs this may already be exploited, which usually shortens the time available to patch.

Severity: CriticalAction: Act nowExploitation: Exploited

Cisco patches new Secure Email Gateway zero-day exploited in attacks

Cisco has patched another actively exploited zero-day flaw in its Secure Email Gateway (SEG) that lets remote unauthenticated attackers execute commands with root privileges.

Why it matters

Source reporting says attackers are already exploiting this, so exposed Cisco networking & security systems are at immediate risk.

Act now

Treat this as an emergency.

Severity: CriticalAction: Act nowExploitation: ExploitedCISA KEV

Ahsay AhsayCBS Command Injection Vulnerability (CVE-2026-105134) is being actively exploited, CISA warns

CISA added CVE-2026-105134 (Ahsay AhsayCBS) to its Known Exploited Vulnerabilities catalog on October 14, 2026, which means there is reliable evidence of exploitation in the wild. Ahsay AhsayCBS contains a command injection vulnerability that could allow a remote attacker to execute operating system commands via manipulation of the random parameter in the Replication Receiver component’s…

Why it matters

CISA lists this as exploited in the wild. Unpatched AhsayCBS and Cisco networking & security systems are exposed to active attacks now.

Act now

Treat this as an emergency.