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.

Excerpt from the primary source: Cisco Talos Intelligence

Who is affected

Enterprises · Security professionals

Affected technology: Cisco networking & security

What you should do

No specific action is required at this time.

Sources

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

Security research

Parasitizing trust: How legitimate infrastructure becomes a delivery pipeline for attackers Cisco Talos Intelligence · blog.talosintelligence.com · Oct 21, 2026 · Primary source
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.

Severity: CriticalAction: Act nowExploitation: ExploitedCISA KEV

Cisco Secure Email Gateway Relative Path Traversal Vulnerability (CVE-2026-76519) is being actively exploited, CISA warns

CISA added CVE-2026-76519 (Cisco Secure Email Gateway) to its Known Exploited Vulnerabilities catalog on October 14, 2026, which means there is reliable evidence of exploitation in the wild. Cisco Secure Email Gateway contains a relative path traversal vulnerability that could allow an unauthenticated, remote attacker to write arbitrary files on the underlying operating system.

Why it matters

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

Act now

Treat this as an emergency.

Parasitizing trust: How legitimate infrastructure becomes a delivery pipeline for attackers | CybersecurityNews.us