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HomeBlogVulnerability
Vulnerability

Vulnerability Articles & Guides

3 articles on Vulnerability — practical guides, tutorials, and technical explainers from TechSystem Lab.

CybersecurityLinuxKernelVulnerability

CVE-2026-43499: Linux Kernel rtmutex Flaw Enables Local Privilege Escalation — Patch Now

CVE-2026-43499 is a CVSS 7.8 high-severity flaw in the Linux kernel's real-time mutex (rtmutex) implementation. Learn how the remove_waiter() bug works, which Ubuntu releases are affected, and how to patch your kernel.

July 22, 20265 min read
CybersecurityNetworkingCiscoVulnerability

Cisco SD-WAN Manager CVE-2026-20128 & CVE-2026-20122 Under Active Exploitation — Patch Immediately

Cisco confirms active exploitation of two more Catalyst SD-WAN Manager vulnerabilities. CVE-2026-20122 allows arbitrary file overwrite via API, CVE-2026-20128 leaks DCA credentials. Here's the full breakdown, exploit chain, and remediation steps.

March 6, 20268 min read
CybersecurityNetworkingCiscoVulnerability

CVE-2026-20127: Critical Cisco SD-WAN Zero-Day Exploited Since 2023 — What You Need to Do Now

CISA has issued Emergency Directive 26-03 for CVE-2026-20127, a CVSS 10.0 authentication bypass in Cisco Catalyst SD-WAN. Learn the vulnerability details, detection steps, and immediate remediation actions.

February 26, 20268 min read
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