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Stay updated on the latest backdoor threats in cybersecurity. Discover news, analysis, and insights on covert access vulnerabilities.

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Background for this topic.

A backdoor is a hidden method within software or hardware that allows bypassing normal authentication to access a system or network. These can be intentionally created by developers for maintenance or debugging but are frequently exploited or implanted by attackers to maintain unauthorized, persistent access. Backdoors often appear as undocumented commands, hidden user accounts, or covert network services designed to evade detection.

In cybersecurity, backdoors enable attackers to circumvent security controls, increasing the risk of prolonged system compromise and data exposure. Detecting backdoors requires careful code review, monitoring for unusual system behavior, and verifying integrity through trusted baselines. Identifying backdoor indicators in malware or attacker infrastructure is critical for limiting unauthorized access and reducing attacker dwell time within networks. Defensive measures focus on eliminating hidden access points and strengthening authentication mechanisms.

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Researchers found China’s Daxin rootkit and a new Stupig backdoor on a Taiwan firm’s network, suggesting a stealthy intrusion dating back to 2013. Symantec’s Threat Hunter Team found Daxin running on a compromised host at a Taiwan-based subsidiary of a multinational high-tech manufacturer in 2026. Daxin is a Windows kernel-mode rootkit that Symantec first documented […]

Security Affairs 19 Jul 2026, 2:01 a.m. Antivirus Backdoor China Compromise Malware Microsoft Research Rootkit Symantec Taiwan

Microsoft uncovered GigaWiper, a modular Go backdoor combining three malware families with espionage, remote control, and destructive wiping features. In October 2025, Microsoft’s threat intelligence team identified destructive wiping activity inside compromised environments and traced it to a previously unknown piece of malware they’re now calling GigaWiper. The malicious code is written in Go, it […]

Security Affairs 10 Jul 2026, 8:25 p.m. Incident · 6 stories Backdoor Compromise Malicious Code Malware Microsoft

CERT/CC warns an unpatched backdoor in several Tenda routers lets attackers bypass login and gain full admin access with a hidden password. CERT/CC published an alert documenting an undocumented authentication backdoor in multiple Tenda firmware versions, tracked as CVE-2026-11405. The flaw gives anyone who knows the right password full administrative access to the device’s web […]

Security Affairs 7 Jul 2026, 9:45 p.m. Incident · 5 stories CVE-2026-11405 Authentication Backdoor Bypass CVE Firmware Flaw Patch Routers Warning

Chinese-speaking APT CL-STA-1062 targeted Southeast Asian government and energy networks open-source tools, and a new TinyRCT backdoor. Palo Alto Networks Unit 42 researchers published a detailed report on a Chinese-speaking threat actor, tracked as CL-STA-1062, that has been running persistent operations across East Asia since at least March 2022 and shifted focus to Southeast Asian […]

Security Affairs 27 Jun 2026, 5:16 a.m. Incident · 6 stories Advanced Persistent Threat Backdoor China Critical Infrastructure Government Malware Open Source Palo Alto Networks Report Research Threat Actor

DragonForce hid for months by routing malware traffic through Microsoft Teams infrastructure, masking C2 activity and evading network detection. DragonForce ransomware operators hit a major U.S. services firm and stayed hidden for one to two months by routing their command-and-control traffic through Microsoft’s own Teams relay servers. Symantec’s threat hunters tracked the custom backdoor they […]

Security Affairs 18 Jun 2026, 3:55 a.m. Incident · 5 stories America Antivirus Backdoor Command and Control Malware Microsoft Ransomware Symantec

China-linked FishMonger used two SprySOCKS Windows variants that leveraged kernel drivers and the Print Spooler to target governments in four countries. ESET researchers have found two previously undocumented Windows versions of SprySOCKS, a backdoor that the security community had until now treated as Linux-only. Trend Micro first documented the Linux variant in September 2023 and […]

Security Affairs 17 Jun 2026, 8:10 p.m. Incident · 6 stories Antivirus Backdoor China Linux Microsoft Research Trend Micro