backdoor
China-linked hackers exploited Dell zero-day since 2024 (CVE-2026-22769)
A suspected China-linked cyberespionage group has been covertly exploiting a critical zero-day flaw (CVE-2026-22769) in Dell’s RecoverPoint for Virtual Machines software since …
Firmware-level Android backdoor found on tablets from multiple manufacturers
A new Android backdoor embedded directly in device firmware can quietly take control of apps and harvest data, Kaspersky researchers found. The malware, named Keenadu, was …
Cisco fixes AsyncOS vulnerability exploited in zero-day attacks (CVE-2025-20393)
Cisco has finally shipped security updates for its Email Security Gateway and Secure Email and Web Manager devices, which fix CVE-2025-20393, a vulnerability in the …
Cisco email security appliances rooted and backdoored via still unpatched zero-day
A suspected Chinese-nexus threat group has been compromising Cisco email security devices and planting backdoors and log-purging tools on them since at least late November …
MuddyWater cyber campaign adds new backdoors in latest wave of attacks
ESET researchers say an Iran aligned threat group is refining its playbook again, and the latest activity shows how much its tactics have shifted. MuddyWater is a long running …
Cisco ASA zero-day vulnerabilities exploited in sophisticated attacks
A widespread campaign aimed at breaching organizations via zero-day vulnerabilities in Cisco Adaptive Security Appliances (ASA) has been revealed by the US, UK, Canadian and …
Attackers use “Contact Us” forms and fake NDAs to phish industrial manufacturing firms
A recently uncovered phishing campaign – carefully designed to bypass security defenses and avoid detection by its intended victims – is targeting firms in …
NetScaler ADC/Gateway zero-day exploited by attackers (CVE-2025-7775) – updated!
Three new vulnerabilities affecting (Citrix) NetScaler application delivery controller (ADC) and Gateway devices have been made public, one of which (CVE-2025-7775) has been …
WinRAR zero-day was exploited by two threat actors (CVE-2025-8088)
The RomCom attackers aren’t the only ones that have been leveraging the newly unveiled WinRAR vulnerability (CVE-2025-8088) in zero-day attacks: according to Russian …
WinRAR zero-day exploited by RomCom hackers in targeted attacks
ESET researchers have discovered a previously unknown vulnerability in WinRAR, exploited in the wild by Russia-aligned group RomCom. If you use WinRAR or related components …
SonicWall SMA devices persistently infected with stealthy OVERSTEP backdoor and rootkit
Unknown intruders are targeting fully patched end-of-life SonicWall Secure Mobile Access (SMA) 100 series appliances and deploying a novel, persistent backdoor / rootkit, …
Stealthy backdoor found hiding in SOHO devices running Linux
SecurityScorecard’s STRIKE team has uncovered a network of compromised small office and home office (SOHO) devices they’re calling LapDogs. The threat is part of a broader …