Latest cybersecurity reporting from selected sources.

Full scale of infections remains 'unknown' China-linked attackers exploited a maximum-severity hardcoded-credential bug in Dell RecoverPoint for Virtual Machines as a zero-day since at least mid-2024. It's all part of a long-running effort to backdoor infected machines for long-term access, according to Google's Mandiant incident response team.…

A critical security issue in a popular endpoint manager (CVE-2025-61932) allowed Chinese state-sponsored attackers to backdoor Japanese businesses.

Microsoft said it has revamped the Internet Explorer (IE) mode in its Edge browser after receiving "credible reports" in August 2025 that unknown threat actors were abusing the backward compatibility feature to gain unauthorized access to users' devices

The hackers are likely trying to collect data to feed the development of zero-day exploits, said Google researchers

Attackers are wielding the sophisticated modular malware while exploiting CVE-2025-29824, a previously zero-day flaw in Windows Common Log File System (CLFS) that allows attackers to gain system-level privileges on compromised systems.

Malware isn’t just trying to hide anymore—it’s trying to belong. We’re seeing code that talks like us, logs like us, even documents itself like a helpful teammate. Some threats now look more like developer tools than exploits. Others borrow trust from open-source platforms, or quietly build themselves out of AI-written snippets. It’s not just about being malicious—it’s about being believable.

A threat actor with likely links to the Abyss ransomware group is leveraging an apparent zero-day vulnerability to deploy the "Overstep" backdoor on fully up-to-date appliances.

A now-patched security flaw in Google Chrome was exploited as a zero-day by a threat actor known as TaxOff to deploy a backdoor codenamed Trinper

Also: Infostealer Malware Compromises Mexican Government ComputersThis week, DeepSeek exposed sensitive data, hackers exploited unpatched Zyxel flaws, infostealer malware on Mexican government computers, Smiths Group incident, PowerSchool breach notifications, an Apple zero-day, XWorm RAT backdoor, and Credit Control Corporation settled a lawsuit.

Defenders running the Cleo managed file transfer are urged to be on the lookout for the Cleopatra backdoor and other indicators of an ongoing ransomware campaign, as patching details remain foggy, and no CVE has been issued.

The Russia-aligned threat actor known as RomCom has been linked to the zero-day exploitation of two security flaws, one in Mozilla Firefox and the other in Microsoft Windows, as part of attacks designed to deliver the eponymous backdoor on victim systems

The North Korean threat actor known as Lazarus Group has been attributed to the zero-day exploitation of a now-patched security flaw in Google Chrome to seize control of infected devices

The South Korea-aligned cyberespionage group APT-C-60 has been leveraging a zero-day code execution vulnerability in the Windows version of WPS Office to install the SpyGlace backdoor on East Asian targets. [...]

A South Korea-aligned cyber espionage has been linked to the zero-day exploitation of a now-patched critical remote code execution flaw in Kingsoft WPS Office to deploy a bespoke backdoor dubbed SpyGlace

Also: Turla Targets European Missions and Google Patches Chrome Zero-DaysThis week, hackers used a Linus backdoor and a Microsoft client management tool; Santander Bank, the Helsinki Education Division, an Australian energy provider and auction house Christie's were breached; hackers targeted European missions in the Middle East; and Google patched a zero-day flaw.

A sophisticated threat actor is leveraging the bug to deploy a Python backdoor for stealing data and executing other malicious actions.

Palo Alto Networks has started releasing hotfixes for a zero-day vulnerability that has been actively exploited since March 26th to backdoor PAN-OS firewalls. [...]

Suspected state-sponsored hackers have been exploiting a zero-day vulnerability in Palo Alto Networks firewalls tracked as CVE-2024-3400 since March 26, using the compromised devices to breach internal networks, steal data and credentials. [...]

Threat actors have been exploiting the newly disclosed zero-day flaw in Palo Alto Networks PAN-OS software dating back to March 26, 2024, nearly three weeks before it came to light yesterday

Out of the PAN-OS and into the firewall, a Python backdoor this way comes Palo Alto Networks on Friday issued a critical alert for an under-attack vulnerability in the PAN-OS software used in its firewall-slash-VPN products.…