Cyber Brief

Cyber Brief · Jun 27 · 12 stories

Saturday, June 27, 2026 · sent to 1 subscribers

News · The Hacker News · Jun 26

CISA Adds Exploited PTC Windchill RCE Flaw to KEV as Web Shell Attacks Continue

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Thursday added a critical remote code execution vulnerability impacting PTC Windchill PDMlink and PTC FlexPLM enterprise Product Data Management (PDM) and Product Lifecycle Management (PLM) software to its Known Exploited Vulnerabi…

News · The Hacker News · Jun 26

New DirtyClone Linux Kernel Flaw Lets Local Users Gain Root via Cloned Packets

DirtyClone is a new Linux kernel privilege escalation in the DirtyFrag family. JFrog Security Research published a working exploit walkthrough for the flaw on June 25, the first public demonstration for this variant. Tracked as CVE-2026-43503 (CVSS 8.8), it lets a local user co…

News · The Hacker News · Jun 27

Ukraine Says Russian Intelligence Used Fake Support Texts to Steal Messaging Credentials

The Security Service of Ukraine (SSU) said it, together with the U.S. Federal Bureau of Investigation (FBI), uncovered a long-running campaign orchestrated by Russian intelligence services to break into the messaging accounts of government officials, military personnel, politicians, and activists i…

News · BleepingComputer · Jun 26

CISA sets urgent deadline to fix Cisco flaw exploited in attacks

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) is giving federal agencies until Sunday to patch a vulnerability in Cisco Unified Communications Manager Server that is being actively exploited. [...]

News · The Hacker News · Jun 26

Chinese-Speaking APT Deploys New TinyRCT Backdoor in Southeast Asia Campaign

A Chinese-speaking advanced persistent threat (APT) actor has been linked to a new custom backdoor called TinyRCT as part of cyber attacks aimed at government entities and critical infrastructure in Southeast Asia. The activity, particularly aimed at state-owned enterprises in the energy and gover…

News · The Hacker News · Jun 26

Amazon Q Developer Flaw Could Let Malicious Repos Run Code via MCP Configs

A high-severity flaw in Amazon Q Developer let a malicious repository run commands and steal a developer's cloud credentials. The path was short: a developer opens the repo, trusts the workspace, and Amazon Q does the rest. Amazon has patched it. Tracked as CVE-2026-12957 (CVSS 8.5), the…

News · CSO Online · Jun 26

Hackers exploit critical PTC Windchill PLM software flaw

Hackers are exploiting a critical vulnerability recently patched in PTC Windchill and FlexPLM, two product lifecycle management solutions used by organizations across a range of industries, including defense, aerospace, automotive, medical, electronics, industrial machinery, and consumer goods. …

News · BleepingComputer · Jun 27

Clean GitHub repo tricks AI coding agents into running malware

An agentic coding tool tasked with cloning and setting up a seemingly benign GitHub repository could execute a malicious payload that remains invisible to security scanners, AI agents, and human reviewers. [...]

News · The Hacker News · Jun 27

OpenAI Previews GPT-5.6 Sol With Restricted Access and Stronger Cyber Safeguards

OpenAI on Friday released three versions of GPT-5.6, called Sol, Terra, and Luna, as a limited preview to a small number of companies as part of an ongoing engagement with the U.S. government. While Sol is the latest flagship model and the most powerful, Terra strikes a balance between efficiency …

News · The Hacker News · Jun 26

New Linux pedit COW Exploit Enables Root Access by Poisoning Cached Binaries

A flaw in the Linux kernel's traffic-control subsystem can let a local unprivileged user gain root on affected systems. CVE-2026-46331, nicknamed "pedit COW," is an out-of-bounds write in the packet-editing action (act_pedit) that corrupts shared page-cache memory. A public, working exploit&n…

News · BleepingComputer · Jun 26

FBI: Russian hackers now target Signal backup recovery keys

The FBI and CISA are warning that a phishing campaign targeting Signal users tied to Russian intelligence services has evolved to steal Signal Backup Recovery Keys, allowing attackers to access victims' historical messages. [...]

News · The Hacker News · Jun 26

FBI Warns Russian Intelligence Hackers Target Signal Backup Recovery Keys

The FBI and CISA have updated their March warning about Russian intelligence phishing Signal accounts, and the operators have added a step: they now coax targets into handing over their Signal Backup Recovery Key. Hand it over once, and the attacker can restore the account's backup, read…