Chinese-speaking individuals are the target of a new campaign that uses a trojanized version of SumatraPDF reader to deploy the AdaptixC2 Beacon post-exploitation agent and ultimately facilitate the abuse of Microsoft Visual Studio Code (VS Code) tunnels for remote access. Zscaler ThreatLabz, which discovered the campaign last month, has attributed it with high confidence to…
Tag: Reader
Exploits, Global Security News
Adobe rolls out emergency fix for Acrobat, Reader zero-day flaw
Adobe has released an emergency security update for Acrobat Reader to fix a vulnerability, tracked as CVE-2026-34621, that has been exploited in zero-day attacks since at least December. […]
Apps, Exploits, Global Security News
Adobe issues emergency fix for Acrobat Reader flaw exploited in the wild (CVE-2026-34621)
Adobe has pushed out an emergency security update for Adobe Acrobat Reader, patching a zero-day vulnerability (CVE-2026-34621) exploited in the wild since November 2025. About CVE-2026-34621 CVE-2026-34621 is a critical prototype pollution vulnerability – a type of vulnerability that occurs in JavaScript and allows attackers to add or modify an application’s JavaScript objects and properties.…
AI, Apps, Exploits, Global Security News, Risk Management
Adobe fixes actively exploited Acrobat Reader flaw CVE-2026-34621
Adobe addressed a critical Acrobat Reader vulnerability, tracked as CVE-2026-34621, which is actively exploited to run malicious code. Adobe released emergency updates to address a critical vulnerability, tracked as CVE-2026-34621 (CVSS score of 8.6), in Adobe Acrobat Reader, which is being actively exploited. The flaw could allow attackers to execute malicious code on affected systems,…
Exploits, Global Security News
Adobe Patches Actively Exploited Acrobat Reader Flaw CVE-2026-34621
Adobe has released emergency updates to fix a critical security flaw in Acrobat Reader that has come under active exploitation in the wild. The vulnerability, assigned the CVE identifier CVE-2026-34621, carries a CVSS score of 8.6 out of 10.0. Successful exploitation of the flaw could allow an attacker to run malicious code on affected installations. It has been described…
AI, Apps, Cloud Security, Cybersecurity, Data Breaches, Exploits, Global Security News, malware, Network Security, privacy, Risk Management
Zero-Days, Data Breaches, and AI Risks Define This Week’s Cybersecurity Landscape in 2026
Major Threats & Vulnerabilities Zero-Day and Critical Exploits A new zero-day vulnerability in Adobe Acrobat Reader is being actively exploited through malicious PDFs. Attackers can steal data and compromise systems, with no patch currently available. Security teams are urged to block untrusted PDFs, disable JavaScript, and use sandboxing with outbound traffic monitoring. The Fortinet EMS…
AI, Exploits, Global Security News, malware, Risk Management
Hackers have been exploiting an unpatched Adobe Reader vulnerability for months
Adobe Reader vulnerabilities have been exploited for decades by threat actors taking advantage of the universal use of the utility to fool employees into downloading infected PDF documents through phishing lures. Now a security researcher says a Reader hole has been quietly exploited by malware for as long as four months, fingerprinting computers to gather…
AI, Cybersecurity, Exploits, Global Security News, Russia
Malicious PDF reveals active Adobe Reader zero-day in the wild
Hackers used an Adobe Reader zero-day for months. Researcher Haifei Li found a malicious PDF and asks the community to help analyze it. Hackers used an Adobe Reader zero-day for months to deliver a sophisticated PDF exploit. Cybersecurity researcher Haifei Li, founder of Expmon, discovered the malicious file and warned the community. On March 26,…
AI, Exploits, Global Security News
Adobe Reader Zero-Day Exploited to Steal Data via Malicious PDFs
A Adobe Reader zero-day is being exploited via malicious PDFs since 2025 where hackers steal data without user interaction, no patch available yet.
AI, Apps, Data Breaches, Endpoint, Exploits, Global Security News, Network Security, Risk Management, Russia
Adobe Acrobat Reader Zero Day Exploited in Active PDF Attacks
Attackers have been exploiting a zero-day vulnerability in Adobe Acrobat Reader for months, using malicious PDF files to silently steal data and potentially take over victim systems. Active since at least Dec. 2025, the campaign highlights how a seemingly routine document can serve as an effective entry point for system compromise. This exploit “allows the…
AI, Cybersecurity, Exploits, Global Security News
Acrobat Reader zero-day exploited in the wild for many months
Unknown attackers have exploited a zero-day Adobe Acrobat Reader vulnerability since November 2025 and possibly even earlier, security researcher Haifei Li has discovered. PDF files carry the exploit Haifei Li is one of the creators of EXPMON, a sandbox-based cybersecurity system for detecting advanced file-based exploits. It does so by analyzing suspicious files submitted through…
Exploits, Global Security News
Hackers exploiting Acrobat Reader zero-day flaw since December
Attackers have been exploiting a zero-day vulnerability in Adobe Reader using maliciously crafted PDF documents since at least December. […]
Global Security News
Adobe Reader zero-day vulnerability in active exploitation
Categories: Threat Research Tags: advisory, vulnerability, Adobe Reader