CVE-2025-7775

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 2025, Cisco Talos researchers have shared. “Our analysis indicates that appliances with non-standard configurations (…) are what we have observed as being compromised by the attack,” they noted. According to the accompanying advisory, the attackers exploited CVE-2025-20393, an AsyncOS vulnerability stemming from improper input validation, to execute arbitrary commands with … More →

Enterprises have long relied on firewalls, routers, VPN servers, and email gateways to protect their networks from attacks. Increasingly, however, these network edge devices are becoming security liabilities themselves. Every few weeks, another crisis plays out: Security teams scramble to patch and scan their network appliances for malware implants after another zero-day attack is newly […]

Threat actors abuse HexStrike AI, a new offensive security tool meant for red teaming and bug bounties, to exploit fresh vulnerabilities. Check Point researchers warn that threat actors are abusing AI-based offensive security tool HexStrike AI to quickly exploit recently disclosed security flaws. HexStrike AI combines professional security tools with autonomous AI agents to deliver comprehensive security testing capabilities. […]

For the latest discoveries in cyber research for the week of 1st September, please download our Threat Intelligence Bulletin. TOP ATTACKS AND BREACHES American consumer credit reporting agency TransUnion has suffered a data breach that resulted in the exposure of sensitive personal information for over 4.4 million individuals in the United States. The leaked data […]

Here’s an overview of some of last week’s most interesting news, articles, interviews and videos: 300k+ Plex Media Server instances still vulnerable to attack via CVE-2025-34158 Over 300,000 internet-facing Plex Media Server instances are still vulnerable to attack via CVE-2025-34158, a critical vulnerability for which Plex has issued a fix for earlier this month, Censys has warned. Git vulnerability leading to RCE is being exploited by attackers (CVE-2025-48384) CVE-2025-48384, a recently patched vulnerability in the … More →

A new round of the weekly Security Affairs newsletter has arrived! Every week, the best security articles from Security Affairs are free in your email box. Enjoy a new round of the weekly SecurityAffairs newsletter, including the international press. Lab Dookhtegan hacking group disrupts communications on dozens of Iranian ships New zero-click exploit allegedly used […]

Citrix NetScaler ADC and NetScaler Gateway customers have been hit by a new round of zero day vulnerabilities that require urgent patching, including one the company warned is being actively exploited. That exploitation alert makes the highest priority flaw, CVE-2025-7775, the one admins will want to start with. According to Citrix’s advisory, it’s a memory […]

Over 28,200 Citrix NetScaler ADC/Gateway instances remain exposed to critical RCE flaw CVE-2025-7775, already under active exploitation. Experts at the Shadowserver Foundation warn that more than 28,200 Citrix instances are vulnerable to the vulnerability CVE-2025-7775, which is under active exploitation. CVE-2025-7775 (CVSS score: 9.2) is a memory overflow vulnerability leading to Remote Code Execution and/or Denial-of-Service. […]

U.S. Cybersecurity and Infrastructure Security Agency (CISA) adds Citrix NetScaler flaw to its Known Exploited Vulnerabilities catalog. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) added Citrix NetScaler flaw, tracked as CVE-2025-7775, to its Known Exploited Vulnerabilities (KEV) catalog. This week, Citrix addressed three security flaws (CVE-2025-7775, CVE-2025-7776, CVE-2025-8424) in NetScaler ADC and NetScaler Gateway, including one (CVE-2025-7775) that it […]

Zero-day exploited in the wild forces Citrix and CISA to push emergency patch deadlines for federal agencies.

Citrix addressed three vulnerabilities in NetScaler ADC and NetScaler Gateway, including one that has been actively exploited in the wild. Citrix addressed three security flaws (CVE-2025-7775, CVE-2025-7776, CVE-2025-8424) in NetScaler ADC and NetScaler Gateway, including one (CVE-2025-7775) that it said has been actively exploited in the wild. “Exploits of CVE-2025-7775 on unmitigated appliances have been observed.” […]

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 targeted in zero-day attacks. “Exploits of CVE-2025-7775 on unmitigated appliances have been observed,” Citrix has confirmed, and released security updates that fix the flaws. The vulnerabilities The three fixed vulnerabilities are: CVE-2025-7775: A memory overflow vulnerability leading to pre-auth remote code execution (RCE) and/or denial of service (DoS) CVE-2025-7776: A memory overflow … More →