Loading vulnerability…
CVE-2025-6543 is a critical memory overflow vulnerability in Citrix NetScaler ADC and NetScaler Gateway. The flaw affects appliances configured as a Gateway, including VPN virtual server, ICA Proxy, CVPN, and RDP Proxy deployments, or as an AAA virtual server. Successful exploitation can trigger unintended control flow and cause denial of service. Reported affected versions include NetScaler ADC and NetScaler Gateway 14.1 before 14.1-47.46, 13.1 before 13.1-59.19, and NetScaler ADC 13.1-FIPS/NDcPP before 13.1-37.236-FIPS/NDcPP. Secure Private Access on-prem and hybrid deployments using affected NetScaler instances are also impacted. Public reporting and vendor statements indicate the vulnerability has been exploited in the wild, including as a zero-day prior to patch availability.
Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No valid public exploits. Mallory filtered out 3 candidates as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
246 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A NetScaler vulnerability that the content says has come under active exploitation in the wild.
A previously disclosed NetScaler vulnerability referenced as having been repeatedly exploited by threat actors.
A previously disclosed NetScaler vulnerability referenced as having been repeatedly exploited by threat actors.
A critical NetScaler ADC memory overflow vulnerability (referred to as 'Citrix Bleed 2') that can be exploited in the wild and may enable unintended control flow/DoS; patched by Citrix.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.