Server Vulnerability Monitoring

Server Vulnerability Monitoring
That Knows What's Actually Running

Quick answer
TigerGate continuously monitors Linux servers and cloud VMs for CVEs, missing patches and CIS benchmark drift. Agent or agentless, across AWS, Azure, GCP, Oracle Cloud and on-prem. Every finding is prioritized by CISA KEV, EPSS and runtime use so you patch what attackers actually reach — not every high-CVSS line in the scanner output. Reports fit CERT-In VAPT and PCI-DSS 11.3 evidence.
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Coverage: Every Linux Host, Every Cloud

OS, cloud and on-prem — one scanner, one inventory.

Linux distributions

  • · Debian, Ubuntu, RHEL, CentOS
  • · Rocky, Alma, Oracle Linux
  • · Amazon Linux 2 / 2023, SUSE, Fedora

Cloud VMs

  • · AWS EC2 (snapshot + agent)
  • · Azure VM, GCP GCE
  • · Oracle Cloud Compute

On-prem & edge

  • · Agent for air-gapped Linux
  • · k3s / embedded Linux hosts
  • · Branch VMs and bare metal

How It Scans: Agent or Agentless

Agentless reads cloud snapshots and inventory APIs — nothing installed on the host. Fastest way to onboard a 500-VM AWS account; a scan runs on a schedule and reports the full package and configuration state. Trade-off: it is point-in-time and cannot see runtime process behaviour.

Agent is a small Linux binary (userspace plus optional eBPF) deployed via your existing config management (Ansible, Chef, Puppet, cloud-init, k3s DaemonSet). It streams inventory changes continuously, works on on-prem and air-gapped hosts, and feeds the eBPF runtime signal so we know which CVEs are actually loaded in a running process.

Most teams start agentless on cloud VMs and layer the agent onto crown-jewel hosts and on-prem fleets. Both modes feed the same inventory, the same reports and the same remediation workflow.

Prioritize What's Actually Exploitable

A fresh scan on a mid-sized Linux fleet surfaces thousands of CVEs. Teams typically find 3–7% are both exploitable and reachable. That's the queue worth paging on.

CVSS severity

The theoretical severity score from NVD.

CISA KEV

Known Exploited Vulnerabilities list — attackers are using it right now.

EPSS probability

FIRST.org Exploit Prediction Scoring System — likelihood of exploitation in 30 days.

Exposure

Is the host internet-reachable, in a public subnet, or carrying public IPs?

Runtime use

Is the vulnerable library actually loaded by a running process (eBPF signal)?

Business impact

Tag the asset (prod, pci, cde, dev) and let policy weight it.

Patch Posture, CIS Hardening & Virtual Patching

Beyond CVEs, every host is scored against the CIS benchmark for its distribution — kernel settings, SSH configuration, auditd, filesystem permissions, service hardening. Drift triggers a finding mapped to the specific CIS control.

Patch posture shows the gap between what the host runs today and what the upstream package feed offers. You see mean time to patch, hosts missing kernel updates, and the specific CVEs that would be closed by the pending upgrade.

For critical CVEs with no patch available, eBPF virtual patching can block the exploitation pattern at the kernel boundary until the real fix ships. Every virtual patch has an expiry linked to the pending upstream fix — it is a time-buyer, not a replacement.

Reports for CERT-In VAPT, PCI-DSS 11.3 & SOC 2

Every scan produces audit-ready evidence. CERT-In VAPT-aligned vulnerability reports with discovery date, severity, remediation and closure date — the exact shape Indian regulators expect from empanelled auditors. PCI-DSS 11.3 internal and external scan reports with ASV-style formatting. SOC 2 CC7.1 vulnerability lifecycle evidence maps every finding to a control narrative.

Reports export as PDF or CSV, are retained for the audit window, and can be shared read-only with external auditors. See the full compliance mapping.

Part of the TigerGate Vulnerability Management Hub

Server vulnerability monitoring is one surface in the broader vulnerability management hub. The same console covers application dependencies (SCA/SBOM), container images, cloud posture, Kubernetes, and runtime workloads — all de-duplicated into one inventory with the same prioritization logic.

A single CVE in glibc that shows up on an EC2 host, in a container image, and in a Kubernetes pod running from that image is one record with three locations — not three tickets in three tools.

How It Compares to Tenable, Qualys & Intruder

vs Tenable Vulnerability Management / Nessus

Tenable has the deepest OS and network-scanner coverage in the industry and is the default for large regulated enterprises. It is priced per asset through a sales motion and does not include container, Kubernetes or cloud posture in the base tier. TigerGate matches Tenable's Linux and cloud VM depth, adds eBPF runtime reachability, container and Kubernetes coverage in one price, and is self-serve.

vs Qualys VMDR

Qualys VMDR is a mature agent-based VM platform with strong patching workflows and sprawling module coverage. The agent footprint is heavier than TigerGate's and pricing is enterprise-only. Teams moving to cloud-native stacks often find TigerGate's lighter agent and bundled Kubernetes and runtime coverage closer to how they already work.

vs Intruder

Intruder is self-serve and SMB-friendly for external and basic internal scanning. It is a good fit for a small team with a handful of VMs and no cloud ambition. TigerGate covers the same ground and extends into cloud posture, Kubernetes, container, code and runtime security without changing tools as the team grows.

Compare vs Aikido →Compare vs Wiz →Vulnerability Management hub →

Server Security FAQ

Server vulnerability monitoring continuously inventories packages, kernels and services on Linux servers and cloud VMs, matches them against CVE and advisory feeds, and tracks patch status over time. TigerGate adds CIS benchmark checks for OS hardening and prioritizes findings using CISA KEV, EPSS and runtime signals so you fix what attackers actually use.
Both work and TigerGate supports both. Agentless scanning reads cloud snapshots and inventory APIs — fast to deploy, zero host impact, but a point-in-time view. The lightweight agent gives continuous coverage, picks up on-prem and air-gapped hosts, and feeds the eBPF runtime signal so we know which CVEs are loaded in a running process. Most teams start agentless and add the agent on crown-jewel hosts.
Debian, Ubuntu, RHEL, CentOS, Rocky, AlmaLinux, Oracle Linux, Amazon Linux 2 and 2023, SUSE and Fedora. Cloud VMs on AWS (EC2), Azure (VM), GCP (GCE) and Oracle Cloud. On-prem Linux hosts via the agent. Windows Server monitoring is on the roadmap.
Every CVE gets a composite score built from CVSS severity, CISA KEV listing (known exploited in the wild), EPSS probability (likelihood of exploitation in the next 30 days), network exposure of the host, and — when the agent is deployed — whether the vulnerable library is actually loaded by a running process. Teams typically find 3–7% of their raw CVE count is both exploitable and reachable; that is the queue worth paging on.
Tenable and Qualys are long-standing enterprise VM tools with wide OS and network scanner coverage; both are priced per asset and sold through sales teams. Intruder is self-serve and SMB-friendly but focused on external and basic internal scanning. TigerGate is self-serve like Intruder but adds eBPF runtime context, cloud and Kubernetes posture, and container scanning in the same console — so a Linux CVE, the AMI it came from, and the Kubernetes workload running it live in one record.
Yes. TigerGate generates CERT-In VAPT-aligned vulnerability reports and PCI-DSS 11.3 internal and external scan reports with discovery date, severity, remediation, closure date and evidence trail. Reports export as PDF or CSV and are retained for the audit window.
When a critical CVE has no patch yet, or the fix is weeks away, TigerGate's eBPF enforcement can block the exploitation pattern at the kernel boundary without changing the application. It is a time-buyer, not a replacement for patching, and every virtual patch has a visible expiry linked to the real fix.
Per monitored host per month, usage-based, with a 14-day free trial. On-prem agent is included; cloud VMs can be covered agentless or with the agent at the same price. Bundles are available with container, Kubernetes and runtime security.

Scan your first server free

14-day trial. No credit card. Agentless onboarding in minutes; agent is optional.

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