How should we interpret CVSS severity scores?

CVSS estimates technical severity, but it does not automatically equal business risk. Prioritize using context like internet exposure, asset criticality, known exploitation, and whether compensating controls exist. A Medium CVSS on an exposed production system can be more urgent than a Critical on an isolated non-production host.

Vulnerability Database

Q: What is a Vulnerability (CVE) and why does it matter?

A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.

Q: What's the difference between a vulnerability, an exploit, and a zero-day?

A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. Risk increases sharply when exploitation becomes reliable or widespread.

Q: Why do vulnerabilities keep reappearing in our environment?

Recurring findings usually come from incomplete asset discovery, inconsistent patch management, inherited images, and configuration drift. In modern environments, you also need to watch the software supply chain: dependencies, containers, build pipelines, and third-party services can reintroduce the same weakness even after you patch a single host.

Q: How do we prioritize remediation without burning out the team?

Use a repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress so remediation is steady, not reactive.

Q: How can SynScan help reduce vulnerability risk over time?

SynScan combines attack surface monitoring and continuous security auditing to keep your inventory current, flag high-impact vulnerabilities early, and help you turn raw findings into a practical remediation plan.

393,392

Total vulnerabilities in the database

Vulnerabilities for products matching "xen"

Found 4 matching products. Filters apply to all results.

You can search for specific versions with /product/xen/1.2.3

xen / xen

435 vulnerabilities found

Title	Severity	Date	Affected versions
CVE-2015-2751	High	April 1, 2015 4/1/15	`= 4.3.0` `= 4.3.1` `= 4.3.2` `= 4.4.0` `= 4.4.0-rc1` `= 4.4.1` `= 4.5.0`
CVE-2015-2152	Low	March 18, 2015 3/18/15	`<= 4.5.0`
CVE-2015-2151	High	March 12, 2015 3/12/15	`= 3.2.0` `= 3.2.1` `= 3.2.2` `= 3.2.3` `= 3.3.0` `= 3.3.1` `= 3.3.2` `= 3.4.0` `= 3.4.1` `= 3.4.2` `= 3.4.3` `= 3.4.4` `= 4.0.0` `= 4.0.1` `= 4.0.2` `= 4.0.3` `= 4.0.4` `= 4.1.0` `= 4.1.1` `= 4.1.2` `= 4.1.3` `= 4.1.4` `= 4.1.5` `= 4.1.6.1` `= 4.2.0` `= 4.2.1` `= 4.2.2` `= 4.2.3` `= 4.3.0` `= 4.3.1` `= 4.4.0` `= 4.4.0-rc1` `= 4.4.1` `= 4.5.0`
CVE-2015-2150	Medium	March 12, 2015 3/12/15	`= 3.3.0` `= 3.3.1` `= 3.3.2` `= 3.4.0` `= 3.4.1` `= 3.4.2` `= 3.4.3` `= 3.4.4` `= 4.0.0` `= 4.0.1` `= 4.0.2` `= 4.0.3` `= 4.0.4` `= 4.1.0` `= 4.1.1` `= 4.1.2` `= 4.1.3` `= 4.1.4` `= 4.1.5` `= 4.1.6.1` `= 4.2.0` `= 4.2.1` `= 4.2.2` `= 4.2.3` `= 4.3.0` `= 4.3.1` `= 4.4.0` `= 4.4.0-rc1` `= 4.4.1` `= 4.5.0`
CVE-2015-2045	Low	March 12, 2015 3/12/15	`= 3.2.0` `= 3.2.1` `= 3.2.2` `= 3.2.3` `= 3.3.0` `= 3.3.1` `= 3.3.2` `= 3.4.0` `= 3.4.1` `= 3.4.2` `= 3.4.3` `= 3.4.4` `= 4.0.0` `= 4.0.1` `= 4.0.2` `= 4.0.3` `= 4.0.4` `= 4.1.0` `= 4.1.1` `= 4.1.2` `= 4.1.3` `= 4.1.4` `= 4.1.5` `= 4.1.6.1` `= 4.2.0` `= 4.2.1` `= 4.2.2` `= 4.2.3` `= 4.3.0` `= 4.3.1` `= 4.4.0` `= 4.4.0-rc1` `= 4.4.1` `= 4.5.0`
CVE-2015-2044	Low	March 12, 2015 3/12/15	`= 3.2.0` `= 3.2.1` `= 3.2.2` `= 3.2.3` `= 3.3.0` `= 3.3.1` `= 3.3.2` `= 3.4.0` `= 3.4.1` `= 3.4.2` `= 3.4.3` `= 3.4.4` `= 4.0.0` `= 4.0.1` `= 4.0.2` `= 4.0.3` `= 4.0.4` `= 4.1.0` `= 4.1.1` `= 4.1.2` `= 4.1.3` `= 4.1.4` `= 4.1.5` `= 4.1.6.1` `= 4.2.0` `= 4.2.1` `= 4.2.2` `= 4.2.3` `= 4.3.0` `= 4.3.1` `= 4.4.0` `= 4.4.0-rc1` `= 4.4.1` `= 4.5.0`
CVE-2015-0268	Medium	February 16, 2015 2/16/15	`= 4.5.0`
CVE-2015-1563	Low	February 9, 2015 2/9/15	`= 4.0.0` `= 4.0.1` `= 4.0.2` `= 4.0.3` `= 4.0.4` `= 4.1.0` `= 4.1.1` `= 4.1.2` `= 4.1.3` `= 4.1.4` `= 4.1.5` `= 4.1.6.1` `= 4.2.0` `= 4.2.1` `= 4.2.2` `= 4.2.3` `= 4.3.0` `= 4.3.1` `= 4.4.0` `= 4.4.0-rc1` `= 4.4.1` `= 4.5.0`
CVE-2014-6268	Medium	January 12, 2015 1/12/15	`= 4.4.0` `= 4.4.0-rc1` `= 4.4.1`
CVE-2015-0361	High	January 7, 2015 1/7/15	`= 4.2.0` `= 4.2.1` `= 4.2.2` `= 4.2.3` `= 4.2.4` `= 4.2.5` `= 4.3.0` `= 4.3.1` `= 4.3.2` `= 4.3.3` `= 4.4.0` `= 4.4.1`
CVE-2014-9066	Medium	December 9, 2014 12/9/14	`<= 4.4.1`
CVE-2014-9065	Medium	December 9, 2014 12/9/14	`<= 4.4.1`
CVE-2014-8867	Medium	December 1, 2014 12/1/14	`<= 3.2.0` `= 3.2.1` `= 3.2.2` `= 3.2.3` `= 4.4.0` `= 4.4.1`
CVE-2014-8866	Medium	December 1, 2014 12/1/14	`= 3.3.0` `= 3.3.1` `= 3.3.2` `= 3.4.0` `= 3.4.1` `= 3.4.2` `= 3.4.3` `= 3.4.4` `= 4.0.0` `= 4.0.1` `= 4.0.2` `= 4.0.3` `= 4.0.4` `= 4.1.0` `= 4.1.1` `= 4.1.2` `= 4.1.3` `= 4.1.4` `= 4.1.5` `= 4.1.6.1` `= 4.2.0` `= 4.2.1` `= 4.2.2` `= 4.2.3` `= 4.3.0` `= 4.3.1` `= 4.4.0` `= 4.4.0-rc1`
CVE-2014-9030	High	November 24, 2014 11/24/14	`= 3.2.0` `= 3.2.1` `= 3.2.2` `= 3.2.3` `= 3.3.0` `= 3.3.1` `= 3.3.2` `= 3.4.0` `= 3.4.1` `= 3.4.2` `= 3.4.3` `= 3.4.4` `= 4.0.0` `= 4.0.1` `= 4.0.2` `= 4.0.3` `= 4.0.4` `= 4.1.0` `= 4.1.1` `= 4.1.2` `= 4.1.3` `= 4.1.4` `= 4.1.5` `= 4.1.6.1` `= 4.2.0` `= 4.2.1` `= 4.2.2` `= 4.2.3` `= 4.3.0` `= 4.3.1` `= 4.4.0` `= 4.4.1`
CVE-2014-8595	Low	November 19, 2014 11/19/14	`= 3.2.1` `= 3.2.2` `= 3.2.3` `= 3.3.0` `= 3.3.1` `= 3.3.2` `= 3.4.0` `= 3.4.1` `= 3.4.2` `= 3.4.3` `= 3.4.4` `= 4.0.0` `= 4.0.1` `= 4.0.2` `= 4.0.3` `= 4.0.4` `= 4.1.0` `= 4.1.1` `= 4.1.2` `= 4.1.3` `= 4.1.4` `= 4.1.5` `= 4.1.6.1` `= 4.2.0` `= 4.2.1` `= 4.2.2` `= 4.2.3` `= 4.3.0` `= 4.3.1` `= 4.4.0`
CVE-2014-8594	Medium	November 19, 2014 11/19/14	`= 4.0.0` `= 4.0.1` `= 4.0.2` `= 4.0.3` `= 4.0.4` `= 4.1.0` `= 4.1.1` `= 4.1.2` `= 4.1.3` `= 4.1.4` `= 4.1.5` `= 4.1.6.1` `= 4.2.0` `= 4.2.1` `= 4.2.2` `= 4.2.3` `= 4.3.0` `= 4.3.1`
CVE-2014-5148	Medium	October 26, 2014 10/26/14	`= 4.4.1` `= 4.4.0`
CVE-2014-7154	Medium	October 2, 2014 10/2/14	`= 4.1.0` `= 4.1.1` `= 4.1.2` `= 4.1.3` `= 4.1.4` `= 4.1.5` `= 4.1.6.1` `= 4.2.0` `= 4.2.1` `= 4.2.2` `= 4.2.3` `= 4.3.0` `= 4.3.1` `= 4.4.0` `= 4.4.0-rc1` `= 4.4.1`
CVE-2014-7155	Medium	October 2, 2014 10/2/14	`<= 4.4.0` `= 3.0.2` `= 3.0.3` `= 3.0.4` `= 3.1.3` `= 3.1.4` `= 3.2.0` `= 3.2.1` `= 3.2.2` `= 3.2.3` `= 3.3.0` `= 3.3.1` `= 3.3.2` `= 3.4.0` `= 3.4.1` `= 3.4.2` `= 3.4.3` `= 3.4.4` `= 4.0.0` `= 4.0.1` `= 4.0.2` `= 4.0.3` `= 4.0.4` `= 4.1.0` `= 4.1.1` `= 4.1.2` `= 4.1.3` `= 4.1.4` `= 4.1.5` `= 4.1.6.1` `= 4.2.0` `= 4.2.1` `= 4.2.2` `= 4.2.3` `= 4.3.0` `= 4.3.1` `= 4.4.0` `= 4.4.0-rc1`
CVE-2014-7156	Low	October 2, 2014 10/2/14	`= 3.3.0` `= 3.3.1` `= 3.3.2` `= 4.1.0` `= 4.1.1` `= 4.1.2` `= 4.1.3` `= 4.1.4` `= 4.1.5` `= 4.1.6.1` `= 4.2.0` `= 4.2.1` `= 4.2.2` `= 4.2.3` `= 4.3.0` `= 4.3.1` `= 4.4.0` `= 4.4.0-rc1` `= 4.4.1`
CVE-2014-7188	High	October 2, 2014 10/2/14	`= 4.1.0` `= 4.1.1` `= 4.1.2` `= 4.1.3` `= 4.1.4` `= 4.1.5` `= 4.1.6.1` `= 4.2.0` `= 4.2.1` `= 4.2.2` `= 4.2.3` `= 4.3.0` `= 4.3.1` `= 4.4.0` `= 4.4.0-rc1` `= 4.4.1`
CVE-2014-5147	Medium	August 29, 2014 8/29/14	`= 4.4.0` `= 4.4.0-rc1`
CVE-2014-5146	Medium	August 22, 2014 8/22/14	`= 4.2.0` `= 4.2.1` `= 4.2.2` `= 4.2.3` `= 4.3.0` `= 4.3.1` `= 4.4.0`
CVE-2014-5149	Medium	August 22, 2014 8/22/14	`= 4.2.0` `= 4.2.1` `= 4.2.2` `= 4.2.3` `= 4.3.0` `= 4.3.1` `= 4.4.0`
CVE-2014-4022	Low	July 9, 2014 7/9/14	`= 4.4.0` `= 4.4.0-rc1`
CVE-2014-4021	Low	June 18, 2014 6/18/14	`= 3.2.0` `= 3.2.1` `= 3.2.2` `= 3.2.3` `= 4.0.0` `= 4.0.1` `= 4.0.2` `= 4.0.3` `= 4.0.4` `= 4.1.0` `= 4.1.1` `= 4.1.2` `= 4.1.3` `= 4.1.4` `= 4.1.5` `= 4.1.6.1` `= 4.2.0` `= 4.2.1` `= 4.2.2` `= 4.2.3` `= 4.3.0` `= 4.3.1` `= 4.4.0` `= 4.4.0-rc1`
CVE-2014-3967	Medium	June 5, 2014 6/5/14	`= 4.2.0` `= 4.2.1` `= 4.2.2` `= 4.2.3` `= 4.4.0` `= 4.4.0-rc1` `= 4.3.0` `= 4.3.1`
CVE-2014-3968	Medium	June 5, 2014 6/5/14	`= 4.3.0` `= 4.3.1` `= 4.2.0` `= 4.2.1` `= 4.2.2` `= 4.2.3` `= 4.4.0` `= 4.4.0-rc1`
CVE-2014-3969	High	June 5, 2014 6/5/14	`= 4.4.0` `= 4.4.0-rc1`
CVE-2014-3714	Low	May 19, 2014 5/19/14	`= 4.4.0` `= 4.4.0-rc1`
CVE-2014-3715	Low	May 19, 2014 5/19/14	`= 4.4.0` `= 4.4.0-rc1`
CVE-2014-3716	Low	May 19, 2014 5/19/14	`= 4.4.0` `= 4.4.0-rc1`
CVE-2014-3717	Low	May 19, 2014 5/19/14	`= 4.4.0` `= 4.4.0-rc1`
CVE-2014-3124	Medium	May 7, 2014 5/7/14	`= 4.1.0` `= 4.1.1` `= 4.1.2` `= 4.1.3` `= 4.1.4` `= 4.1.5` `= 4.1.6.1` `= 4.2.0` `= 4.2.1` `= 4.2.2` `= 4.2.3` `= 4.3.0` `= 4.3.1` `= 4.4.0` `= 4.4.0-rc1`
CVE-2014-3125	Medium	May 2, 2014 5/2/14	`= 4.4.0` `= 4.4.0-rc1`
CVE-2014-2986	Medium	April 28, 2014 4/28/14	`= 4.4.0` `= 4.4.0-rc1`
CVE-2014-2915	Medium	April 24, 2014 4/24/14	`= 4.4.0` `= 4.4.0-rc1`
CVE-2014-1891	Medium	April 1, 2014 4/1/14	`<= 4.3.0` `= 3.2.0` `= 3.2.1` `= 3.2.2` `= 3.2.3` `= 3.3.0` `= 3.3.1` `= 3.3.2` `= 3.4.0` `= 3.4.1` `= 3.4.2` `= 3.4.3` `= 3.4.4` `= 4.1.0` `= 4.1.1` `= 4.1.2` `= 4.1.3` `= 4.1.4` `= 4.1.5` `= 4.1.6.1` `= 4.2.0` `= 4.2.1` `= 4.2.2` `= 4.2.3` `= 4.3.1`
CVE-2014-1892	Medium	April 1, 2014 4/1/14	`= 3.3.0` `= 3.3.1` `= 3.3.2` `= 3.4.0` `= 3.4.1` `= 3.4.2` `= 3.4.3` `= 3.4.4` `= 4.0.0` `= 4.0.1` `= 4.0.2` `= 4.0.3` `= 4.0.4` `= 4.1.0` `= 4.1.1` `= 4.1.2` `= 4.1.3` `= 4.1.4` `= 4.1.5` `= 4.1.6.1`
CVE-2014-1893	Medium	April 1, 2014 4/1/14	`<= 4.1.6.1` `= 3.2.0` `= 3.2.1` `= 3.2.2` `= 3.2.3` `= 3.3.0` `= 3.3.1` `= 3.3.2` `= 3.4.0` `= 3.4.1` `= 3.4.2` `= 3.4.3` `= 3.4.4` `= 4.0.0` `= 4.0.1` `= 4.0.2` `= 4.0.3` `= 4.0.4` `= 4.1.0` `= 4.1.1` `= 4.1.2` `= 4.1.3` `= 4.1.4` `= 4.1.5`
CVE-2014-1894	Medium	April 1, 2014 4/1/14	`<= 3.2.3` `= 3.0.2` `= 3.0.3` `= 3.0.4` `= 3.1.3` `= 3.1.4` `= 3.2.0` `= 3.2.1` `= 3.2.2`
CVE-2014-1895	Medium	April 1, 2014 4/1/14	`= 4.2.0` `= 4.2.1` `= 4.2.2` `= 4.2.3` `= 4.3.0` `= 4.3.1`
CVE-2014-1896	Medium	April 1, 2014 4/1/14	`= 4.2.0` `= 4.2.1` `= 4.2.2` `= 4.2.3` `= 4.3.0` `= 4.3.1` `= 4.4.0-rc1`
CVE-2014-2599	Medium	March 28, 2014 3/28/14	`= 4.1.0` `= 4.1.1` `= 4.1.2` `= 4.1.3` `= 4.1.4` `= 4.1.5` `= 4.1.6.1` `= 4.2.0` `= 4.2.1` `= 4.2.2` `= 4.2.3` `= 4.3.0` `= 4.3.1` `= 4.3.2` `= 4.4.0`
CVE-2014-1950	Medium	February 14, 2014 2/14/14	`= 4.1.1` `= 4.1.2` `= 4.1.3` `= 4.1.4` `= 4.1.5` `= 4.1.6.1` `= 4.2.0` `= 4.2.1` `= 4.2.2` `= 4.2.3` `= 4.3.0` `= 4.3.1`
CVE-2014-1642	Medium	January 26, 2014 1/26/14	`= 4.2.0` `= 4.2.1` `= 4.2.2` `= 4.2.3` `= 4.3.0` `= 4.3.1`
CVE-2014-1666	High	January 26, 2014 1/26/14	`= 4.1.5` `= 4.1.6.1` `= 4.2.2` `= 4.2.3` `= 4.3.0` `= 4.3.1`
CVE-2013-4375	Low	January 19, 2014 1/19/14	`= 4.2.0` `= 4.2.1` `= 4.2.2` `= 4.2.3` `= 4.3.0`
CVE-2011-1166	Medium	January 7, 2014 1/7/14	`<= 4.0.1` `= 3.0.2` `= 3.0.3` `= 3.0.4` `= 3.1.3` `= 3.1.4` `= 3.2.0` `= 3.2.1` `= 3.2.2` `= 3.2.3` `= 3.3.0` `= 3.3.1` `= 3.3.2` `= 3.4.0` `= 3.4.1` `= 3.4.2` `= 3.4.3` `= 3.4.4` `= 4.0.0`

Showing vulnerabilities for 4 products matching "xen". Each product has independent pagination.

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Frequently Asked Questions

What is a Vulnerability (CVE) and why does it matter?

A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.

CVSS (Common Vulnerability Scoring System) estimates technical severity, but it doesn't automatically equal business risk. Prioritize using context like internet exposure, affected asset criticality, known exploitation (proof-of-concept or in-the-wild), and whether compensating controls exist. A "Medium" CVSS on an exposed, production system can be more urgent than a "Critical" on an isolated, non-production host.

A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. In practice, risk increases sharply when exploitation becomes reliable or widespread.

Recurring findings usually come from incomplete Asset Discovery, inconsistent patch management, inherited images, and configuration drift. In modern environments, you also need to watch the software supply chain: dependencies, containers, build pipelines, and third-party services can reintroduce the same weakness even after you patch a single host. Unknown or unmanaged assets (often called Shadow IT) are a common reason the same issues resurface.

Use a simple, repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress using consistent metrics so remediation is steady, not reactive.

SynScan combines attack surface monitoring and continuous security auditing to keep your inventory current, flag high-impact vulnerabilities early, and help you turn raw findings into a practical remediation plan.