Vulnerability Database

383,304

Total vulnerabilities in the database

CVE-2021-45046 — apache / log4j

Deserialization of Untrusted Data

It was found that the fix to address CVE-2021-44228 in Apache Log4j 2.15.0 was incomplete in certain non-default configurations. This could allows attackers with control over Thread Context Map (MDC) input data when the logging configuration uses a non-default Pattern Layout with either a Context Lookup (for example, $${ctx:loginId}) or a Thread Context Map pattern (%X, %mdc, or %MDC) to craft malicious input data using a JNDI Lookup pattern resulting in an information leak and remote code execution in some environments and local code execution in all environments. Log4j 2.16.0 (Java 8) and 2.12.2 (Java 7) fix this issue by removing support for message lookup patterns and disabling JNDI functionality by default.

CVSS v3:

  • Severity: Critical
  • Score: 9
  • AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H/E:H

CVSS v2:

  • Severity: Medium
  • Score: 5.1
  • AV:N/AC:H/Au:N/C:P/I:P/A:P
Software Affected versions
apache / log4j >= 2.0.1, < 2.12.2
apache / log4j >= 2.13.0, < 2.16.0
siemens / logo!_soft_comfort All versions
siemens / spectrum_power_4 < 4.70
siemens / siveillance_control_pro All versions
siemens / head-end_system_universal_device_integration_system All versions
siemens / gma-manager < 8.6.2j-398
siemens / e-car_operation_center < 2021-12-13
siemens / comos All versions
siemens / navigator < 2021-12-13
siemens / vesys < 2019.1
siemens / teamcenter All versions
siemens / spectrum_power_7 < 2.30
siemens / solid_edge_harness_design < 2020
siemens / solid_edge_cam_pro All versions
siemens / siveillance_viewpoint All versions
siemens / siveillance_vantage All versions
siemens / nx All versions
siemens / mindsphere < 2021-12-11
siemens / mendix All versions
siemens / industrial_edge_management_hub < 2021-12-13
siemens / industrial_edge_management All versions
siemens / captial < 2019.1
siemens / tracealertserverplus All versions
sonicwall / email_security < 10.0.12
siemens / 6bk1602-0aa12-0tp0_firmware < 2.7.0
siemens / 6bk1602-0aa22-0tp0_firmware < 2.7.0
siemens / 6bk1602-0aa32-0tp0_firmware < 2.7.0
siemens / 6bk1602-0aa42-0tp0_firmware < 2.7.0
siemens / 6bk1602-0aa52-0tp0_firmware < 2.7.0
Maven icon org.apache.logging.log4j / log4j-core >= 2.13.0, < 2.16.0
Maven icon org.apache.logging.log4j / log4j-core < 2.12.2
Maven icon org.ops4j.pax.logging / pax-logging-log4j2 >= 1.8.0, < 1.9.2
Maven icon org.ops4j.pax.logging / pax-logging-log4j2 >= 1.10.0, < 1.10.8
Maven icon org.ops4j.pax.logging / pax-logging-log4j2 >= 1.11.0, < 1.11.11
Maven icon org.ops4j.pax.logging / pax-logging-log4j2 >= 2.0.0, < 2.0.12
apache / log4j = 2.0
apache / log4j = 2.0-beta9
apache / log4j = 2.0-rc1
apache / log4j = 2.0-rc2
siemens / captial = 2019.1
siemens / captial = 2019.1-sp1912
siemens / desigo_cc_advanced_reports = 4.0
siemens / desigo_cc_advanced_reports = 4.1
siemens / desigo_cc_advanced_reports = 4.2
siemens / desigo_cc_advanced_reports = 5.0
siemens / desigo_cc_advanced_reports = 5.1
siemens / desigo_cc_info_center = 5.0
siemens / desigo_cc_info_center = 5.1
siemens / energy_engage = 3.1
siemens / energyip = 8.5
siemens / energyip = 8.6
siemens / energyip = 8.7
siemens / energyip = 9.0
siemens / energyip_prepay = 3.7
siemens / energyip_prepay = 3.8
siemens / opcenter_intelligence <= 3.2
siemens / operation_scheduler <= 1.1.3
siemens / sentron_powermanager = 4.1
siemens / sentron_powermanager = 4.2
siemens / siguard_dsa = 4.2
siemens / siguard_dsa = 4.3
siemens / siguard_dsa = 4.4
siemens / sipass_integrated = 2.80
siemens / sipass_integrated = 2.85
siemens / siveillance_command <= 4.16.2.1
siemens / siveillance_identity = 1.5
siemens / siveillance_identity = 1.6
siemens / solid_edge_harness_design = 2020
siemens / solid_edge_harness_design = 2020-sp2002
siemens / spectrum_power_4 = 4.70
siemens / spectrum_power_4 = 4.70-sp7
siemens / spectrum_power_4 = 4.70-sp8
siemens / spectrum_power_7 = 2.30
siemens / spectrum_power_7 = 2.30-sp2
siemens / vesys = 2019.1
siemens / vesys = 2019.1-sp1912
debian / debian_linux = 10.0
debian / debian_linux = 11.0
fedoraproject / fedora = 34
fedoraproject / fedora = 35

Frequently Asked Questions

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.