How severe is CVE-2017-5645?

CVE-2017-5645 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2017-5645 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 89% (100th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-5645?

CVE-2017-5645 primarily affects Apache Log4j. In total, 170 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2017-5645?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2017-5645 published?

CVE-2017-5645 was published on 2017-04-17 and last updated on 2026-06-17.

CVE-2017-5645

CVE-2017-5645 is a critical-severity vulnerability in Apache Log4j with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 89% places it in the 100th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-502.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 89% (100th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-502
Affected product: Apache Log4j
Published: 2017-04-17
Last modified: 2026-06-17

Description

In Apache Log4j 2.x before 2.8.2, when using the TCP socket server or UDP socket server to receive serialized log events from another application, a specially crafted binary payload can be sent that, when deserialized, can execute arbitrary code.

Frequently asked questions

What is CVE-2017-5645?: In Apache Log4j 2.x before 2.8.2, when using the TCP socket server or UDP socket server to receive serialized log events from another application, a specially crafted binary payload can be sent that, when deserialized, can execute arbitrary code.
How severe is CVE-2017-5645?: CVE-2017-5645 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2017-5645 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 89% (100th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-5645?: CVE-2017-5645 primarily affects Apache Log4j. In total, 170 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2017-5645?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2017-5645 published?: CVE-2017-5645 was published on 2017-04-17 and last updated on 2026-06-17.

References

Affected products (170)

cpe:2.3:a:apache:log4j:*:*:*:*:*:*:*:*
cpe:2.3:a:netapp:oncommand_api_services:-:*:*:*:*:*:*:*
cpe:2.3:a:netapp:oncommand_insight:-:*:*:*:*:*:*:*
cpe:2.3:a:netapp:oncommand_workflow_automation:-:*:*:*:*:*:*:*
cpe:2.3:a:netapp:service_level_manager:-:*:*:*:*:*:*:*
cpe:2.3:a:netapp:snapcenter:-:*:*:*:*:*:*:*
cpe:2.3:a:netapp:storage_automation_store:-:*:*:*:*:*:*:*
cpe:2.3:a:redhat:fuse:1.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:6.7:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:7.3:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:7.4:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:7.5:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:7.6:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_server_aus:7.4:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_server_eus:7.4:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_server_eus:7.5:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_server_eus:7.6:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_server_tus:7.4:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:api_gateway:11.1.2.4.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:application_testing_suite:13.3.0.1:*:*:*:*:*:*:*
cpe:2.3:a:oracle:autovue_vuelink_integration:21.0.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:autovue_vuelink_integration:21.0.1:*:*:*:*:*:*:*
cpe:2.3:a:oracle:banking_platform:2.6.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:banking_platform:2.6.1:*:*:*:*:*:*:*
cpe:2.3:a:oracle:banking_platform:2.6.2:*:*:*:*:*:*:*
cpe:2.3:a:oracle:bi_publisher:11.1.1.7.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:bi_publisher:11.1.1.9.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:bi_publisher:12.2.1.3.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:bi_publisher:12.2.1.4.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_converged_application_server_-_service_controller:6.1:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_instant_messaging_server:10.0.1.3.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_interactive_session_recorder:*:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_messaging_server:*:*:*:*:*:*:*:*

More vulnerabilities in Apache Log4j

CVE-2021-44228 — Critical (CVSS 10.0): Apache Log4j2 2.0-beta9 through 2.15.0 (excluding security releases 2.12.2, 2.12.3, and 2.3.1) JNDI features used in…
CVE-2022-23305 — Critical (CVSS 9.8): By design, the JDBCAppender in Log4j 1.2.x accepts an SQL statement as a configuration parameter where the values to be…
CVE-2020-9493 — Critical (CVSS 9.8): A deserialization flaw was found in Apache Chainsaw versions prior to 2.1.0 which could lead to malicious code…
CVE-2019-17571 — Critical (CVSS 9.8): Included in Log4j 1.2 is a SocketServer class that is vulnerable to deserialization of untrusted data which can be…
CVE-2021-45046 — Critical (CVSS 9.0): It was found that the fix to address CVE-2021-44228 in Apache Log4j 2.15.0 was incomplete in certain non-default…
CVE-2022-23307 — High (CVSS 8.8): CVE-2020-9493 identified a deserialization issue that was present in Apache Chainsaw. Prior to Chainsaw V2.0 Chainsaw…

All CVEs affecting Apache Log4j →

Other CWE-502 (Deserialization of Untrusted Data) vulnerabilities

CVE-2026-41104 — Critical (CVSS 10.0): Deserialization of untrusted data in Microsoft Planetary Computer Pro allows an unauthorized attacker to disclose…
CVE-2026-43633 — Critical (CVSS 10.0): HestiaCP versions 1.9.0 through 1.9.4 contain a deserialization vulnerability in the web terminal component caused by a…
CVE-2026-33819 — Critical (CVSS 10.0): Deserialization of untrusted data in Microsoft Bing allows an unauthorized attacker to execute code over a network.
CVE-2026-20131 — Critical (CVSS 10.0): A vulnerability in the web-based management interface of Cisco Secure Firewall Management Center (FMC) Software could…
CVE-2026-25632 — Critical (CVSS 10.0): EPyT-Flow is a Python package designed for the easy generation of hydraulic and water quality scenario data of water…
CVE-2025-14931 — Critical (CVSS 10.0): Hugging Face smolagents Remote Python Executor Deserialization of Untrusted Data Remote Code Execution Vulnerability.…

Browse all CWE-502 (Deserialization of Untrusted Data) vulnerabilities →