How severe is CVE-2018-5923?

CVE-2018-5923 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-2018-5923 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-5923?

CVE-2018-5923 primarily affects Hp Color Laserjet Cm4540 Mfp Firmware. In total, 138 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-5923?

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-2018-5923 published?

CVE-2018-5923 was published on 2019-03-27 and last updated on 2026-06-17.

CVE-2018-5923

CVE-2018-5923 is a critical-severity vulnerability in Hp Color Laserjet Cm4540 Mfp Firmware with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-347.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 3% (84th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-347
Affected product: Hp Color Laserjet Cm4540 Mfp Firmware
Published: 2019-03-27
Last modified: 2026-06-17

Description

In HP LaserJet Enterprise, HP PageWide Enterprise, HP LaserJet Managed, and HP OfficeJet Enterprise Printers, solution application signature checking may allow potential execution of arbitrary code.

Frequently asked questions

What is CVE-2018-5923?: In HP LaserJet Enterprise, HP PageWide Enterprise, HP LaserJet Managed, and HP OfficeJet Enterprise Printers, solution application signature checking may allow potential execution of arbitrary code.
How severe is CVE-2018-5923?: CVE-2018-5923 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-2018-5923 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-5923?: CVE-2018-5923 primarily affects Hp Color Laserjet Cm4540 Mfp Firmware. In total, 138 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-5923?: 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-2018-5923 published?: CVE-2018-5923 was published on 2019-03-27 and last updated on 2026-06-17.

References

https://support.hp.com/us-en/document/c06169434

Affected products (138)

cpe:2.3:o:hp:color_laserjet_cm4540_mfp_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_cp5525_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_enterprise_flow_mfp_m681f_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_enterprise_flow_mfp_m681z_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_enterprise_flow_mfp_m682z_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_enterprise_m552_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_enterprise_m553_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_enterprise_m651_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_enterprise_m652n_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_enterprise_m652dn_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_enterprise_m653dn_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_enterprise_m653dh_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_enterprise_m653x_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_enterprise_m750_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_enterprise_mfp_m577_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_enterprise_mfp_m681dh_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_enterprise_mfp_m681f_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_enterprise_mfp_m682dh_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_m680_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_managed_e55040dw_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_managed_e65050dn_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_managed_e65060dn_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_managed_e65060x_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_managed_flow_mfp_e57540c_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_managed_flow_mfp_e67550f_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_managed_flow_mfp_e67560z_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_managed_flow_mfp_e77822_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_managed_flow_mfp_e77825_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_managed_flow_mfp_e77830z_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_managed_flow_mfp_e87640_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_managed_flow_mfp_e87650_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_managed_flow_mfp_e87660z_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_managed_flow_mfp_e87640z_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_managed_mfp_e57540dn_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_managed_mfp_e67550dh_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_managed_mfp_e67560dh_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_managed_mfp_e77822_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_managed_mfp_e77825_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_managed_mfp_e77830dn_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_managed_mfp_e87640_firmware:*:*:*:*:*:*:*:*

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