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Jwt Attack CVE-2019-6318

CRITICAL
Improper Verification of Cryptographic Signature (CWE-347)
2019-04-11 hp-security-alert@hp.com
RCE HP Jwt Attack Color Laserjet Cm4540 Mfp Firmware Color Laserjet Enterprise M552 Firmware Color Laserjet Enterprise M553 Firmware Color Laserjet Enterprise M651 Firmware Color Laserjet Enterprise M750 Firmware Color Laserjet Enterprise Mfp M577 Firmware Color Laserjet Managed E55040Dw Firmware Color Laserjet Managed Flow Mfp E77822 Firmware Color Laserjet Managed Flow Mfp E77825 Firmware Color Laserjet Managed Flow Mfp E87640 Firmware Color Laserjet Managed Flow Mfp E87650 Firmware Color Laserjet Managed Mfp E77822 Firmware Color Laserjet Managed Mfp E77825 Firmware Color Laserjet Managed Mfp E87640 Firmware Color Laserjet Managed Mfp E87650 Firmware Digital Sender Flow 8500 Fn2 Document Capture Workstation Firmware Laserjet Enterprise 500 Mfp M525F Firmware Laserjet Enterprise 600 M601 Firmware Laserjet Enterprise 600 M602 Firmware Laserjet Enterprise 700 Color Mfp M775 Firmware Laserjet Enterprise M4555 Mfp Firmware Laserjet Enterprise M506 Firmware Laserjet Enterprise M604 Firmware Laserjet Enterprise M605 Firmware Laserjet Enterprise M606 Firmware Laserjet Enterprise M806 Firmware Laserjet Enterprise Mfp M527 Firmware Laserjet Enterprise Mfp M630 Firmware Laserjet Enterprise Mfp M725 Firmware Laserjet Managed Flow Mfp E52545C Firmware Laserjet Managed Flow Mfp E72525 Firmware Laserjet Managed Flow Mfp E72530 Firmware Laserjet Managed Flow Mfp E82540 Firmware Laserjet Managed Flow Mfp E82550 Firmware Laserjet Managed Mfp E72525 Firmware Laserjet Managed Mfp E72530 Firmware Laserjet Managed Mfp E82540 Firmware Laserjet Managed Mfp E82550 Firmware Officejet Enterprise Color Flow Mfp X585 Firmware Officejet Enterprise Color Mfp X585 Firmware Pagewide Enterprise Color Flow Mfp 586Z Firmware Pagewide Managed Color Flow Mfp E58650Z Firmware Pagewide Managed Color Flow Mfp E77660Z Firmware Pagewide Managed Color Mfp E58650Dn Firmware Color Laserjet Enterprise Cp5525 Firmware Color Laserjet Managed M553 Firmware Color Laserjet Managed M651 Firmware Color Laserjet Enterprise M652 Firmware Color Laserjet Enterprise M653 Firmware Color Laserjet Enterprise M855 Firmware Color Laserjet Enterprise Flow Mfp M577 Firmware Color Laserjet Enterprise Mfp M680 Firmware Color Laserjet Enterprise Flow Mfp M680 Firmware Color Laserjet Enterprise Mfp M681 Firmware Color Laserjet Enterprise Flow Mfp M681 Firmware Color Laserjet Enterprise Mfp M682 Firmware Color Laserjet Enterprise Flow Mfp M682 Firmware Color Laserjet Enterprise Flow Mfp M880Z Firmware Color Laserjet Managed Flow Mfp M880Zm Firmware Color Laserjet Managed E65050 Firmware Color Laserjet Managed E65060 Firmware Color Laserjet Managed Flow Mfp E77830 Firmware Color Laserjet Managed Mfp E57540 Firmware Color Laserjet Managed Flow Mfp E57540 Firmware Color Laserjet Managed Mfp E67550 Firmware Color Laserjet Managed Mfp E67560 Firmware Color Laserjet Managed Flow Mfp E6750 Firmware Color Laserjet Managed Flow Mfp E67560 Firmware Color Laserjet Managed Mfp E77830 Firmware Color Laserjet Managed Mfp E87660 Firmware Color Laserjet Managed Flow Mfp E87660 Firmware Color Laserjet Managed Mfp M577 Firmware Color Laserjet Managed Flow Mfp M577 Firmware Color Laserjet Managed Mfp M680 Firmware Color Laserjet Managed Flow Mfp M680 Firmware Laserjet Enterprise 500 Color M551 Firmware Laserjet Enterprise Flow Mfp M525 Firmware Laserjet Enterprise 500 Color Mfp M575 Firmware Laserjet Enterprise Color Flow Mfp M575 Firmware Laserjet Enterprise 600 M603 Firmware Color Laserjet Managed Mfp M775 Firmware Laserjet Enterprise 700 M712 Firmware Laserjet Enterprise Flow Mfp M630 Firmware Laserjet Managed Flow Mfp M630 Firmware Laserjet Enterprise Flow Mfp M830 Firmware Laserjet Managed Flow Mfp M830 Firmware Laserjet Managed M506 Firmware Laserjet Managed M605 Firmware Laserjet Enterprise M607 Firmware Laserjet Enterprise M608 Firmware Laserjet Enterprise M609 Firmware Laserjet Enterprise Flow Mfp M527Z Firmware Laserjet Managed Mfp M630 Firmware Laserjet Enterprise Mfp M631 Firmware Laserjet Enterprise Flow Mfp M631 Firmware Laserjet Enterprise Mfp M632 Firmware Laserjet Enterprise Flow Mfp M632 Firmware Laserjet Enterprise Mfp M633 Firmware Laserjet Enterprise Flow Mfp M633 Firmware Laserjet Managed Mfp M725 Firmware Laserjet Managed 500 Mfp M525 Firmware Laserjet Managed Flow Mfp M525 Firmware Laserjet Managed 500 Color Mfp M575 Firmware Laserjet Managed Color Flow Mfp M575 Firmware Laserjet Managed E50045 Firmware Laserjet Managed Mfp E52545 Firmware Laserjet Managed E60055 Firmware Laserjet Managed E60065 Firmware Laserjet Managed E60075 Firmware Laserjet Managed Mfp E62555 Firmware Laserjet Managed Mfp E62565 Firmware Laserjet Managed Flow Mfp E62555 Firmware Laserjet Managed Flow Mfp E62565 Firmware Laserjet Managed Flow Mfp E62575 Firmware Laserjet Managed Mfp E72535 Firmware Laserjet Managed Flow Mfp E72535 Firmware Laserjet Managed Mfp E82560 Firmware Laserjet Managed Flow Mfp E82560 Firmware Laserjet Managed Mfp M527 Firmware Laserjet Managed Flow Mfp M527Z Firmware Officejet Managed Color Flow Mfp X585 Firmware Officejet Managed Color Mfp X585 Firmware Officejet Enterprise Color X555 Firmware Pagewide Color 755 Firmware Pagewide Color Mfp 774 Firmware Pagewide Color Mfp 779 Firmware Pagewide Enterprise Color 556 Firmware Pagewide Enterprise Color 765 Firmware Pagewide Enterprise Color Mfp 586 Firmware Pagewide Enterprise Color Mfp 780 Firmware Pagewide Enterprise Color Flow Mfp 780F Firmware Pagewide Enterprise Color Flow Mpf 785 Firmware Pagewide Managed Color E55650 Firmware Pagewide Managed Color E75160 Firmware Pagewide Managed Color P75250 Firmware Pagewide Managed Color Mfp P77440 Firmware Pagewide Managed Color Mfp E77650 Firmware Pagewide Managed Color Flow Mfp E77650 Firmware Pagewide Managed Color Mfp P77940 Firmware Pagewide Managed Color Mfp P77950 Firmware Pagewide Managed Color Mfp P77960 Firmware Scanjet Enterprise 8500 Fn1 Document Capture Workstation Firmware Scanjet Enterprise Flow N9120 Fn2 Document Scanner Firmware
9.8
CVSS 3.0 · NVD
View

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A04:2025 - Cryptographic Failures
ASVS 5.0
V11 - Cryptography Signature verification
Impact

CVSS score of 9.8 (CRITICAL). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required.

Exploit ScenarioDerived

This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the critical-severity affected system.

Act Now Prioritize within 24-48h. Why: CRITICAL severity.
No patch listed yet 2.6% exploitation probability (EPSS)

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AnalysisAI

HP LaserJet Enterprise printers, HP PageWide Enterprise printers, HP LaserJet Managed printers, HP Officejet Enterprise printers have an insufficient solution bundle signature validation that. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified under CWE-347. HP LaserJet Enterprise printers, HP PageWide Enterprise printers, HP LaserJet Managed printers, HP Officejet Enterprise printers have an insufficient solution bundle signature validation that potentially allows execution of arbitrary code. Affected products include: Hp Color Laserjet Cm4540 Mfp Firmware, Hp Color Laserjet Enterprise Cp5525 Firmware, Hp Color Laserjet Enterprise M553 Firmware, Hp Color Laserjet Enterprise M552 Firmware, Hp Color Laserjet Managed M553 Firmware.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 9.8 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

DescriptionNVD

HP LaserJet Enterprise printers, HP PageWide Enterprise printers, HP LaserJet Managed printers, HP Officejet Enterprise printers have an insufficient solution bundle signature validation that potentially allows execution of arbitrary code.

Threat Intelligence Overview

EPSS Score
2.6%
Top 16% exploitable
Data Quality
2 sources
Confidence: Low

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity CRITICAL
CISA KEV No
Public POC No
EPSS 2.6%
Patch available No
Active threat No
Deciding rule
CRITICAL severity
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
Yes
Human Impact· derived
Medium

Priority Score

52
Low Medium High Critical
KEV: 0
EPSS: +3
CVSS: +49
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.

Affected Products (CPE)NVD

cpe:2.3:o:hp:color_laserjet_cm4540_mfp_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_enterprise_cp5525_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_enterprise_m553_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_enterprise_m552_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_enterprise_m552_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_managed_m553_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_managed_m553_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_enterprise_m651_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_enterprise_m651_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_managed_m651_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_managed_m651_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_enterprise_m652_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_enterprise_m653_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_enterprise_m750_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_enterprise_m855_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_enterprise_m855_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_enterprise_mfp_m577_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_enterprise_mfp_m577_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_enterprise_flow_mfp_m577_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:color_laserjet_enterprise_flow_mfp_m577_firmware:*:*:*:*:*:*:*:*
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