CVE-2026-42626Network attack vector

Persistent printer hang via unbounded print sessions

Published May 22, 2026 · Updated May 22, 2026

Resource exhaustion in HP ENVY 5000 series firmware VERBASPP1N003.2237A.00 allows remote attackers to hang the printer via port 9100. The JetDirect/RAW printing service retains persistent TCP sessions without a connection timeout or concurrency limit, leaving session threads locked in a waiting state. Same-network access is sufficient to block all print jobs and user commands until a manual restart, after which the attack can resume.

CVSS severityUnavailable
Unscored
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in HP ENVY 5000 series firmware VERBASPP1N003.2237A.00 allows remote attackers to hang the printer via port 9100. The JetDirect/RAW printing service retains persistent TCP sessions without a connection timeout or concurrency limit, leaving session threads locked in a waiting state. Same-network access is sufficient to block all print jobs and user commands until a manual restart, after which the attack can resume.

The record

CVE
CVE-2026-42626
Published
May 22, 2026
Updated
May 22, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 22, 2026CVE publishedPublication date reported by the CVE source.
  2. May 22, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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