CVE-2026-8631Network attack vector

Unauthenticated code execution via hpcups size overflow

Published May 20, 2026 · Updated May 20, 2026

Heap-based buffer overflow in HP Linux Imaging and Printing before 3.26.4 allows remote attackers to execute arbitrary code via crafted print data. The hpcups filter multiplies several input-controlled values to size a heap buffer without proving that the product fits, allowing a subsequent raster write to exceed the allocation. No authentication or user interaction is required when an attacker can submit a job to a CUPS queue using hpcups; successful corruption grants code execution in the filter's security context.

CVSS severity9.3
Critical
EPSS probability1.81%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer overflow in HP Linux Imaging and Printing before 3.26.4 allows remote attackers to execute arbitrary code via crafted print data. The hpcups filter multiplies several input-controlled values to size a heap buffer without proving that the product fits, allowing a subsequent raster write to exceed the allocation. No authentication or user interaction is required when an attacker can submit a job to a CUPS queue using hpcups; successful corruption grants code execution in the filter's security context.

The record

CVE
CVE-2026-8631
Published
May 20, 2026
Updated
May 20, 2026
Vendor
Plantronics
Product
HP Linux Imaging and Printing
Classifications
CWE-190, CWE-122, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 20, 2026CVE publishedPublication date reported by the CVE source.
  2. May 20, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <3.26.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Plantronics · HP Linux Imaging and Printingversion=0 <3.26.4

Published CVSS scores

9.3HP Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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

CWE-190Integer Overflow or Wraparound
CWE-122Heap-based Buffer Overflow
T1190Exploit Public-Facing Application

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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