CVE-2026-34980Public exploit

Unauthenticated code execution via injected PPD control record

Published Apr 3, 2026 · Updated Apr 3, 2026

Code injection in CUPS 2.4.16 and earlier allows remote attackers to execute an existing binary as lp through a shared PostScript queue. A newline in the page-border value survives option escaping, becomes a trusted PPD control record, and inserts an attacker-selected cupsFilter2 path. Exploitation requires network access to an anonymously writable shared PostScript queue using the legacy PPD path; a second raw job triggers lp-level execution.

CVSS severity6.1
Medium
EPSS probability0.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in CUPS 2.4.16 and earlier allows remote attackers to execute an existing binary as lp through a shared PostScript queue. A newline in the page-border value survives option escaping, becomes a trusted PPD control record, and inserts an attacker-selected cupsFilter2 path. Exploitation requires network access to an anonymously writable shared PostScript queue using the legacy PPD path; a second raw job triggers lp-level execution.

The record

CVE
CVE-2026-34980
Published
Apr 3, 2026
Updated
Apr 3, 2026
Vendor
OpenPrinting
Product
CUPS
Classifications
CWE-20, T1210
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 3, 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=<= 2.4.16

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

OpenPrinting · CUPSversion=<= 2.4.16

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
6.1GitHub, Inc.CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-20Improper Input Validation
T1210Exploitation of Remote Services

Public exploit references

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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