EUVD-2026-75085Severity by source
AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Adjacent vector confirmed by SNMP protocol scope; PR:N as no auth needed; C:L for partial heap disclosure; I:N and A:N as only a read is established.
Primary rating from Vendor (redhat).
CVSS VectorVendor: redhat
Lifecycle Timeline
3DescriptionCVE.org
The cupsUTF32ToUTF8() function in CUPS's cups/transcode.c lacks a source-length bound and can read past the end of the source buffer, resulting in a heap out-of-bounds read. This is reachable via SNMP supply-description parsing in backend/snmp-supplies.c with attacker-controlled content.
AnalysisAI
Heap out-of-bounds read in CUPS's cupsUTF32ToUTF8() transcoding function exposes partial daemon heap memory to adjacent-network attackers without authentication. The vulnerable code path is reachable via SNMP supply-description parsing, meaning any attacker who can spoof or inject crafted SNMP responses on the same network segment as a CUPS host can trigger the read and potentially leak heap contents from the printing daemon. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | CUPS must be actively performing SNMP-based printer discovery - the snmp backend must be present and active in the CUPS configuration (not disabled). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 score of 4.3 (AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N) accurately characterizes this as a moderate, confidentiality-only issue confined to adjacent network segments. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply vendor-released patches via Red Hat advisory (https://access.redhat.com/security/cve/CVE-2026-87875) and the upstream OpenPrinting fix referenced in GHSA-559w-7676-3xrq; exact patched CUPS version numbers are not confirmed from the provided data and should be verified against the upstream advisory. … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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