CVE-2026-87876: Cups: openprinting cups: remaining case-insensitive username matching in scheduler side paths (cve-2026-27447 follow-up)

Details

Source

Microsoft Security Response Center (INTL · vendor-psirt · site)

Severity

low — CVSS 3

Published

2026-09-08

Exploitation

Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-87876

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

• Low exploitation riskCVE-2026-878760.39% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 32% of all EPSS-scored CVEs.

Referenced CVEs

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

• low[UPDATE] [niedrig] CUPS: Mehrere Schwachstellen ermöglichen Offenlegung von Informationencert-bund
• lowCVE-2026-87876: Two case-insensitive comparisons on request-derived usernames outside the main authorization p…nvd

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