CVE-2026-34348: Protection mechanism failure in Windows Event Logging Service allows an authorized attacker to disclose information over a network.

mediumCVSS 6.5CVE-2026-34348

Protection mechanism failure in Windows Event Logging Service allows an authorized attacker to disclose information over a network.

Details

Source: NVD Recent CVEs (US · database · site)
Severity: medium — CVSS 6.5
Published: 2026-07-14
Last updated: 2026-07-16
Exploitation: Not in CISA KEV at last sync

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-34348

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-2026-343480.71% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 50% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-34348	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

unknownexploitedNCSC-2026-0231 [1.00] [M/H] Vulnerabilities fixed in Microsoft Windowsncsc-nl
mediumCVE-2026-34348: Windows Event Logging Service Information Disclosure Vulnerabilitymsrc

Recent advisories for Protection mechanism failure

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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highCVE-2026-50646: Protection mechanism failure in .NET Framework allows an unauthorized attacker to execute code…nvd · 2026-07-14
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