CVE-2026-49174: Missing authentication for critical function in Microsoft Windows DNS allows an authorized attacker to perform tampering locally.

mediumCVSS 6.1CVE-2026-49174

Missing authentication for critical function in Microsoft Windows DNS allows an authorized attacker to perform tampering locally.

Details

Source: NVD Recent CVEs (US · database · site)
Severity: medium — CVSS 6.1
Published: 2026-07-14
Last updated: 2026-07-20
Exploitation: Not in CISA KEV at last sync

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-49174

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-2026-491740.20% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 10% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-49174	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-2026-49174: DNS Client Tampering Vulnerabilitymsrc

Recent advisories for Missing authentication for

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.

unknownCVE-2026-15227: Missing authorization in Checkmk <2.5.0p10, <2.4.0p35, <2.3.0p49, and 2.2.0 (EOL) allows an au…nvd · 2026-07-31
criticalCVE-2026-67594: Spikster through commit e1cdf8c contains a missing authentication vulnerability that allows un…nvd · 2026-07-30
highCVE-2026-12722: Missing authentication for critical function vulnerability in FTC Software IT Services FTC E-C…nvd · 2026-07-30
criticalCVE-2026-44101: Due to missing authentication the CHARX OCPP Agent service allows an unauthenticated remote at…nvd · 2026-07-30
criticalCVE-2026-44090: Due to missing authentication, an unauthenticated remote attacker may access the MQTT broker, …nvd · 2026-07-30
highCVE-2026-5057: ATEN Unizon RpcProvider Missing Authentication Denial-of-Service Vulnerability. This vulnerabil…nvd · 2026-07-29