Vulnerability Intelligence Report
Microsoft Exchange Server Spoofing Vulnerability
CVE-2026-70279
Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.
Cross-Site Scripting (XSS)
No Active Exploit Signals
CVSS Base Score
9.3
CRITICAL
Exploitability:2.9
Impact Score:5.8
EPSS Probability:0.86%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-79 ↗CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Microsoft | Microsoft Exchange Server 2016 Cumulative Update 23 | 15.01.0.0 < 15.01.2507.077 (affected) |
| Microsoft | Microsoft Exchange Server 2019 Cumulative Update 14 | 15.02.0.0 < 15.02.1544.050 (affected) |
| Microsoft | Microsoft Exchange Server 2019 Cumulative Update 15 | 15.02.0.0 < 15.02.1748.055 (affected) |
| Microsoft | Microsoft Exchange Server Subscription Edition RTM | 15.02.0.0 < 15.02.2562.056 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Microsoft Corporation · Vendor · USA |
| Reserved | 2026-08-03T23:58:13 |
| Published | 2026-10-13T19:01:10 |
| Patch Date | 2026-10-13 |
| Last Updated | 2026-10-14T17:57:59 |
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