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CVE-2026-69356

Status: AnalyzedCritical (9.3)—

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.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

🎯 ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

CWE-79 (XSS) en Exchange Server web con CVSS AV:N UI:R. XSS es T1189 (drive-by). No hay código remoto comprobado, solo spoofing.

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

🛡️ ATT&CK mitigations that cover these techniques

User TrainingRestrict Web-Based ContentApplication Isolation and SandboxingExploit ProtectionUpdate Software

Affected technologies (2)

Microsoft — Exchange ServerMicrosoft — Exchange Server Subscription Edition

CWEs

References

Raw JSON (NVD)

Show
{
  "id": "CVE-2026-69356",
  "cveTags": [],
  "metrics": {
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          "role": "CISA Coordinator",
          "options": [
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              "exploitation": "none"
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              "automatable": "no"
            },
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              "technicalImpact": "total"
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          "version": "2.0.3",
          "timestamp": "2026-09-10T14:18:13.298871Z"
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  "published": "2026-09-08T18:18:55.060",
  "references": [
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      "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69356",
      "tags": [
        "Patch",
        "Vendor Advisory"
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      "source": "secure@microsoft.com"
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  ],
  "vulnStatus": "Analyzed",
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    }
  ],
  "lastModified": "2026-09-30T12:29:48.747",
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