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CVE-2026-56191

🗓️ 24 Jul 2026 00:01:12Reported by microsoftType 
cve
 cve
🔗 web.nvd.nist.gov👁 158 Views

CVE-2026-56191 describes a tampering vulnerability in Microsoft Exchange Online.

Related
Detection
Affected
Refs
ReporterTitlePublishedViews
Family
attackerkb
ATTACKERKB
CVE-2026-56191
24 Jul 202600:01
attackerkb
circl
Circl
CVE-2026-56191
24 Jul 202600:26
circl
cvelist
Cvelist
CVE-2026-56191 Microsoft Exchange Online Tampering Vulnerability
24 Jul 202600:01
cvelist
euvd
EUVD
EUVD-2026-48458
24 Jul 202600:01
euvd
kaspersky
Kaspersky
KLA91178 SUI vulnerability in Microsoft Server Software
23 Jul 202600:00
kaspersky
mscve
Microsoft CVE
Microsoft Exchange Online Tampering Vulnerability
23 Jul 202614:00
mscve
nvd
NVD
CVE-2026-56191
24 Jul 202601:17
nvd
ptsecurity
Positive Technologies
PT-2026-64208
24 Jul 202600:00
ptsecurity
vulnrichment
Vulnrichment
CVE-2026-56191 Microsoft Exchange Online Tampering Vulnerability
24 Jul 202600:01
vulnrichment
NVD
CNA
[
  {
    "vendor": "Microsoft",
    "product": "Microsoft Exchange Online",
    "versions": [
      {
        "version": "-",
        "status": "affected"
      }
    ]
  }
]

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14 Aug 2026 17:26Current
5.3Medium risk
Vulners AI Score5.3
CVSS 3.110
EPSS0.00667
SSVC
158