CVE-2026-42897 (GCVE-0-2026-42897)

Vulnerability from cvelistv5 – Published: 2026-05-14 17:00 – Updated: 2026-05-14 18:09
VLAI?
Title
Microsoft Exchange Server Spoofing Vulnerability
Summary
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.
Severity ?
8.1 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N/E:F/RL:O/RC:C
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
Impacted products
Date Public ?
2026-05-14 14:00
Show details on NVD website
To clipboard 

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        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Microsoft Exchange Server 2016 Cumulative Update 23",
          "vendor": "Microsoft",
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            }
          ]
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          ],
          "product": "Microsoft Exchange Server 2019 Cumulative Update 14",
          "vendor": "Microsoft",
          "versions": [
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              "status": "affected",
              "version": "-"
            }
          ]
        },
        {
          "platforms": [
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          ],
          "product": "Microsoft Exchange Server 2019 Cumulative Update 15",
          "vendor": "Microsoft",
          "versions": [
            {
              "status": "affected",
              "version": "-"
            }
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        },
        {
          "platforms": [
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          ],
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      "descriptions": [
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      "problemTypes": [
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      "providerMetadata": {
        "dateUpdated": "2026-05-14T18:09:08.749Z",
        "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
        "shortName": "microsoft"
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          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42897"
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    "datePublished": "2026-05-14T17:00:36.515Z",
    "dateReserved": "2026-04-30T22:35:54.967Z",
    "dateUpdated": "2026-05-14T18:09:08.749Z",
    "state": "PUBLISHED"
  },
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  "vulnerability-lookup:meta": {
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  }
}


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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.