UpHeron
All vulnerabilities

Servers and applications

CVE-2026-87696

Improper verification of cryptographic signature in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.

Severity
High 7.5
Published
13 Oct 2026
Last changed
27 Oct 2026
Added to UpHeron
1 Nov 2026
Fixed in
15.02.2562.056
Sources
NVD

Affected software

SoftwareAffected versions
Microsoft Exchange ServerServers and applications · cpe:a:microsoft:exchange_server
  • Version 2016-cumulative_update_23
  • Version 2019-cumulative_update_14
  • Version 2019-cumulative_update_15
Microsoft Exchange ServerServers and applications · cpe:a:microsoft:exchange_server_subscription_edition
  • Every version before 15.02.2562.056

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2026-87696
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-87696