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Fencer Intel
medium 5.4

CVE-2018-8153 json

A spoofing vulnerability exists in Microsoft Exchange Server when Outlook Web Access (OWA) fails to properly handle web requests, aka "Micr…

published 2018-05-09 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-19824

cvss
5.4
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.4%
EPSS 3.4% chance of exploitation in 30 days, percentile 89%
public exploits
0
none known

Summary

A spoofing vulnerability exists in Microsoft Exchange Server when Outlook Web Access (OWA) fails to properly handle web requests, aka "Microsoft Exchange Spoofing Vulnerability." This affects Microsoft Exchange Server.

Patch / fix

Exploit prediction

3.44% chance of exploitation in the next 30 days, higher than 89% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 5.4 CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
NVD 2.0 5.8 AV:N/AC:M/Au:N/C:P/I:P/A:N

Affected products

  • Microsoft Microsoft Exchange Server

Classification

Weakness
  • CWE-290 Authentication Bypass by Spoofing
Technology feeds

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.