8.8

CVE-2026-88164: microsoft microsoft sharepoint server subscription edition Missing Authorization

CVSS: 8.8v3.1HighAwaiting analysis
Published 14-10-2026Last modified 19-10-2026
Open JSON

Vulnerability summary

CVE-2026-88164 is a high (CVSS 8.8) Missing Authorization vulnerability in microsoft microsoft sharepoint server subscription edition. EPSS estimates a 0.74% chance of exploitation in the next 30 days, higher than 53.8% of scored vulnerabilities.

Overall risk
35/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.74%
0%100%
Low · Change unavailable
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 14-10-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

Description

Missing authorization in Microsoft Office SharePoint allows an authorized attacker to elevate privileges over a network.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.74%

Chance of exploitation in the next 30 days

Percentile

54%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

15-10-202619-10-2026
EPSS score
0.74%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Microsoft1 product

1 vendor · 1 product

References

1 links