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High 7.8Published Oct 13, 2026

CVE-2026-87695Microsoft Exchange Server Elevation of Privilege Vulnerability

Updated under an hour ago ()

Does this affect you?

It affects Microsoft Exchange Server 2016 Cumulative Update 23 and 5 other products. Add what you run to find out whether that includes you.

EPSS puts the chance of exploitation in the next 30 days at 0.30%, higher than 22% of scored CVEs.

Inclusion of functionality from untrusted control sphere in Microsoft Exchange Server allows an authorized attacker to elevate privileges locally.

CVSS
7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Weakness (CWE)
CWE-829
Known exploited
Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days)
0.30% (percentile 22)
Assigned by
microsoft
NVD analysis
Analyzed
Record last updated
Oct 27, 2026
First seen by InfoSec Signals
Oct 13, 2026

Affected products

Affected products
Microsoft Microsoft Exchange Server 2016 Cumulative Update 23
microsoft:exchange_server_2016_cumulative_update_23 (from the name)
from 15.01.0.0 before 15.01.2507.077
CNA record
Microsoft Microsoft Exchange Server 2019 Cumulative Update 14
microsoft:exchange_server_2019_cumulative_update_14 (from the name)
from 15.02.0.0 before 15.02.1544.050
CNA record
Microsoft Microsoft Exchange Server 2019 Cumulative Update 15
microsoft:exchange_server_2019_cumulative_update_15 (from the name)
from 15.02.0.0 before 15.02.1748.055
CNA record
Microsoft Microsoft Exchange Server Subscription Edition RTM
microsoft:exchange_server_subscription_edition_rtm (from the name)
from 15.02.0.0 before 15.02.2562.056
CNA record
microsoft exchange_server
microsoft:exchange_server
2016; 2019; 2019
NVD
microsoft exchange_server_subscription_edition
microsoft:exchange_server_subscription_edition
before 15.02.2562.056
NVD

References

References

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.

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