vulntracker.iovulntracker.io
© 2026 vulntracker.io

CVE-2026-62911

Microsoft Exchange Server Elevation of Privilege Vulnerability

HIGH
8
CVSS Score
Published: August 11, 2026 at 05:06 PM UTC
Updated: October 30, 2026 at 05:22 PM UTC
2 products affected across 1 vendorExchange ServerExchange Server Subscription Edition

Using Microsoft Exchange Server 2016 Cumulative Update 23 by Microsoft?

Get instant alerts when new vulnerabilities affect Microsoft Exchange Server 2016 Cumulative Update 23 - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Start FreeSign In
Severity
HIGH8
Exploit prediction
EPSS 0.7%
SSVC
PoC

Description

Authentication bypass by capture-replay in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Exchange Server· Microsoft
95%
15.01.0.015.02.0.020162016 cumulative_update_12016 cumulative_update_102016 cumulative_update_112016 cumulative_update_122016 cumulative_update_132016 cumulative_update_142016 cumulative_update_152016 cumulative_update_162016 cumulative_update_172016 cumulative_update_182016 cumulative_update_192016 cumulative_update_22016 cumulative_update_202016 cumulative_update_212016 cumulative_update_222016 cumulative_update_32016 cumulative_update_42016 cumulative_update_52016 cumulative_update_62016 cumulative_update_72016 cumulative_update_82016 cumulative_update_920192019 cumulative_update_12019 cumulative_update_102019 cumulative_update_112019 cumulative_update_122019 cumulative_update_132019 cumulative_update_22019 cumulative_update_32019 cumulative_update_42019 cumulative_update_52019 cumulative_update_62019 cumulative_update_72019 cumulative_update_82019 cumulative_update_9
Affected range stops below 15.01.2507.072, so it looks safe — our inference, not a vendor statement
Affected range stops below 15.02.1544.044, so it looks safe — our inference, not a vendor statement
Affected range stops below 15.02.1748.049, so it looks safe — our inference, not a vendor statement
Exchange Server Subscription Edition· Microsoft
95%
v < 15.02.2562.04615.02.0.0
Affected range stops below 15.02.2562.046, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

Vendor AdvisoryPatch
Source: cverecord
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62911
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
https://github.com/hypnguyen1209/CVE-2026-62911

SSVC — Action Prioritization

SSVCPoCNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-294

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create accountSign in
Free plan, no card