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CVE-2026-69355high8.8

Microsoft Exchange Server Remote Code Execution Vulnerability

Impact

Microsoft Exchange Server has a vulnerability that allows an authorized attacker to execute code. The affected versions are Microsoft Exchange Server 2016 Cumulative Update 23, Microsoft Exchange Server 2019 Cumulative Update 14 and 15, and Microsoft Exchange Server Subscription Edition RTM. The weakness is external control of file name or path.

Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.

Affected packages

This source has no supported package-version data for matching. You can read the advisory here, but this record alone cannot power a dependency check.

Affected products

Vendor version evidence. Product records are separate from automatic dependency matching.

Microsoft · microsoft

Microsoft Exchange Server 2016 Cumulative Update 23

1 range
microsoft version evidence
Platforms: x64-based Systems

Compare with this publisher’s ranges. This does not inspect your installation.

affected

15.01.0.0 → before 15.01.2507.073

custom versions

unaffected

unknown

Other versions: unknown

Microsoft · microsoft

Microsoft Exchange Server 2019 Cumulative Update 14

1 range
microsoft version evidence
Platforms: x64-based Systems

Compare with this publisher’s ranges. This does not inspect your installation.

affected

15.02.0.0 → before 15.02.1544.046

custom versions

unaffected

unknown

Other versions: unknown

Microsoft · microsoft

Microsoft Exchange Server 2019 Cumulative Update 15

1 range
microsoft version evidence
Platforms: x64-based Systems

Compare with this publisher’s ranges. This does not inspect your installation.

affected

15.02.0.0 → before 15.02.1748.051

custom versions

unaffected

unknown

Other versions: unknown

Microsoft · microsoft

Microsoft Exchange Server Subscription Edition RTM

1 range
microsoft version evidence
Platforms: x64-based Systems

Compare with this publisher’s ranges. This does not inspect your installation.

affected

15.02.0.0 → before 15.02.2562.049

custom versions

unaffected

unknown

Other versions: unknown

Original source description

External control of file name or path in Microsoft Exchange Server allows an authorized attacker to execute code over a network.

Inside the record

Evidence available

Package identity · not supplied
Version evidence
Remediation guidance · not supplied
Weakness classification
Additional publishers

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-69355

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Underlying weaknesses

The source’s classification of what caused the vulnerability.

CWE-73 ↗

CWE-73: External Control of File Name or Path

microsoft

Related →

Environment requirements

These conditions apply together as specified by the publisher. A matching product name alone does not establish exposure.

microsoft · platform conditions

Any condition may hold

Vulnerable product

cpe:2.3:a:microsoft:exchange_server_2019:*:cumulative_update_15:*:*:*:*:*:*

From (inclusive): 15.02.0.0

Before: 15.02.1748.051

Vulnerable product

cpe:2.3:a:microsoft:exchange_server_2019:*:cumulative_update_14:*:*:*:*:*:*

From (inclusive): 15.02.0.0

Before: 15.02.1544.046

Vulnerable product

cpe:2.3:a:microsoft:exchange_server_2016:*:cumulative_update_23:*:*:*:*:*:*

From (inclusive): 15.01.0.0

Before: 15.01.2507.073

Vulnerable product

cpe:2.3:a:microsoft:exchange_server_se:*:RTM:*:*:*:*:*:*

From (inclusive): 15.02.0.0

Before: 15.02.2562.049

Original applicability statements
[
  {
    "nodes": [
      {
        "operator": "OR",
        "negate": false,
        "cpeMatch": [
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:a:microsoft:exchange_server_2019:*:cumulative_update_15:*:*:*:*:*:*",
            "versionStartIncluding": "15.02.0.0",
            "versionEndExcluding": "15.02.1748.051"
          },
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:a:microsoft:exchange_server_2019:*:cumulative_update_14:*:*:*:*:*:*",
            "versionStartIncluding": "15.02.0.0",
            "versionEndExcluding": "15.02.1544.046"
          },
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:a:microsoft:exchange_server_2016:*:cumulative_update_23:*:*:*:*:*:*",
            "versionStartIncluding": "15.01.0.0",
            "versionEndExcluding": "15.01.2507.073"
          },
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:a:microsoft:exchange_server_se:*:RTM:*:*:*:*:*:*",
            "versionStartIncluding": "15.02.0.0",
            "versionEndExcluding": "15.02.2562.049"
          }
        ]
      }
    ]
  }
]
Contributing organizations · 2
microsoft

Assigning organization

2026-10-30
CISA-ADP

Additional data publisher

2026-09-09

What changed

Follow changes
No substantive changes have been recorded here yet. History starts when cve.new observes a change after tracking is enabled; earlier edits are not reconstructed.

Large field values are marked as truncated previews. Original source snapshots remain retained.

References

1 sources
msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69355
vendor-advisorymicrosoft