CVE-2026-69382

Microsoft Exchange Server Information Disclosure Vulnerability

Products / packages Microsoft Exchange Server 2016 Cumulative Update 23 · Microsoft Exchange Server 2019 Cumulative Update 14 · Microsoft Exchange Server 2019 Cumulative Update 15 · 1 more

Published 08/09/2026, 17:12:48 UTC

Severity and exploitation

Not in CISA KEV

KEV coverage does not rule out exploitation.

KEV checked 15/11/2026, 03:10:34 UTC

microsoft · CVSS:3.1 · 5.9

Assessment vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C

Severity

medium5.9

CVSS measures technical severity, not the likelihood of an attack.

Known exploitation

Not listed in the checked CISA KEV catalog

Absence from CISA KEV does not rule out attacks.

Public exploit

Not established by this record

Missing evidence does not mean no public exploit exists.

Remediation

Fix status not established

No structured fix or guidance is available here. Check the latest publisher advisory.

What this means

Microsoft Exchange Server versions 2016 Cumulative Update 23, 2019 Cumulative Update 14 and 15, and Subscription Edition RTM are affected by a vulnerability that allows an unauthorized attacker to disclose information over a network due to the use of a broken or risky cryptographic algorithm. The affected versions are less than 15.01.2507.073 for 2016, less than 15.02.1544.046 and 15.02.1748.051 for 2019, and less than 15.02.2562.049 for Subscription Edition RTM. An attacker can exploit this vulnerability to disclose information.

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

Attack conditions

No attack-condition excerpt has been identified here. Review the full source description and references for authentication, network access, and configuration requirements.

Review supporting sources →

Affected versions

Check the exact model, release, and any platform requirements against your installation.

Microsoft · microsoft

Microsoft Exchange Server 2016 Cumulative Update 23

1 range

microsoft version evidence

Platforms: x64-based Systems

Check a product version

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

affected

15.01.0.0 → before 15.01.2507.073

custom versions

Other versions: unknown

Microsoft · microsoft

Microsoft Exchange Server 2019 Cumulative Update 14

1 range

microsoft version evidence

Platforms: x64-based Systems

Check a product version

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

affected

15.02.0.0 → before 15.02.1544.046

custom versions

Other versions: unknown

Microsoft · microsoft

Microsoft Exchange Server 2019 Cumulative Update 15

1 range

microsoft version evidence

Platforms: x64-based Systems

Check a product version

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

affected

15.02.0.0 → before 15.02.1748.051

custom versions

Other versions: unknown

Microsoft · microsoft

Microsoft Exchange Server Subscription Edition RTM

1 range

microsoft version evidence

Platforms: x64-based Systems

Check a product version

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

affected

15.02.0.0 → before 15.02.2562.049

custom versions

Other versions: unknown

Automatic dependency matching is unavailable for this record. Use the product evidence and publisher’s instructions to check your installation.

What to do

Compare your installed product and version with the affected versions above. A matching product name alone does not confirm exposure.

No structured fix or remediation guidance is available here. Check the full source description and vendor’s latest advisory for a patch or workaround; do not assume another version is safe.

cve.new guidance unless attributed to a publisher. This page does not inspect your installation.

Public exploit evidence

No public exploit reference is identified in the imported evidence. This is not a claim that no exploit exists.

Original source description

Read the full publisher description

Use of a broken or risky cryptographic algorithm in Microsoft Exchange Server allows an unauthorized attacker to disclose information over a network.

References

1 sources

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69382

Vendor advisorymicrosoft

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-2026-69382

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-327 ↗

CWE-327: Use of a Broken or Risky Cryptographic Algorithm

microsoft

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

After:

Through (inclusive):

Before: 15.02.1748.051

Vulnerable product

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

From (inclusive): 15.02.0.0

After:

Through (inclusive):

Before: 15.02.1544.046

Vulnerable product

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

From (inclusive): 15.01.0.0

After:

Through (inclusive):

Before: 15.01.2507.073

Vulnerable product

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

From (inclusive): 15.02.0.0

After:

Through (inclusive):

Before: 15.02.2562.049

Applicability preview

[
  {
    "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

2026-11-10

CISA-ADP

Additional data publisher

2026-09-08

Timeline

All times UTC

8 Sept 2026, 17:12
Advisory published
Publication date supplied by the source.
10 Nov 2026, 21:31
Source updated
Latest modification date supplied by the source.
11 Nov 2026, 02:41
Last imported by cve.new
Latest catalog import, not the date we first saw this advisory.

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.

Reading the signals

Severity · CVSS: Technical impact and attack conditions. The headline is the highest imported catalog score; sources may disagree.
Observed exploitation · KEV: An absent or unavailable KEV listing does not establish that exploitation has not occurred.
Predicted exploitation · EPSS: 0.47% estimated probability in the next 30 days. 2026-11-13 · FIRST EPSS.

CISA-ADP · SSVC

CISA Coordinator · 2026-09-08

Exploitation: none
Automatable: no
Technical Impact: partial

SSVC describes the publisher’s decision context. Your organization’s exposure and priorities may differ.

Record identifiers

Aliases: None recorded

Source evidence

Request a correction or dispute

Start with the assigning organization for this record. Include the CVE ID, the disputed information, and supporting evidence. A dispute does not itself reject a record.

Find the responsible CNA →Official dispute and escalation process ↗

CVE CVE-2026-69382

Enrichment coverage

NVDRefresh failed

Previous evidence retained where available.

GHSAAvailable

Checked 14/11/2026, 12:20:34 UTC

EUVDAvailable

Checked 14/11/2026, 12:15:37 UTC

EPSSAvailable

Checked 14/11/2026, 12:10:35 UTC

Additional source evidence

FIRST EPSS · CVE-2026-69382

EPSS 0.47% probability of exploitation in the next 30 days. Percentile: 41.26% · 2026-11-13

Checked 14/11/2026, 12:10:35 UTC

ENISA EUVD · EUVD-2026-73130

CVSS 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C

Checked 14/11/2026, 12:15:37 UTC

GitHub Advisory Database · GHSA-39fx-jcrv-m48p

CVSS 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Checked 14/11/2026, 12:20:34 UTC

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Investigate in your agent.

Microsoft Exchange Server Information Disclosure Vulnerability

Severity and exploitation

What this means

Attack conditions

Affected versions

Microsoft Exchange Server 2016 Cumulative Update 23

affected

unaffected

unknown

Microsoft Exchange Server 2019 Cumulative Update 14

affected

unaffected

unknown

Microsoft Exchange Server 2019 Cumulative Update 15

affected

unaffected

unknown

Microsoft Exchange Server Subscription Edition RTM

affected

unaffected

unknown

What to do

Public exploit evidence

Original source description

References

Inside the record

Evidence available

Original records

Underlying weaknesses

Environment requirements

Timeline

Advisory published

Source updated

Last imported by cve.new

What changed