CVE-2026-118708

Microsoft Office Excel Remote Code Execution Vulnerability

Products / packages Microsoft 365 Apps for Enterprise · Microsoft Office 365 for Mac · Microsoft Office LTSC 2021 · 4 more

Published 10/11/2026, 18:24:53 UTC

Severity and exploitation

Not in CISA KEV

KEV coverage does not rule out exploitation.

KEV checked 14/11/2026, 22:45:30 UTC

microsoft · CVSS:3.1 · 8.8

Assessment vector

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

Severity

high8.8

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 Office Excel has a release of invalid pointer or reference weakness, affecting versions including 16.0.1 of Microsoft 365 Apps for Enterprise and Microsoft Office LTSC 2021. An attacker may exploit this.

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 365 Apps for Enterprise

1 range

microsoft version evidence

Platforms: 32-bit Systems, x64-based Systems

Check a product version

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

affected

16.0.1 → before https://aka.ms/OfficeSecurityReleases

custom versions

Other versions: unknown

Microsoft · microsoft

Microsoft Office 365 for Mac

1 range

microsoft version evidence

Check a product version

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

affected

1.0.0 → before 16.115.26110837

custom versions

Other versions: unknown

Microsoft · microsoft

Microsoft Office LTSC 2021

1 range

microsoft version evidence

Platforms: 32-bit Systems, x64-based Systems

Check a product version

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

affected

16.0.1 → before 16.0.14334.21048

custom versions

Other versions: unknown

Microsoft · microsoft

Microsoft Office LTSC 2024

1 range

microsoft version evidence

Platforms: 32-bit Systems, x64-based Systems

Check a product version

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

affected

16.0.0 → before 16.0.17932.21140

custom versions

Other versions: unknown

Microsoft · microsoft

Microsoft Office LTSC for Mac 2021

1 range

microsoft version evidence

Check a product version

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

affected

16.0.1 → before 16.115.26110837

custom versions

Other versions: unknown

Microsoft · microsoft

Microsoft Office LTSC for Mac 2024

1 range

microsoft version evidence

Check a product version

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

affected

16.0.0 → before 16.115.26110837

custom versions

Other versions: unknown

Microsoft · microsoft

Office Online Server

1 range

microsoft version evidence

Check a product version

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

affected

16.0.0.0 → before 16.0.10417.20236

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

Release of invalid pointer or reference in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.

References

1 sources

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-118708

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-2026-118708

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-763 ↗

CWE-763: Release of Invalid Pointer or Reference

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:office_macos_2021:*:*:*:*:*:long_term_servicing_channel:*:*

From (inclusive): 16.0.1

After:

Through (inclusive):

Before: 16.115.26110837

Vulnerable product

cpe:2.3:a:microsoft:office_macos_2024:*:*:*:*:*:long_term_servicing_channel:*:*

From (inclusive): 16.0.0

After:

Through (inclusive):

Before: 16.115.26110837

Vulnerable product

cpe:2.3:a:microsoft:office_365:*:*:*:*:*:macos:*:*

From (inclusive): 1.0.0

After:

Through (inclusive):

Before: 16.115.26110837

Vulnerable product

cpe:2.3:a:microsoft:office_2021:*:*:*:*:ltsc:*:*:*

From (inclusive): 16.0.0.0

After:

Through (inclusive):

Before: 16.0.10417.20236

Vulnerable product

cpe:2.3:a:microsoft:office_2021:*:*:*:*:long_term_servicing_channel:*:*:*

From (inclusive): 16.0.1

After:

Through (inclusive):

Before: 16.0.14334.21048

Vulnerable product

cpe:2.3:a:microsoft:office_2024:*:*:*:*:long_term_servicing_channel:*:*:*

From (inclusive): 16.0.0

After:

Through (inclusive):

Before: 16.0.17932.21140

Vulnerable product

cpe:2.3:a:microsoft:365_apps:*:*:*:*:enterprise:*:*:*

From (inclusive): 16.0.1

After:

Through (inclusive):

Before: https://aka.ms/OfficeSecurityReleases

Applicability preview

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  {
    "nodes": [
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            "vulnerable": true,
            "criteria": "cpe:2.3:a:microsoft:office_macos_2021:*:*:*:*:*:long_term_servicing_channel:*:*",
            "versionStartIncluding": "16.0.1",
            "versionEndExcluding": "16.115.26110837"
          },
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          },
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Contributing organizations · 2

microsoft

Assigning organization

2026-11-13

CISA-ADP

Additional data publisher

2026-11-10

Timeline

All times UTC

10 Nov 2026, 18:24
Advisory published
Publication date supplied by the source.
13 Nov 2026, 18:13
Source updated
Latest modification date supplied by the source.
13 Nov 2026, 18:52
Last imported by cve.new
Latest catalog import, not the date we first saw this advisory.

What changed

Follow changes

CVE · CVE-2026-1187082026-11-10

Observed 2026-11-10T20:08:45.461Z · upstream updated 2026-11-10T19:45:10.687Z

Prioritization updated

before

[]

after

[
  {
    "source": "CISA-ADP",
    "type": "SSVC",
    "role": "CISA Coordinator",
    "timestamp": "2026-11-10T19:35:00.798670Z",
    "decisions": [
      {
        "name": "Exploitation",
        "value": "none"
      },
      {
        "name": "Automatable",
        "value": "no"
      },
      {
        "name": "Technical Impact",
        "value": "total"
      }
    ]
  }
]

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

Showing up to 50 most recent observed changes.

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: No EPSS estimate available in this record.

CISA-ADP · SSVC

CISA Coordinator · 2026-11-10

Exploitation: none
Automatable: no
Technical Impact: total

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-2026-118708

Enrichment coverage

NVDAvailable

Checked 11/11/2026, 11:45:32 UTC

GHSAAvailable

Checked 11/11/2026, 11:45:32 UTC

EUVDAvailable

Checked 11/11/2026, 11:45:32 UTC

EPSSNo result

Checked 11/11/2026, 11:45:32 UTC

Additional source evidence

GitHub Advisory Database · GHSA-72vq-pp36-vfjx

CVSS 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Checked 11/11/2026, 11:45:32 UTC

ENISA EUVD · EUVD-2026-122578

CVSS 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Checked 11/11/2026, 11:45:32 UTC

NVD · CVE-2026-118708

CVSS 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Checked 11/11/2026, 11:45:32 UTC

Sponsored by MoxsoBuild security habits with adaptive training and phishing simulations.View as JSON

Microsoft Office Excel Remote Code Execution Vulnerability

Severity and exploitation

What this means

Attack conditions

Affected versions

Microsoft 365 Apps for Enterprise

affected

unaffected

unknown

Microsoft Office 365 for Mac

affected

unaffected

unknown

Microsoft Office LTSC 2021

affected

unaffected

unknown

Microsoft Office LTSC 2024

affected

unaffected

unknown

Microsoft Office LTSC for Mac 2021

affected

unaffected

unknown

Microsoft Office LTSC for Mac 2024

affected

unaffected

unknown

Office Online Server

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