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CVE.org (no NVD analysis yet)· CNA microsoft

CVE-2026-124194: Microsoft Outlook Spoofing Vulnerability

MediumCVSS 6.5 · v3.1KEVWeaponized Fix available

Noroxi assessment

Priority: This week (action score 60/100)

  • CISA has confirmed exploitation in the wild (Nov 10, 2026). Remediation deadline for US federal agencies: Nov 24, 2026.
  • A ready-made attack tool exists and the flaw can be exploited over the network without an account, so priority is at least “This week”.
  • Probability of exploitation in the next 30 days: 1.6% (FIRST EPSS); higher than 76.3% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. A user must open a link or visit a page. No special conditions are required; it is repeatable.
  • Fixed version: Microsoft 365 Apps for Enterprise for 32-bit Systems https://aka.ms/OfficeSecurityReleases; Microsoft 365 Apps for Enterprise for 64-bit Systems https://aka.ms/OfficeSecurityReleases; Microsoft Office LTSC 2021 for 32-bit editions 16.0.14334.21048.

Don’t wait for the next maintenance window. Upgrade to Microsoft 365 Apps for Enterprise for 32-bit Systems https://aka.ms/OfficeSecurityReleases; Microsoft 365 Apps for Enterprise for 64-bit Systems https://aka.ms/OfficeSecurityReleases; Microsoft Office LTSC 2021 for 32-bit editions 16.0.14334.21048 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · CISA KEV · FIRST EPSS

Product ui does not warn user of unsafe actions in Microsoft Office Outlook allows an unauthorized attacker to perform spoofing over a network.

Published
Nov 10, 2026
Updated
Nov 11, 2026
EPSS
1.6% · 76th percentile

Report tools

JSON

Action score

60

This week

Don’t wait for the next maintenance window.

CVSS
26 / 40 · 6.5 / 10
CISA KEV
30 / 30 · Listed
EPSS
0 / 30 · 1.6%
Ready-made attack tool
4 / 60 · floor: at least 60

CISA SSVC decision

Exploitation
active
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · microsoft
6.5
NVD has not scored this yet; the score shown is the CNA’s.

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Actively exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on Nov 10, 2026. That signals real attacks, not theory.

Remediation deadline for US federal agencies: Nov 24, 2026.

Get told when this record changes

  • In CISA KEV: exploitation in the wild confirmed
  • Weaponized exploit exists
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-124194

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
microsoft365 apps
microsoftoffice 2021
microsoftoffice 2024

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • microsoft 365 appsall versions
  • microsoft office 2021all versions
  • microsoft office 2024all versions

Versions reported by the vendor

Affected version ranges reported by the assigning authority (microsoft). Independent of NVD's CPE analysis and usually ahead of it.

  • Microsoft Microsoft 365 Apps for Enterprise

    • 16.0.1 and later · before https://aka.ms/OfficeSecurityReleasesaffected

  • Microsoft Microsoft Office LTSC 2021

    • 16.0.1 and later · before 16.0.14334.21048affected

  • Microsoft Microsoft Office LTSC 2024

    • 16.0.0 and later · before 16.0.17932.21140affected

Same product

microsoft: all records

Other highest-scoring records for the same primary product.

  • CVE-2023-23397Microsoft Outlook Elevation of Privilege VulnerabilityKEV
    98Now
  • CVE-2024-21413Microsoft Outlook Remote Code Execution VulnerabilityKEV
    97Now
  • CVE-2026-21509Microsoft Office Security Feature Bypass VulnerabilityKEV
    82Now

Published before and after this one in the same product

  • ← EarlierCVE-2026-108453Oct 15, 2026 · Microsoft Office PowerPoint Information Disclosure Vulnerability
    26Monitor
  • ← EarlierCVE-2026-108454Oct 15, 2026 · Microsoft Office PowerPoint Information Disclosure Vulnerability
    26Monitor
  • ← EarlierCVE-2026-108455Oct 15, 2026 · Microsoft Office PowerPoint Information Disclosure Vulnerability
    26Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Microsoft 365 Apps for Enterprise for 32-bit Systemshttps://aka.ms/OfficeSecurityReleases · Release NotesMicrosoft (MSRC)
Microsoft 365 Apps for Enterprise for 64-bit Systemshttps://aka.ms/OfficeSecurityReleases · Release NotesMicrosoft (MSRC)
Microsoft Office LTSC 2021 for 32-bit editions16.0.14334.21048 · Release NotesMicrosoft (MSRC)
Microsoft Office LTSC 2021 for 64-bit editions16.0.14334.21048 · Release NotesMicrosoft (MSRC)
Microsoft Office LTSC 2024 for 32-bit editions16.0.17932.21140 · Release NotesMicrosoft (MSRC)
Microsoft Office LTSC 2024 for 64-bit editions16.0.17932.21140 · Release NotesMicrosoft (MSRC)

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Evidence

  • Proof-of-concept repository on GitHub ×2

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Proof-of-concept repository on GitHubstars:02026-11-11
Proof-of-concept repository on GitHubstars:02026-11-11

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. CISA KEV-1 d
  2. Published
  3. First PoCsame day
  4. Fix recorded+1 d
  5. TodayNov 12, 2026+1 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • A user must open a link or visit a page.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
none
Availability
none
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality impact
High
Integrity impact
None
Availability impact
None

Weakness class (CWE)

CWE-356 · Product UI does not Warn User of Unsafe Actions

CVSS vector

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

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓
  2. Exploit maturitynone → weaponized
  3. KEV✗ → ✓
  4. SSVC exploitation— → active
  5. Exploit maturity— → none

For records you follow, these changes also arrive as notifications. →

References

Show all references (1 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records