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Full vulnerability report · 2026
CVE-2026-62882High confidence

Microsoft Outlook Spoofing Vulnerability

Microsoft · Microsoft 365 Apps for Enterprise

4.3MediumCVSS 3.1
Recommended action
Scheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2026-56723

No EUVD known-exploited evidence

Insufficiently protected credentials in Microsoft Office Outlook allows an unauthorized attacker to perform spoofing over a network.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
4.3 · CVSS 3.1
Advisory evidence
No linked advisory details stored yet
Recommended actionScheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available
01

What, why and how

Insufficiently protected credentials in Microsoft Office Outlook allows an unauthorized attacker to perform spoofing over a network.

What

Insufficiently protected credentials in Microsoft Office Outlook allows an unauthorized attacker to perform spoofing over a network.

Why

The product transmits or stores authentication credentials, but it uses an insecure method that is susceptible to unauthorized interception and/or retrieval.

How

An attacker operating through a network path may attempt exploitation without authentication after a user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

Insufficiently protected credentials in Microsoft Office Outlook allows an unauthorized attacker to perform spoofing over a network.

Why

The product transmits or stores authentication credentials, but it uses an insecure method that is susceptible to unauthorized interception and/or retrieval.

How

An attacker operating through a network path may attempt exploitation without authentication after a user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
a network path → Insufficiently Protected Credentials → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
Required interaction required
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-522 ↗

CWE-522: Insufficiently Protected Credentials. The product transmits or stores authentication credentials, but it uses an insecure method that is susceptible to unauthorized interception and/or retrieval.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UIRequiredUser interaction: Another user must perform an action for exploitation to succeed.SUnchangedScope: The security impact remains within the vulnerable component's authority.CLowConfidentiality impact: A successful attack can cause a limited loss.INoneIntegrity impact: No direct loss is represented by this metric.ANoneAvailability impact: No direct loss is represented by this metric.
Post-exploitation / living off the land
Stolen credentials, tokens and legitimate administration functions may provide continued access without deploying a large custom toolset.
NetworkUnauthenticatedCWE-522
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

ENISA EUVD · EUVD-2026-56723Official EUVD mapping

Insufficiently protected credentials in Microsoft Office Outlook allows an unauthorized attacker to perform spoofing over a network.

Official EUVD record
BSI · German · WID-SEC-W-2026-2762Microsoft Office Produkte: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in Microsoft Office Produkte ausnutzen, um Dateien zu manipulieren, um seine Privilegien zu erhöhen, um Informationen offenzulegen, um einen Cross-Site Scripting Angriff durchzuführen, und um beliebigen Programmcode auszuführen.

Official advisory
CERT-FR · French · CERTFR-2026-AVI-1000Multiples vulnérabilités dans Microsoft Office

mmandations Flux RSS des bulletins d'actualité Premier Ministre S.G.D.S.N Agence nationale de la sécurité des systèmes d'information Paris, le 12 août 2026 N° CERTFR-2026-AVI-1000 Affaire suivie par: CERT-FR Avis du CERT-FR Objet: Multiples vulnérabilités dans Microsoft Office Gestion du document Référence CERTFR-2026-AVI-1000 Titre Multiples vulnérabilités dans Microsoft Office Date de la première version 12 août 2026 Date de la dernière version 12 août 2026 Source(s) Bulletin de sécurité Microsoft Office CVE-2026-58651 du 11 août 2026 Bulletin de sécurité Microsoft Office CVE-2026-62842 du 11 août 2026 Bulletin de sécurité Microsoft Office CVE-2026-62882 du 11 août 2026 Bulletin de sécurité Microsoft Office CVE-2026-63513 du 11 août 2026 Bulletin de sécurité Microsoft Office CVE-2026-63515 du 11 août 2026 Bulletin de sécurité Microsoft Office CVE-2026-63517 du 11 août 2026 Bulletin de sécurité Microsoft Office CVE-2026-63518 du 11 août 2026 Bulletin de sécurité Microsoft Office CVE-2026-63519 du 11 août 2026 Bulletin de sécurité Microsoft Office CVE-2026-63521 du 11 août 2026 Bulletin de sécurité Microsoft Office CVE-2026-63524 du 11 août 2026 Bulletin de sécurité Microsoft Office CVE-2026-63525 du 11 août 2026 Bulletin de sécurité Microsoft Office CVE-2026-63526 du 11 août 2026 Bulletin de

Official advisory
CSIRT Italia · Italian · aggiornamenti-mensili-microsoft-23Aggiornamenti Mensili Microsoft

nuova finestra - - CVE-2026-62899 : apre una nuova finestra - - CVE-2026-62898 : apre una nuova finestra - - CVE-2026-62897 : apre una nuova finestra - - CVE-2026-62896 : apre una nuova finestra - - CVE-2026-62894 : apre una nuova finestra - - CVE-2026-62893 : apre una nuova finestra - - CVE-2026-62892 : apre una nuova finestra - - CVE-2026-62890 : apre una nuova finestra - - CVE-2026-62889 : apre una nuova finestra - - CVE-2026-62888 : apre una nuova finestra - - CVE-2026-62887 : apre una nuova finestra - - CVE-2026-62886 : apre una nuova finestra - - CVE-2026-62885 : apre una nuova finestra - - CVE-2026-62883 : apre una nuova finestra - - CVE-2026-62882 : apre una nuova finestra - - CVE-2026-62881 : apre una nuova finestra - - CVE-2026-62880 : apre una nuova finestra - - CVE-2026-62878 : apre una nuova finestra - - CVE-2026-62877 : apre una nuova finestra - - CVE-2026-62876 : apre una nuova finestra - - CVE-2026-62873 : apre una nuova finestra - - CVE-2026-62872 : apre una nuova finestra - - CVE-2026-62871 : apre una nuova finestra - - CVE-2026-62869 : apre una nuova finestra - - CVE-2026-62842 : apre una nuova finestra - - CVE-2026-62839 : apre una nuova finestra - - CVE-2026-62837 : apre una nuova finestra - - CVE-2026-62836 : apre una nuova finestra - - CVE-2026-62832 : apre una nuova fi

Official advisory
NCSC-NL · Dutch · NCSC-2026-0286Kwetsbaarheden verholpen in Microsoft Office

Insufficiently protected credentials in Microsoft Office Outlook enable unauthorized attackers to perform network-based spoofing attacks.

Official advisory
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Patch available
Affected
16.0.1 < https://aka.ms/OfficeSecurityReleases; 19.0.0 < https://aka.ms/OfficeSecurityReleases; 16.0.0 < https://aka.ms/OfficeSecurityReleases; 16.0.0.0 < 16.0.5565.1000
Fixed
An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
Action
Review the linked authoritative reference and apply the recorded fixed release appropriate to the affected product branch.
Workaround
No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04

Evidence and provenance

Published 11 Aug 2026 · Last source change 9 Sept 2026, 19:37 UTC · CWE-522 · Insufficiently Protected Credentials

CVE recordCVE.org · 5.2
CVSS sourceCNA
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2026-56723
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceOther authority
NVD statusNVD enriched

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates →
  1. Vendor guidanceAuthoritative vendor guidance changed from no authoritative guidance recorded to authoritative remediation link · patch.
    Before
    no authoritative guidance recorded
    After
    authoritative remediation link · patch
    secure@microsoft.com ↗
  2. Affected versionsThe structured affected or fixed version information changed.
    Before
    16.0.1 < https://aka.ms/OfficeSecurityReleases; 19.0.0 < https://aka.ms/OfficeSecurityReleases; 16.0.0 < https://aka.ms/OfficeSecurityReleases; 16.0.0.0 < 16.0.5565.1000 · Fixed: No fixed version is explicitly recorded in the structured CVE data.
    After
    16.0.1 < https://aka.ms/OfficeSecurityReleases; 19.0.0 < https://aka.ms/OfficeSecurityReleases; 16.0.0 < https://aka.ms/OfficeSecurityReleases; 16.0.0.0 < 16.0.5565.1000 · Fixed: An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
    CNA ↗
  3. Remediation statusRemediation status changed from Awaiting fix to Patch available.
    Before
    Awaiting fix
    After
    Patch available
    secure@microsoft.com ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Fixed release or patch reference recorded
ENISA EUVD · EUVD-2026-56723↗CVE authority or vendor reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2026-62882 · cve.blacktree.nl