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Multiple Microsoft Product Vulnerabilities, 4 CVEs

Favicon for www.cert.ssi.gouv.fr CERT-FR Security Advisories
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Summary

CERT-FR issued advisory CERTFR-2026-AVI-0435 warning of four unpatched vulnerabilities (CVE-2026-27456, CVE-2026-3184, CVE-2026-34933, CVE-2026-4878) in Microsoft products affecting azl3 and cbl2 system versions. The vulnerabilities allow attackers to cause unspecified security issues. Organizations running affected azl3 versions of avahi, libcap, and util-linux, or cbl2 versions of avahi and libcap, should apply patches per Microsoft security bulletins.

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What changed

CERT-FR published advisory CERTFR-2026-AVI-0435 disclosing four unpatched vulnerabilities in Microsoft products affecting specific azl3 and cbl2 system versions. The affected packages are azl3 avahi (prior to 0.8-8), azl3 libcap (prior to 2.69-14), azl3 util-linux (prior to 2.40.2-4), cbl2 avahi (prior to 0.8-6), and cbl2 libcap (prior to 2.60-8). The vulnerabilities may allow attackers to cause unspecified security issues.

Organizations using affected azl3 or cbl2 versions of these Microsoft-related packages should immediately consult the referenced Microsoft security bulletins and apply available patches. Failure to patch could expose systems to exploitation. CERT-FR recommends referring to the Microsoft Security Response Center for patch availability and installation guidance.

What to do next

  1. Apply Microsoft security patches for CVE-2026-27456, CVE-2026-3184, CVE-2026-34933, and CVE-2026-4878
  2. Update azl3 and cbl2 system packages to patched versions
  3. Monitor Microsoft security bulletins for additional updates

Archived snapshot

Apr 14, 2026

GovPing captured this document from the original source. If the source has since changed or been removed, this is the text as it existed at that time.

Premier Ministre S.G.D.S.N

Agence nationale
de la sécurité des
systèmes d'information

Paris, le 14 avril 2026 N° CERTFR-2026-AVI-0435 Affaire suivie par: CERT-FR

Avis du CERT-FR

Objet: Multiples vulnérabilités dans les produits Microsoft

Gestion du document

| Référence | CERTFR-2026-AVI-0435 |
| Titre | Multiples vulnérabilités dans les produits Microsoft |
| Date de la première version | 14 avril 2026 |
| Date de la dernière version | 14 avril 2026 |
| Source(s) | Bulletin de sécurité Microsoft CVE-2026-27456 du 05 avril 2026
Bulletin de sécurité Microsoft CVE-2026-3184 du 07 avril 2026
Bulletin de sécurité Microsoft CVE-2026-34933 du 09 avril 2026
Bulletin de sécurité Microsoft CVE-2026-4878 du 11 avril 2026 |
Une gestion de version détaillée se trouve à la fin de ce document.

Risque

  • Non spécifié par l'éditeur

Systèmes affectés

  • azl3 avahi 0.8-7 versions antérieures à 0.8-8
  • azl3 libcap 2.69-13 versions antérieures à 2.69-14
  • azl3 util-linux 2.40.2-3 versions antérieures à 2.40.2-4
  • cbl2 avahi 0.8-5 versions antérieures à 0.8-6
  • cbl2 libcap 2.60-7 versions antérieures à 2.60-8

Résumé

De multiples vulnérabilités ont été découvertes dans les produits Microsoft. Elles permettent à un attaquant de provoquer un problème de sécurité non spécifié par l'éditeur.

Solutions

Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).

Documentation

Gestion détaillée du document

  1. le 14 avril 2026 Version initiale

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Data Privacy & Cybersecurity

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Classification

Agency
CERT-FR
Published
April 14th, 2026
Instrument
Notice
Legal weight
Non-binding
Stage
Final
Change scope
Substantive
Document ID
CERTFR-2026-AVI-0435

Who this affects

Applies to
Technology companies Government agencies
Industry sector
5112 Software & Technology
Activity scope
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Geographic scope
France FR

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Cybersecurity
Operational domain
IT Security
Compliance frameworks
NIST CSF
Topics
Data Privacy Software & Technology

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