CERTFR-2026-ALE-008
Vulnerability from certfr_alerte - Published: 2026-07-22 - Updated: 2026-07-22
Le 14 juillet 2026, à l'occasion de sa mise à jour mensuelle, Microsoft a publié, entre autres, des correctifs pour deux vulnérabilités critiques affectant SharePoint.
Les vulnérabilités CVE-2026-50522 et CVE-2026-58644 permettent à un attaquant non authentifié d'exécuter du code arbitraire à distance.
Dans son avis du 14 juillet 2026, Microsoft a indiqué que la vulnérabilité CVE-2026-58644 est activement exploitée.
Dans une communication en date du 21 juillet 2026, l'entreprise de sécurité informatique watchTowr déclare avoir connaissance d'une preuve de concept publique, ainsi que d'exploitations actives de la vulnérabilité CVE-2026-50522.
Le CERT-FR recommande donc l'application des correctifs dans les plus brefs délais.
En cas de soupçons de compromission, le CERT-FR recommande également le changement des secrets, incluant la rotation des clés de machine ASP.NET du SharePoint Server.
En effet, le vol de ces secrets peut permettre à l'attaquant de revenir après l'application de la mise à jour.
Solutions
Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).
Impacted products
| Vendor | Product | Description | ||
|---|---|---|---|---|
| Microsoft | SharePoint Enterprise Server 2016 | Microsoft SharePoint Enterprise Server 2016 versions antérieures à 16.0.5556.1005 | ||
| Microsoft | SharePoint Server Subscription Edition | Microsoft SharePoint Server Subscription Edition versions antérieures à 16.0.19725.20384 | ||
| Microsoft | SharePoint Enterprise Server 2016 | Microsoft SharePoint Enterprise Server 2016 versions antérieures à 16.0.5561.1001 | ||
| Microsoft | SharePoint Server 2019 | Microsoft SharePoint Server 2019 versions antérieures à 16.0.10417.20153 | ||
| Microsoft | SharePoint Server Subscription Edition | Microsoft SharePoint Server Subscription Edition versions antérieures à 16.0.19725.20434 | ||
| Microsoft | SharePoint Server 2019 | Microsoft SharePoint Server 2019 versions antérieures à 16.0.10417.20175 |
References
| Title | Publication Time | Tags | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
{
"$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
"affected_systems": [
{
"description": "Microsoft SharePoint Enterprise Server 2016 versions ant\u00e9rieures \u00e0 16.0.5556.1005",
"product": {
"name": "SharePoint Enterprise Server 2016",
"vendor": {
"name": "Microsoft",
"scada": false
}
}
},
{
"description": "Microsoft SharePoint Server Subscription Edition versions ant\u00e9rieures \u00e0 16.0.19725.20384",
"product": {
"name": "SharePoint Server Subscription Edition",
"vendor": {
"name": "Microsoft",
"scada": false
}
}
},
{
"description": "Microsoft SharePoint Enterprise Server 2016 versions ant\u00e9rieures \u00e0 16.0.5561.1001",
"product": {
"name": "SharePoint Enterprise Server 2016",
"vendor": {
"name": "Microsoft",
"scada": false
}
}
},
{
"description": "Microsoft SharePoint Server 2019 versions ant\u00e9rieures \u00e0 16.0.10417.20153",
"product": {
"name": "SharePoint Server 2019",
"vendor": {
"name": "Microsoft",
"scada": false
}
}
},
{
"description": "Microsoft SharePoint Server Subscription Edition versions ant\u00e9rieures \u00e0 16.0.19725.20434",
"product": {
"name": "SharePoint Server Subscription Edition",
"vendor": {
"name": "Microsoft",
"scada": false
}
}
},
{
"description": "Microsoft SharePoint Server 2019 versions ant\u00e9rieures \u00e0 16.0.10417.20175",
"product": {
"name": "SharePoint Server 2019",
"vendor": {
"name": "Microsoft",
"scada": false
}
}
}
],
"affected_systems_content": "",
"closed_at": null,
"content": "## Solutions\n\nSe r\u00e9f\u00e9rer au bulletin de s\u00e9curit\u00e9 de l\u0027\u00e9diteur pour l\u0027obtention des correctifs (cf. section Documentation).",
"cves": [
{
"name": "CVE-2026-50522",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-50522"
},
{
"name": "CVE-2026-58644",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-58644"
}
],
"initial_release_date": "2026-07-22T00:00:00",
"last_revision_date": "2026-07-22T00:00:00",
"links": [
{
"title": "Communication Defused du 20 juillet 2026",
"url": "https://x.com/DefusedCyber/status/2079128402855116858"
},
{
"title": "Communication watchTowr du 21 juillet 2026",
"url": "https://www.linkedin.com/feed/update/urn:li:activity:7485278595850940416/"
},
{
"title": "Avis CERT-FR CERTFR-2026-AVI-0872 du 15 juillet 2026",
"url": "https://www.cert.ssi.gouv.fr/avis/CERTFR-2026-AVI-0872/"
},
{
"title": "Alerte CERT-FR CERTFR-2025-ALE-010 du 21 juillet 2025",
"url": "https://www.cert.ssi.gouv.fr/alerte/CERTFR-2025-ALE-010/"
}
],
"reference": "CERTFR-2026-ALE-008",
"revisions": [
{
"description": "Version initiale",
"revision_date": "2026-07-22T00:00:00.000000"
}
],
"risks": [
{
"description": "Ex\u00e9cution de code arbitraire \u00e0 distance"
}
],
"summary": "Le 14 juillet 2026, \u00e0 l\u0027occasion de sa mise \u00e0 jour mensuelle, Microsoft a publi\u00e9, entre autres, des correctifs pour deux vuln\u00e9rabilit\u00e9s critiques affectant SharePoint.\n\nLes vuln\u00e9rabilit\u00e9s CVE-2026-50522 et CVE-2026-58644 permettent \u00e0 un attaquant non authentifi\u00e9 d\u0027ex\u00e9cuter du code arbitraire \u00e0 distance.\n\nDans son avis du 14 juillet 2026, Microsoft a indiqu\u00e9 que la vuln\u00e9rabilit\u00e9 CVE-2026-58644 est activement exploit\u00e9e.\n\nDans une communication en date du 21 juillet 2026, l\u0027entreprise de s\u00e9curit\u00e9 informatique watchTowr d\u00e9clare avoir connaissance d\u0027une preuve de concept publique, ainsi que d\u0027exploitations actives de la vuln\u00e9rabilit\u00e9 CVE-2026-50522.\n\nLe CERT-FR recommande donc l\u0027application des correctifs dans les plus brefs d\u00e9lais.\u003cbr\u003e\nEn cas de soup\u00e7ons de compromission, le CERT-FR recommande \u00e9galement le changement des secrets, incluant la rotation des cl\u00e9s de machine ASP.NET du SharePoint Server. \u003cbr\u003e\nEn effet, le vol de ces secrets peut permettre \u00e0 l\u0027attaquant de revenir apr\u00e8s l\u0027application de la mise \u00e0 jour.",
"title": "Multiples vuln\u00e9rabilit\u00e9s dans Microsoft Sharepoint",
"vendor_advisories": [
{
"published_at": "2026-07-14",
"title": "Bulletin de s\u00e9curit\u00e9 Microsoft CVE-2026-50522",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50522"
},
{
"published_at": "2026-07-14",
"title": "Bulletin de s\u00e9curit\u00e9 Microsoft CVE-2026-58644",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58644"
}
]
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
Loading…
Loading…