CERTFR-2026-AVI-0586
Vulnerability from certfr_avis - Published: 2026-05-13 - Updated: 2026-05-13
De multiples vulnérabilités ont été découvertes dans Microsoft .Net. Elles permettent à un attaquant de provoquer une élévation de privilèges et un déni de service à distance.
Solutions
Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).
Impacted products
| Vendor | Product | Description | ||
|---|---|---|---|---|
| Microsoft | N/A | .NET 9.0 sur Mac OS versions antérieures à 9.0.16 | ||
| Microsoft | N/A | Microsoft .NET Framework 3.5 et 4.8.1 versions antérieures à 4.8.9334.0 et 4.8.4802.0 | ||
| Microsoft | N/A | .NET 8.0 sur Linux versions antérieures à 8.0.27 | ||
| Microsoft | N/A | Microsoft .NET Framework 3.5 et 4.8 versions antérieures à 4.8.9334.0 et 4.8.4802.0 | ||
| Microsoft | N/A | .NET 8.0 sur Mac OS versions antérieures à 8.0.27 | ||
| Microsoft | N/A | .NET 10.0 installed sur Windows versions antérieures à 10.0.8 | ||
| Microsoft | N/A | .NET 8.0 sur Windows versions antérieures à 8.0.27 | ||
| Microsoft | N/A | .NET 9.0 sur Linux versions antérieures à 9.0.16 | ||
| Microsoft | N/A | .NET 10.0 sur Mac OS versions antérieures à 10.0.8 | ||
| Microsoft | N/A | Microsoft .NET Framework 4.8 versions antérieures à 4.8.9334.0 et 4.8.4802.0 | ||
| Microsoft | N/A | Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 versions antérieures à 4.8.9334.0 et 4.8.4802.0 | ||
| Microsoft | N/A | Microsoft .NET Framework 3.5 versions antérieures à 4.8.9334.0 et 4.8.4802.0 | ||
| Microsoft | N/A | Microsoft .NET Framework 3.5 et 4.7.2 versions antérieures à 4.8.9334.0 et 4.8.4802.0 | ||
| Microsoft | N/A | .NET 9.0 sur Windows versions antérieures à 9.0.16 | ||
| Microsoft | N/A | .NET 10.0 sur Linux versions antérieures à 10.0.8 |
References
| Title | Publication Time | Tags | ||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
{
"$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
"affected_systems": [
{
"description": ".NET 9.0 sur Mac OS versions ant\u00e9rieures \u00e0 9.0.16",
"product": {
"name": "N/A",
"vendor": {
"name": "Microsoft",
"scada": false
}
}
},
{
"description": "Microsoft .NET Framework 3.5 et 4.8.1 versions ant\u00e9rieures \u00e0 4.8.9334.0 et 4.8.4802.0",
"product": {
"name": "N/A",
"vendor": {
"name": "Microsoft",
"scada": false
}
}
},
{
"description": ".NET 8.0 sur Linux versions ant\u00e9rieures \u00e0 8.0.27",
"product": {
"name": "N/A",
"vendor": {
"name": "Microsoft",
"scada": false
}
}
},
{
"description": "Microsoft .NET Framework 3.5 et 4.8 versions ant\u00e9rieures \u00e0 4.8.9334.0 et 4.8.4802.0",
"product": {
"name": "N/A",
"vendor": {
"name": "Microsoft",
"scada": false
}
}
},
{
"description": ".NET 8.0 sur Mac OS versions ant\u00e9rieures \u00e0 8.0.27",
"product": {
"name": "N/A",
"vendor": {
"name": "Microsoft",
"scada": false
}
}
},
{
"description": ".NET 10.0 installed sur Windows versions ant\u00e9rieures \u00e0 10.0.8",
"product": {
"name": "N/A",
"vendor": {
"name": "Microsoft",
"scada": false
}
}
},
{
"description": ".NET 8.0 sur Windows versions ant\u00e9rieures \u00e0 8.0.27",
"product": {
"name": "N/A",
"vendor": {
"name": "Microsoft",
"scada": false
}
}
},
{
"description": ".NET 9.0 sur Linux versions ant\u00e9rieures \u00e0 9.0.16",
"product": {
"name": "N/A",
"vendor": {
"name": "Microsoft",
"scada": false
}
}
},
{
"description": ".NET 10.0 sur Mac OS versions ant\u00e9rieures \u00e0 10.0.8",
"product": {
"name": "N/A",
"vendor": {
"name": "Microsoft",
"scada": false
}
}
},
{
"description": "Microsoft .NET Framework 4.8 versions ant\u00e9rieures \u00e0 4.8.9334.0 et 4.8.4802.0",
"product": {
"name": "N/A",
"vendor": {
"name": "Microsoft",
"scada": false
}
}
},
{
"description": "Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 versions ant\u00e9rieures \u00e0 4.8.9334.0 et 4.8.4802.0",
"product": {
"name": "N/A",
"vendor": {
"name": "Microsoft",
"scada": false
}
}
},
{
"description": "Microsoft .NET Framework 3.5 versions ant\u00e9rieures \u00e0 4.8.9334.0 et 4.8.4802.0",
"product": {
"name": "N/A",
"vendor": {
"name": "Microsoft",
"scada": false
}
}
},
{
"description": "Microsoft .NET Framework 3.5 et 4.7.2 versions ant\u00e9rieures \u00e0 4.8.9334.0 et 4.8.4802.0",
"product": {
"name": "N/A",
"vendor": {
"name": "Microsoft",
"scada": false
}
}
},
{
"description": ".NET 9.0 sur Windows versions ant\u00e9rieures \u00e0 9.0.16",
"product": {
"name": "N/A",
"vendor": {
"name": "Microsoft",
"scada": false
}
}
},
{
"description": ".NET 10.0 sur Linux versions ant\u00e9rieures \u00e0 10.0.8",
"product": {
"name": "N/A",
"vendor": {
"name": "Microsoft",
"scada": false
}
}
}
],
"affected_systems_content": "",
"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-2026-42899",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-42899"
},
{
"name": "CVE-2026-32177",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-32177"
}
],
"initial_release_date": "2026-05-13T00:00:00",
"last_revision_date": "2026-05-13T00:00:00",
"links": [],
"reference": "CERTFR-2026-AVI-0586",
"revisions": [
{
"description": "Version initiale",
"revision_date": "2026-05-13T00:00:00.000000"
}
],
"risks": [
{
"description": "D\u00e9ni de service \u00e0 distance"
},
{
"description": "\u00c9l\u00e9vation de privil\u00e8ges"
}
],
"summary": "De multiples vuln\u00e9rabilit\u00e9s ont \u00e9t\u00e9 d\u00e9couvertes dans Microsoft .Net. Elles permettent \u00e0 un attaquant de provoquer une \u00e9l\u00e9vation de privil\u00e8ges et un d\u00e9ni de service \u00e0 distance.",
"title": "Multiples vuln\u00e9rabilit\u00e9s dans Microsoft .Net",
"vendor_advisories": [
{
"published_at": "2026-05-12",
"title": "Bulletin de s\u00e9curit\u00e9 Microsoft .Net CVE-2026-42899",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42899"
},
{
"published_at": "2026-05-12",
"title": "Bulletin de s\u00e9curit\u00e9 Microsoft .Net CVE-2026-32177",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32177"
}
]
}
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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.
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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.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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