CVE-2026-80098Disclosure(microsoft / copilot_studio)

LOWCVSS 10.0 · CRITICAL

Signal is active with 1 mentions in latest observed window

Immediate actions

Patch microsoft copilot_studio systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

Improper verification of cryptographic signature in Copilot Studio allows an unauthorized attacker to elevate privileges over a network.

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0.5/ 10 priority

Sources & remediation

Vendor / third-party advisories

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-80098

Weakness type (CWE)

CWE-347

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

copilot_studio

Threat summary

Patch or workaround signal is available
3 mentions across 2 observed days
Momentum state: stable

What's happening

Patch or workaround mentioned in 2 signals
Technical details provided in 3 signals
Disclosure: 2 classified signals
Peaked 1d ago at 2 mentions (2026-09-04); latest day: 1
3 total mentions across 2 days

Affected systems

Vendors

microsoft

Products

copilot_studio

1 version affected across 1 product

Deep dive

Activity timeline3 mentions / 2d

Signal classification2 categories

Disclosure

266.7%

Patch

133.3%

Referenced assets2 URLs

By indicator

Classification over time

Date	Total	Labels

2026-09-04	2	Disclosure2
2026-09-09	1	Patch1

Full discourse3 posts

Bussio28Team | Ciberseguridad sin humo@Bussio28Team45d
Disclosure
🤖 Copilot Studio tiene una vulnerabilidad crítica, CVE-2026-80098, por una mala verificación de firmas. 👉 Importa porque puede permitir elevar privilegios. ✅ Medida: revisar el aviso de Microsoft y los permisos activos. De momento, sin explotación conocida. #IA
Post summary
Microsoft has disclosed a critical privilege‑elevation flaw in Copilot Studio (CVE‑2026‑80098) linked to improper signature verification; it recommends reviewing the Microsoft advisory and active permissions, but no exploitation has been reported.
0001059
101 followersView on X
connect24h@connect24h46d
Disclosure
正直、この並びは背筋が冷える。 Microsoft MSRCに、Azure AI Language、Copilot Studio、Azure AD B2C、Entra IDのElevation of Privilegeが4件並んだ。CVE-2026-70352、CVE-2026-80098、CVE-2026-83711、CVE-2026-62916だ。単一欠陥の波及ではないが、MSRCの記載ではcryptographic signatureの検証不備、user-controlled keyによるauthorization bypass、alternate path／channelを使うauthentication bypassを含む。これ、AIサービスの認証をEntraへ寄せた構成ほど他人事に見えない。 CSIRT目線では、対象serviceの利用有無とservice principal、sign-in log、audit logを同じ時間軸で見られるかが初動の分かれ目になる。各CVEの攻撃条件と影響範囲は元ページで追いたい。認証は正面玄関より、脇道の棚卸しが難しい。 #セキュリソース: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70352
Post summary
The post announces four new elevation‑of‑privilege CVEs affecting Azure AI services, referencing MSRC and detailing the types of authentication bypasses involved.
00010360
6.9K followersView on X
SecAlerts@SecAlertsCo41d
Patch
🔏 Microsoft Copilot Studio: broken crypto signature verification lets unauthenticated attackers elevate privileges over the network. CVSS 10, no user interaction needed. CVE-2026-80098 is patched — update now. #cybersecurity #ciso #cto #mssp https://secalerts.co/vulnerability/CVE-2026-80098?utm_campaign=x https://t.co/cO71AzLyUH
Post summary
The post announces a high‑severity (CVSS 10) vulnerability in Microsoft Copilot Studio, confirms it has been patched, and urges users to update immediately.
00000131
889 followersView on X

CPE platform detail1 entries

Part:

Vendor:

Product:

Version:

Target SW:

Target HW:

1 of 1 entries

Part	Vendor	Product	Version	Target SW	Target HW
App	microsoft	copilot_studio	-	-	-

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