ZDI-26-629: Microsoft Azure Entra ID OAuth Device Code Grant Information Disclosure Vulnerability
Admiralty grading (A–F · 1–6)
Source reliability
- A Completely reliable
- B Usually reliable
- C Fairly reliable
- D Not usually reliable
- E Unreliable
- F Cannot be judged
Information credibility
- 1 Confirmed
- 2 Probably true
- 3 Possibly true
- 4 Doubtful
- 5 Improbable
- 6 Cannot be judged
NATO Admiralty (AJP-2.1) grades confidence, independent of the risk score. Cross-source corroboration isn't tracked for non-CVE news, so single-source items are capped at a lower credibility number; a low number does not imply low quality.
Key insight
Unauthenticated attackers can disclose sensitive information via OAuth Device Code Grant flows in Entra ID; threat to identity security and access control.
Description
The ZDI-26-629 vulnerability affects Microsoft Entra ID (formerly Azure AD) in the context of OAuth Device Code Grant flows. An information disclosure flaw allows remote attackers without authentication to exfiltrate sensitive data. The CVSS rating of 5.8 indicates moderate to significant impact. The precise exploitation method and current exploitation status are not yet fully documented, but require immediate attention for organizations using Entra ID for centralized identity management.
Risk score
- cvss base
- 0.00
- kev bonus
- 0.00
- epss bonus
- 0.00
- poc bonus
- 15.00
- raw before weight
- 15.00
- industry weight
- 1.21
- freshness factor
- 1.00
- exploitability factor
- 1.00
- days old
- 0.00
- vendor mismatch penalty
- 0.00
Path: operational