Security readout for executives and security teams
Plain-English summary
CVE-2026-57100 is a critical Microsoft Entra Provisioning Service privilege-escalation flaw. An already authorized attacker could abuse server-side request forgery to gain elevated privileges over a network. The provided sources do not identify affected versions or tenant-specific conditions, so exposure must be confirmed against Microsoft guidance.
Executive priority
Prioritize this as an identity-plane critical issue. The vulnerability affects a Microsoft provisioning service and could allow privilege elevation, but the supplied evidence does not show active exploitation. Confirm exposure and remediation status promptly with identity and cloud administrators.
Technical view
The vulnerability is CWE-918 SSRF in Microsoft Entra Provisioning Service, also identified as SyncFabric. CVSS 3.1 is 9.9 with network access, low complexity, low privileges, no user interaction, changed scope, and high confidentiality, integrity, and availability impact. Microsoft is the vendor source and the advisory is marked as patched.
Likely exposure
Organizations using Microsoft Entra Provisioning Service may be exposed. The bundle lists no specific versions, CPEs, or configuration prerequisites beyond requiring an authorized attacker, so vulnerability managers should verify service use and Microsoft tenant guidance directly.
Exploitation context
The bundle reports KEV status as false and CVSS exploit maturity as unproven. There is no cited evidence of active exploitation, public exploit availability, or weaponized activity. Treat the issue as urgent because successful abuse could elevate privileges in identity provisioning workflows.
Researcher notes
Key gaps are affected version details, tenant prerequisites, and concrete remediation mechanics. The strongest facts are from CVE metadata and Microsoft’s advisory reference: SSRF, authorized attacker, privilege escalation, CVSS 9.9, official remediation indicated, and no KEV listing in the provided bundle.
Mitigation direction
- Review Microsoft MSRC guidance for CVE-2026-57100 and apply listed remediation.
- Confirm whether Microsoft Entra Provisioning Service or SyncFabric is used.
- Reduce provisioning administration rights to the minimum required roles.
- Review app credentials, connectors, and service principals tied to provisioning.
- Monitor Microsoft updates for tenant-specific actions or revised scope.
Validation and detection
- Inventory Entra provisioning configurations across production tenants.
- Check MSRC for patch status, required actions, and updated affected scope.
- Review Entra audit and provisioning logs for unusual privilege or connector changes.
- Validate that provisioning administrators and service principals follow least privilege.
- Document whether each tenant is affected, remediated, or not using the service.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-918: Information exposure and cloud metadata lookup
Information exposure and SSRF weaknesses can make discovery, cloud metadata, and credential material review relevant. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupPrivilege behavior lookup
The CVE wording references privilege impact, so privilege escalation and authorization behavior review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCloud metadata behavior lookup
The CVE wording references SSRF or metadata access, so cloud discovery and credential material review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-57100 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.9 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C3.16microsoftVulnerability scoring details
Base CVSS 3.1 score
9.9CriticalVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- Microsoft Entra Provisioning Service Elevation of Privilege VulnerabilityCVE reference, microsoft · vendor-advisory, patch
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Server-Side Request Forgery (SSRF)
Server-Side Request Forgery (SSRF) represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.