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CVE-2026-58071 – Missing Authentication / Proxied Appliance API Access as Portal Administrator – Vee

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Summary

CVE-2026-58071 is a missing-authentication vulnerability (CWE-306) in Veeam Service Provider Console. An unauthenticated attacker can access the proxied appliance API with Portal Administrator privileges during a brief window immediately after an administrator initiates a session. Veeam rates the issue High, with a CVSS v4.0 base score of 8.2.

Technical details

  • Root cause: Missing authentication for a critical function (CWE-306) — the proxied appliance API is reachable without authentication during a brief window following an administrator session initiation.
  • Trigger conditions: An administrator must initiate a session; the exposure window opens immediately afterward, during which the API can be reached as Portal Administrator.
  • Attack vector: Network. Per the CVSS v4.0 vector the attack requires low complexity, no privileges, and no user interaction, but carries an attack requirement (AT:P).
  • Impact: Unauthorized access to the proxied appliance API at the Portal Administrator role, resulting in high confidentiality impact; integrity and availability are not affected per the CVSS vector.

Affected software

  • Veeam Service Provider Console version 9.2.1.33875 and all earlier version 9 builds (all versions before 9.3).

Severity

  • CVSS v4.0 base score: 8.2 (High).
  • CVSS v4.0 vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N.
  • A CVSS v3.1 score has not been published by NVD for this CVE.

Mitigation and recommended actions

  • Immediate: Upgrade to Veeam Service Provider Console 9.3.0.35057, which resolves this vulnerability.
  • If no patch: Veeam does not provide a standalone workaround. Until the upgrade is applied, restrict network access to the Service Provider Console and its portal.

How IONIX identifies potentially affected assets

IONIX matches the following signals against data already collected when it crawled the asset; identifying the technology sends no request beyond that crawl.

  • Page title: Veeam Service Provider Console, Veeam Availability Console
  • Raw response body: Veeam Service Provider Console, Veeam Availability Console, Portal Administrator

References

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How IONIX’s External Exposure Management Platform Detects and Validates
Zero-Days to Shrink MTTR

1

Map your entire attack surface (continously)

IONIX uses multi-factor discovery methods, including DNS analysis, certificate mapping, metadata inspection, and more, to automatically map every internet-facing asset across your environment. This includes cloud instances, third-party platforms, shadow IT, and even forgotten infrastructure that traditional tools miss.

2

Monitor for new CVEs

Dozens of threat intel feeds using agentic technology are continuously analyzed to detect the appearance of proof-of-concept code, exploit kits, and indicators of active targeting. IONIX goes further by applying AI to proactively evaluate whether emerging vulnerabilities are likely to be exploited, even before PoCs go public.

3

Identify Potential External Exposures

Not all CVEs matter. IONIX filters vulnerabilities by asking attacker-centric questions: Can it be reached from the internet? Does it require authentication? Is it being exploited in the wild? This dramatically reduces noise and focuses teams on threats that can actually be weaponized.

4

Create Safe, Scalable Exploit Validations

IONIX transforms real-world PoCs into safe, non-intrusive test payloads that can be run in production environments without disruption. These simulations are precisely targeted to the systems that are vulnerable, ensuring rapid validation without unnecessary load.

5

Execute Exploit Validations

By combining context about software stack, versioning, exposure status, and reachability, IONIX ensures that only the right payloads are executed against the right assets, maximizing efficiency and minimizing risk.

6

Drive Fast and Actionable Remediation

Results are routed through integrations with ticketing, SOAR, and SIEM tools. Issues are written in plain language, bundled into remediation clusters, and prioritized based on asset criticality, exploitability, and blast radius. This shortens mean time to remediation (MTTR) and empowers teams to act with confidence.

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  • Mapping of all Assets with this Technology
  • Identification of potentially exposed assets to this CVE
  • Confirmation of verified exploitable assets
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