High

Nuance PowerScribe Missing Authorization Information Disclosure

IdentifiersCVE-2025-30398CWE-862· Missing Authorization

CVE-2025-30398 is a critical information disclosure vulnerability affecting Nuance PowerScribe 360 and PowerScribe One. The issue is caused by missing authorization in the application, reportedly in an API endpoint, which allows an unauthenticated remote attacker to access data without proper authorization checks. Available reporting indicates the flaw can be exploited over the network by making a request to a specific endpoint and can result in disclosure of sensitive information, including personally identifiable information (PII).

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation allows an unauthenticated attacker to remotely disclose sensitive information from affected Nuance PowerScribe deployments. Reported exposed data includes sensitive information and PII. Because exploitation is network-accessible, unauthenticated, and assessed as low complexity, the vulnerability presents a significant confidentiality risk to exposed environments.

Mitigation

If you can’t patch tonight, do this now.

If immediate patching is not possible, restrict network access to Nuance PowerScribe interfaces and API endpoints to only trusted hosts and administrative networks, remove unnecessary internet exposure, and place the service behind compensating access controls such as VPNs, reverse proxies, or IP allowlists. Monitor logs for anomalous or unexpected requests to PowerScribe endpoints and review exposed data access for signs of unauthorized disclosure. These measures are compensating controls only and do not replace vendor patching.

Remediation

Patch, then assume compromise.

Apply the Microsoft/Nuance security update that addresses CVE-2025-30398 for affected Nuance PowerScribe 360 and PowerScribe One deployments. Validate that all vulnerable instances are updated to the vendor-remediated version and review vendor release notes for any product-specific post-update actions. Because the flaw involves missing authorization on an endpoint, organizations should also verify that exposed application interfaces enforce proper authorization after patching.

PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType

Microsoft CorporationNuance Powerscribe 360application

Microsoft CorporationNuance Powerscribe Oneapplication

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

8 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

8 SOURCESView more in app

sophos threat researchNews

Jan 1, 2026

Microsoft primes 71 fixes for May Patch Tuesday | SOPHOS

A critical information disclosure vulnerability in Nuance PowerScribe 360 involving exposure of sensitive information including PII. Microsoft assesses exploitation as more likely within 30 days.

crowdstrike blogNews

Nov 12, 2025

November 2025 Patch Tuesday: One Zero-Day and Five Critical Vulnerabilities Among 63 CVEs

A critical information disclosure vulnerability in Nuance PowerScribe products due to missing authorization, allowing unauthenticated remote attackers to access sensitive configuration data.

talosintelligence otherNews

Nov 11, 2025

Microsoft Patch Tuesday for November 2025 - Snort rules and prominent vulnerabilities

An information disclosure vulnerability in Nuance PowerScribe 360 caused by missing authorization, allowing unauthenticated attackers to access sensitive information including PII via a specific API endpoint.

talos intelligence blogNews

May 13, 2025

Microsoft Patch Tuesday for May 2025 — Snort rules and prominent vulnerabilities

An information disclosure vulnerability in Nuance PowerScribe 360 assessed as exploitation more likely.

What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets are affected, which adversaries are exploiting it right now, which detections to deploy, and what to do tonight.

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Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity4

Community discussion across Reddit, Mastodon, and other social sources.

EXTERNAL REFERENCES

MITRE CVE

cve.org · CVE-2025-30398

NVD

nvd.nist.gov/vuln/detail/CVE-2025-30398

MITRE CWE · CWE-862

Missing Authorization

Vendor Advisory

msrc.microsoft.com/update-guide/vulnerability/CVE-2025-30398