VulnerabilityPublished 11 Nov 2025Updated 13 Feb 2026

CVE-2025-30398: Microsoft Nuance PowerScribe 360 version 4.0.1 · Missing Authorization

Affects Microsoft Nuance PowerScribe 360 version 4.0.1Source CVE Database V5

Not known to be exploited · CVSS 8.1 High.

Data as of 26 Oct 2026, 17:16 UTC

CVSS 3.1 base score

8.1High

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.8% chance of exploitation in 30 days – higher than 57% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C

Base metrics

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: Required
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: None

Temporal metrics

Exploit Code Maturity: Unproven
Remediation Level: Official Fix
Report Confidence: Confirmed

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: Required: Successful exploitation of this vulnerability requires a user to take some action before the vulnerability can be exploited.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: High: There is total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact.
Integrity: High: There is a total loss of integrity, or a complete loss of protection. For example, the attacker is able to modify any/all files protected by the impacted component. Alternatively, only some files can be modified, but malicious modification would present a direct, serious consequence to the impacted component.
Availability: None: There is no impact to availability within the impacted component.
Exploit Code Maturity: Unproven: No exploit code is available, or an exploit is theoretical.
Remediation Level: Official Fix: A complete vendor solution is available. Either the vendor has issued an official patch, or an upgrade is available.
Report Confidence: Confirmed: Detailed reports exist, or functional reproduction is possible (functional exploits may provide this). Source code is available to independently verify the assertions of the research, or the author or vendor of the affected code has confirmed the presence of the vulnerability.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 11 Nov 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
NuGetMicrosoft/nuance.powerscribe.360`pkg:nuget/Microsoft/nuance.powerscribe.360`Other threats	Affected =4.0.1	Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Monitor Microsoft and Nuance official channels closely for the release of security patches addressing CVE-2025-30398 and apply them immediately upon availability.
Until patches are available, implement strict network segmentation to isolate Nuance PowerScribe servers from general network access, limiting exposure to trusted internal users only.
Enforce strong access control policies and multi-factor authentication (MFA) for all users accessing the PowerScribe environment to reduce the risk of unauthorized access.
Deploy network intrusion detection and prevention systems (IDS/IPS) with signatures or anomaly detection tuned to identify suspicious activities targeting PowerScribe services.
Conduct regular security audits and vulnerability assessments focusing on authorization mechanisms within healthcare applications.
Educate staff about phishing and social engineering tactics that could trigger the required user interaction for exploitation.
Review and tighten firewall rules to restrict inbound and outbound traffic to only necessary ports and IP addresses related to PowerScribe operations.
Maintain comprehensive logging and monitoring to detect and respond to any unauthorized access attempts promptly.

Description

Missing authorization in Nuance PowerScribe allows an unauthorized attacker to disclose information over a network.

Impact

The primary impact of CVE-2025-30398 is the unauthorized disclosure of sensitive medical information, which can severely compromise patient privacy and violate GDPR and other European data protection laws. Healthcare providers relying on Nuance PowerScribe 360 may face reputational damage, regulatory fines, and legal consequences if patient data is exposed. The integrity of radiology reports could also be at risk if attackers manipulate information, potentially leading to misdiagnosis or treatment errors. Since the vulnerability does not affect availability, service disruption is less likely, but the confidentiality breach alone is critical. European organizations are particularly vulnerable due to the widespread use of PowerScribe in hospitals and diagnostic centers. The exposure of PHI could also facilitate further attacks such as identity theft, insurance fraud, or targeted cyber espionage campaigns. The lack of authentication requirement and network accessibility make the attack feasible for remote adversaries, increasing the threat landscape for European healthcare institutions.

CWE-862Missing Authorization (opens in a new tab)
Class weaknessLikelihood of exploit: HighCWE Top 25 (2025): #4OWASP Top 10 A01:2025: Broken Access Control (opens in a new tab)
The product does not perform an authorization check when an actor attempts to access a resource or perform an action.
Architecture and Design
Divide the product into anonymous, normal, privileged, and administrative areas. Reduce the attack surface by carefully mapping roles with data and functionality. Use role-based access control (RBAC) to enforce the roles at the appropriate boundaries.
Architecture and Design
Ensure that access control checks are performed related to the business logic. These checks may be different than the access control checks that are applied to more generic resources such as files, connections, processes, memory, and database records.
Architecture and Design · Libraries or Frameworks
Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
OWASP Cheat Sheets
Authorization (opens in a new tab)
OWASP ASVS 4.0.3
V8.3.8 (opens in a new tab)
V13.4.2 (opens in a new tab)
V7.2.2 (opens in a new tab)
Attack patterns
Exploitation of Thunderbolt Protection Flaws (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2025-30398 (opens in a new tab)

Community reviews

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 14 Feb 2026, 07:15 UTC

WeaknessesCWE-862

Technical details

References

Community reviews

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