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Full vulnerability report · 2026
CVE-2026-26142High confidence

Nuance PowerScribe Remote Code Execution Vulnerability

Microsoft · Nuance PowerScribe 360 4.0

9.8CriticalCVSS 3.1
Recommended action
Within 72 hours

Critical technical impact with a remotely reachable, unauthenticated path; no CISA KEV confirmation is currently recorded.

Patch available
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2026-35530

No EUVD known-exploited evidence

Deserialization of untrusted data in Nuance PowerScribe allows an unauthorized attacker to execute code over a network.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
9.8 · CVSS 3.1
Advisory evidence
No linked advisory details stored yet
Recommended actionWithin 72 hours

Critical technical impact with a remotely reachable, unauthenticated path; no CISA KEV confirmation is currently recorded.

Patch available
01

What, why and how

Deserialization of untrusted data in Nuance PowerScribe allows an unauthorized attacker to execute code over a network.

What

Deserialization of untrusted data in Nuance PowerScribe allows an unauthorized attacker to execute code over a network.

Why

Attacker-influenced serialised data is reconstructed as trusted objects, which can invoke dangerous application behaviour.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may execute code or commands in the affected security context.

What

Deserialization of untrusted data in Nuance PowerScribe allows an unauthorized attacker to execute code over a network.

Why

Attacker-influenced serialised data is reconstructed as trusted objects, which can invoke dangerous application behaviour.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may execute code or commands in the affected security context.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
a network path → Deserialization of Untrusted Data → execute code or commands in the affected security context
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-502 ↗

CWE-502: Deserialization of Untrusted Data. The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CHighConfidentiality impact: A successful attack can cause a major loss.IHighIntegrity impact: A successful attack can cause a major loss.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
After compromise, an attacker may use built-in shells, scripting engines, scheduled tasks and native network utilities for discovery, persistence or movement. This is a plausible LoTL path, not evidence that it has occurred for every attack.
NetworkUnauthenticatedRemote code executionCWE-502
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

ENISA EUVD · EUVD-2026-35530Official EUVD mapping

Deserialization of untrusted data in Nuance PowerScribe allows an unauthorized attacker to execute code over a network.

Official EUVD record ↗
CERT-FR · French · CERTFR-2026-AVI-0731Multiples vulnérabilités dans les produits Microsoft

2026 Bulletin de sécurité Microsoft CVE-2026-46236 du 29 mai 2026 Bulletin de sécurité Microsoft CVE-2026-46238 du 29 mai 2026 Bulletin de sécurité Microsoft CVE-2025-15649 du 31 mai 2026 Bulletin de sécurité Microsoft CVE-2026-42789 du 31 mai 2026 Bulletin de sécurité Microsoft CVE-2026-42790 du 31 mai 2026 Bulletin de sécurité Microsoft CVE-2026-48962 du 31 mai 2026 Bulletin de sécurité Microsoft CVE-2026-48959 du 02 juin 2026 Bulletin de sécurité Microsoft CVE-2026-50031 du 04 juin 2026 Bulletin de sécurité Microsoft CVE-2026-46273 du 05 juin 2026 Bulletin de sécurité Microsoft CVE-2026-50292 du 06 juin 2026 Bulletin de sécurité Microsoft CVE-2026-26142 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-33113 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-40371 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-40376 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-42835 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-42902 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-44819 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-44821 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-44824 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-45453 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-45454 du 09 juin 2026 Bulletin de s

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2026-021649マイクロソフトのNuance Powerscribe等の複数製品における信頼できないデータのデシリアライゼーションに関する脆弱性

Nuance PowerScribeにおける信頼されていないデータの逆シリアル化の脆弱性により、未承認の攻撃者がネットワーク経由でコードを実行できます。

Official advisory ↗
KISA KrCERT/CC · Korean · KNVD-6837MS 6월 보안 위협에 따른 정기 보안 업데이트 권고

t SharePoint | 긴급 | 스푸핑 | | Microsoft Exchange Server | 중요 | 스푸핑 | | Microsoft .NET | 중요 | 권한 상승 | | Microsoft Visual Studio | 중요 | 권한 상승 | | Microsoft Dynamics 365 | 중요 | 권한 상승 | | Microsoft Azure | 긴급 | 원격 코드 실행 | | System Center | 중요 | 권한 상승 | [참고 사이트] [1] (한글) https://msrc.microsoft.com/update-guide/ko-kr/ [2] (영문) https://msrc.microsoft.com/update-guide/en-us/ [3] https://msrc.microsoft.com/update-guide/ko-kr/releaseNote/2026-Jun o 취약점 요약 정보 (총 205개) | 제품 카테고리 | CVE 번호 | CVE 제목 | |:---:|:---:|:---:| | Microsoft Windows | CVE-2020-17103 | Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability | | Nuance PowerScribe | CVE-2026-26142 | Nuance PowerScribe Remote Code Execution Vulnerability | | Microsoft Azure Kubernetes Service | CVE-2026-32193 | Azure Kubernetes Service (AKS) Remote Code Execution Vulnerability | | Microsoft Office SharePoint | CVE-2026-33113 | Microsoft SharePoint Server Spoofing Vulnerability | | Microsoft Azure 증명 서비스 및 디바이스 상태 증명 서비스 | CVE-2026-33828 | Windows Device Health Attestation (DHA) Elevation of Privilege Vulnerability | | WinSock용 Windows 보조 기능 드라이버 | CVE-2026-34335 | Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability | | Microsoft Dynamics 365(온-프레미스) | CVE-2026-40371 | Microsoft Dynamics 365 (on-premises)

Official advisory ↗
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Patch available
Affected
Fixed
An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
Action
Review the linked authoritative reference and apply the recorded fixed release appropriate to the affected product branch.
Workaround
No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04

Evidence and provenance

Published 9 Jun 2026 · Last source change 25 Aug 2026, 22:43 UTC · CWE-502 · Deserialization of Untrusted Data

CVE recordCVE.org · 5.2
CVSS sourceCNA
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2026-35530
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceOther authority
NVD statusNVD enriched

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates ↗
  1. BlackTree coverageBlackTree article coverage changed from no BlackTree article to 1 BlackTree article.
    Before
    no BlackTree article
    After
    1 BlackTree article
    BlackTree editorial ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
ENISA EUVD · EUVD-2026-35530↗CVE authority or vendor reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2026-26142 · cve.blacktree.nl