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Full vulnerability report · 2025
CVE-2025-26682High confidence

ASP.NET Core and Visual Studio Denial of Service Vulnerability

Microsoft · ASP.NET Core 8.0

7.5HighCVSS 3.1
Recommended action
Within 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available
Distribution package intelligence

Ubuntu vendor package status

Canonical’s release and source-package findings are shown separately from local repository availability.

1 package state
Repository candidate not checked

A published vendor fix does not prove that a matching update is enabled and installable on a particular asset. Confirm the local package candidate before scheduling remediation.

Ubuntu releaseSource packageVendor stateFixed versionEvidence
Ubuntu 24.04 LTSnoble · standard archivedotnet8Vendor fix publishedCanonical reports that a fixed source package version has been published. Repository candidate availability is not checked by BlackTree.8.0.115-8.0.15-0ubuntu1~24.04.1Canonical record ↗Source updated 11 Sept 2026
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-2025-10197

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

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
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionWithin 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available
01

What, why and how

Allocation of resources without limits or throttling in ASP.NET Core allows an unauthorized attacker to deny service over a network.

What

Allocation of resources without limits or throttling in ASP.NET Core allows an unauthorized attacker to deny service over a network.

Why

The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

Allocation of resources without limits or throttling in ASP.NET Core allows an unauthorized attacker to deny service over a network.

Why

The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

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 → Allocation of Resources Without Limits or Throttling → cause the confidentiality, integrity or availability impact described by the vendor
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-770

CWE-770: Allocation of Resources Without Limits or Throttling. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.

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:N/I:N/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.CNoneConfidentiality impact: No direct loss is represented by this metric.INoneIntegrity impact: No direct loss is represented by this metric.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkUnauthenticatedCWE-770
A

Official authority intelligence

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

BSI · German · WID-SEC-2025-0748Microsoft DeveloperTools: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in Microsoft Visual Studio Code, Microsoft ASP.NET, Microsoft Visual Studio 2022 und Microsoft Visual Studio ausnutzen, um seine Privilegien zu erhöhen und einen Denial-of-Service-Zustand zu verursachen.

Official advisory ↗
Cyber Security Agency of Singapore · English · CSA-SB-20250409Security Bulletin 09 April 2025 [903 KB]

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 09 April 2025 [903 KB], published on 9 April 2025. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2025-AVI-0291Multiples vulnérabilités dans les produits Microsoft

De multiples vulnérabilités ont été découvertes dans les produits Microsoft. Certaines d'entre elles permettent à un attaquant de provoquer une exécution de code arbitraire à distance, une élévation de privilèges et un déni de service à distance.

Official advisory ↗
CERT-FR · French · CERTFR-2025-AVI-0289Vulnérabilité dans Microsoft .Net

Une vulnérabilité a été découverte dans Microsoft .Net. Elle permet à un attaquant de provoquer un déni de service à distance.

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2025-009054マイクロソフトの ASP.NET Core および Microsoft Visual Studio におけるサービス運用妨害 (DoS) の脆弱性

マイクロソフトの ASP.NET Core および Microsoft Visual Studio には、サービス運用妨害 (DoS) の脆弱性が存在します。

Official advisory ↗
KISA KrCERT/CC · Korean · KNVD-6441MS 4월 보안 위협에 따른 정기 보안 업데이트 권고

스 거부 취약성 | | Windows Standards-Based Storage Management Service | CVE-2025-27470 | Windows 표준 스토리지 관리 서비스 서비스 거부 취약성 | | Windows LDAP - Lightweight Directory Access Protocol | CVE-2025-27469 | Windows LDAP(Lightweight Directory Access Protocol) 서비스 거부 취약성 | | Windows Digital Media | CVE-2025-27467 | Windows 디지털 미디어 권한 상승 취약성 | | Microsoft Virtual Hard Drive | CVE-2025-26688 | Microsoft 가상 하드 디스크 권한 상승 취약성 | | Windows Win32K - GRFX | CVE-2025-26687 | Win32k 권한 상승 취약성 | | Windows TCP/IP | CVE-2025-26686 | Windows TCP/IP 원격 코드 실행 취약성 | | Azure Playwright | CVE-2025-26683 | Azure Playwright Elevation of Privilege Vulnerability | | ASP.NET Core | CVE-2025-26682 | ASP.NET Core 및 Visual Studio 서비스 거부 취약성 | | Windows Win32K - GRFX | CVE-2025-26681 | Win32k 권한 상승 취약성 | | Windows Standards-Based Storage Management Service | CVE-2025-26680 | Windows 표준 스토리지 관리 서비스 서비스 거부 취약성 | | RPC Endpoint Mapper Service | CVE-2025-26679 | RPC 끝점 매퍼 서비스 권한 상승 취약성 | | Windows Defender Application Control (WDAC) | CVE-2025-26678 | Windows Defender Application Control 보안 기능 우회 취약성 | | Windows Routing and Remote Access Service (RRAS) | CVE-2025-26676 | Windows RRAS(Routing and Remote Access Service) 정보 공개 취약성 | | Windows Subsystem for Linux | CVE-2025-26675 | Linux용 Windows 하위 시스템 권한 상승 취약성 | | Windows Media | CVE-2025-266

Official advisory ↗
NCSC-NL · Dutch · NCSC-2025-0110Kwetsbaarheden verholpen in Microsoft Developer Tools

Een kwaadwillende kan de kwetsbaarheden misbruiken om een Denial-of-Service te veroorzaken, zich verhoogde rechten toe te kennen en/of willekeurige code uit te voeren met rechten van de ontwikkelaar. Omdat ontwikkelaars veelal onder verhoogde rechten werken, is niet uit te sluiten dat uitvoer van code kan plaatsvinden met hogere rechten dan gebruikersrechten. ``` Visual Studio: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-29802 | 7,30 | Verkrijgen van verhoogde rechten | | CVE-2025-29803 | 7,30 | Verkrijgen van verhoogde rechten | | CVE-2025-29804 | 7,30 | Verkrijgen van verhoogde rechten | | |----------------|------|-------------------------------------| ASP.NET Core: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-26682 | 7,50 | Denial-of-Service | |----------------|------|-------------------------------------| ```

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 8 Apr 2025 · Last source change 10 Aug 2026, 15:13 UTC · CWE-770 · Allocation of Resources Without Limits or Throttling

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-2025-10197
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 ↗

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
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-2025-26682 · cve.blacktree.nl