Evidence used
- No CISA KEV confirmation is currently recorded.
- EPSS is 0.78% for the current model date.
BlackTreeCVE IntelligenceFull vulnerability report · 2026
CVE-2026-62872High confidence
.NET Framework Elevation of Privilege Vulnerability
Microsoft · Microsoft .NET Framework 3.5
8.8HighCVSS 3.1
Within 7 days
Patch availableHigh technical severity; prioritise exposed affected systems while verifying vendor guidance.
R
Open reassessment dashboard →Operational reassessment
Published severity in operational context
Published severityHigh→Operational priority:High, unchanged from published severity.unchanged
Compensating controls
- Validate the affected product branch and deploy the verified fixed release.
- Restrict the affected network interface to trusted sources where business-safe.
- Monitor vendor guidance and exploitation sources for a material change.
Verification
- Confirm that the asset runs Microsoft Microsoft .NET Framework 3.5 and falls inside the recorded affected range.
- Verify the installed build against the product-specific fixed version after deployment.
- Validate exposure, authentication requirements and compensating controls in the actual environment.
- Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Direct vendor intelligence
1 currentAuthoritative vendor CSAF and VEX advisories
Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.
CVE-2026-62872 · CSAF 2.0 · revision 3 · finalRed Hat Product Securitydotnet: .NET Framework: Elevation of Privilege via incorrect authorization
The vendor explicitly states that these products are not affected by this CVE.
- aspnetcore-runtime-10.0 as a component of Red Hat Enterprise Linux 10
- aspnetcore-runtime-8.0 as a component of Red Hat Enterprise Linux 10
- aspnetcore-runtime-9.0 as a component of Red Hat Enterprise Linux 10
- aspnetcore-runtime-dbg-10.0 as a component of Red Hat Enterprise Linux 10
- aspnetcore-runtime-dbg-8.0 as a component of Red Hat Enterprise Linux 10
- aspnetcore-runtime-dbg-9.0 as a component of Red Hat Enterprise Linux 10
- aspnetcore-targeting-pack-10.0 as a component of Red Hat Enterprise Linux 10
- aspnetcore-targeting-pack-8.0 as a component of Red Hat Enterprise Linux 10
- aspnetcore-targeting-pack-9.0 as a component of Red Hat Enterprise Linux 10
- dotnet-apphost-pack-10.0 as a component of Red Hat Enterprise Linux 10
- dotnet-apphost-pack-8.0 as a component of Red Hat Enterprise Linux 10
- dotnet-apphost-pack-9.0 as a component of Red Hat Enterprise Linux 10
- Summary
- A flaw was found in .NET Framework. An authorized attacker could exploit incorrect authorization over a network to elevate their privileges.
- Remediation
- No remediation text is recorded.
High technical severity; prioritise exposed affected systems while verifying vendor guidance.
Patch available01
What, why and how
Incorrect authorization in .NET Framework allows an authorized attacker to elevate privileges over a network.
What
Incorrect authorization in .NET Framework allows an authorized attacker to elevate privileges over a network.
Why
The application performs an authorisation check, but it does not correctly enforce the required permission boundary.
How
An attacker operating through a network path may attempt exploitation with low privileges. If successful, the issue may gain additional privileges.
What
Incorrect authorization in .NET Framework allows an authorized attacker to elevate privileges over a network.
Why
The application performs an authorisation check, but it does not correctly enforce the required permission boundary.
How
An attacker operating through a network path may attempt exploitation with low privileges. If successful, the issue may gain additional privileges.
02
Exploit reality and attack path
CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.
Observed exploitation No confirmed evidence
?
Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.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 None recorded
?
Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.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 → Incorrect Authorization → gain additional privileges
- Attack surface
- Network
- Privileges required
- Low: a basic authenticated account is required
- 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-863 ↗
CWE-863: Incorrect Authorization. The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.
- 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:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:CCommon 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.PRLowPrivileges required: The attacker needs basic user-level 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
- 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.
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
- Microsoft .NET Framework 4.8: 4.8.0 < 4.8.4805.0
- Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2: 3.0.0.0 < 2.0.50727.8984 & 3.0.30729.8980 & 4.7.4144.0
- Microsoft .NET Framework 4.8.1: 4.8.0.0 < 4.8.9344.0
- Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2: 4.7.0 < 4.7.4144.0
- Microsoft .NET Framework 3.5 AND 4.7.2: 4.7.0 < 2.0.50727.9070 & 3.0.30729.9068 & 4.7.4144.0
- Microsoft .NET Framework 3.5: 3.5.0 < 2.0.50727.9183 & 3.0.30729.9169
- Microsoft .NET Framework 3.5 AND 4.8.1: 4.8.1 < 2.0.50727.9183 & 3.0.30729.9169 & 4.8.9343.0
- Microsoft .NET Framework 3.5 AND 4.8: 4.8.0 < 2.0.50727.9070 & 3.0.30729.9068 & 4.8.4805.0
- 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.
Official vendor articles12 stored documents
Linked articles are downloaded and versioned as source evidence. A CVE mention or approved update relationship does not, by itself, verify a fix for every product branch.
- September 8, 2026-Security and Quality Rollup for .NET Framework 3.5 for Windows Server 2012 (KB5120716) | Microsoft Support →Original publisher ↗Searchable text snapshot · Captured 16 Oct 2026September 8, 2026-Security and Quality Rollup for .NET Framework 3.5 for Windows Server 2012 (KB5120716) Applies To .NET Note IMPORTANT This update was originally released in the Security and Quality Rollup that’s dated August 11, 2026. This update is included in the Security and Quality Rollup that’s dated September
- August 11, 2026-KB5120747 Cumulative Update for .NET Framework 3.5 for Windows 11, version 26H1 (build 28000) and later | Microsoft Support →Original publisher ↗Searchable text snapshot · Captured 16 Oct 2026August 11, 2026-KB5120747 Cumulative Update for .NET Framework 3.5 for Windows 11, version 26H1 (build 28000) and later Applies To .NET Note Release Date: August 11, 2026 Version: .NET Framework 3.5 The August 11, 2026 update installs the complete .NET Framework 3.5 product for Windows 11, version 26H1 (build vers
- August 11, 2026-Security and Quality Rollup for .NET Framework 4.6.2, 4.7, 4.7.1, 4.7.2 for Windows Server 2012 R2 (KB5120700) | Microsoft Support →Original publisher ↗Searchable text snapshot · Captured 16 Oct 2026August 11, 2026-Security and Quality Rollup for .NET Framework 4.6.2, 4.7, 4.7.1, 4.7.2 for Windows Server 2012 R2 (KB5120700) Applies To .NET Note Revised October 15th, 2026: Add status update to known issue section. Note Applies to: Microsoft .NET Framework 4.6.2 Microsoft .NET Framework 4.7 Microsoft .NET Framewor
- August 11, 2026-KB5120701 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 10 Version 21H2 and Windows 10 Version 22H2 | Microsoft Support →Original publisher ↗Searchable text snapshot · Captured 16 Oct 2026August 11, 2026-KB5120701 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 10 Version 21H2 and Windows 10 Version 22H2 Applies To .NET Note Revised October 15th, 2026: Add status update to known issue section. Note Release Date: August 11, 2026 Version: .NET Framework 3.5 and 4.8 The August 11, 2026 up
- August 11, 2026-KB5120702 Cumulative Update for .NET Framework 4.8 for Windows 10, version 1607 and Windows Server 2016 | Microsoft Support →Original publisher ↗Searchable text snapshot · Captured 16 Oct 2026August 11, 2026-KB5120702 Cumulative Update for .NET Framework 4.8 for Windows 10, version 1607 and Windows Server 2016 Applies To .NET Note Revised October 15th, 2026: Add status update to known issue section. Note Release Date: August 11, 2026 Version: .NET Framework 4.8 The August 11, 2026 update for Windows 10
- August 11, 2026-KB5120703 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 10, version 1809 and Windows Server 2019 | Microsoft Support →Original publisher ↗Searchable text snapshot · Captured 16 Oct 2026August 11, 2026-KB5120703 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 10, version 1809 and Windows Server 2019 Applies To .NET Note Revised October 15th, 2026: Add status update to known issue section. Note Release Date: August 11, 2026 Version: .NET Framework 3.5 and 4.8 The August 11, 2026 updat
- August 11, 2026-Security and Quality Rollup for .NET Framework 4.8 for Windows Server 2012 (KB5120704) | Microsoft Support →Original publisher ↗Searchable text snapshot · Captured 16 Oct 2026August 11, 2026-Security and Quality Rollup for .NET Framework 4.8 for Windows Server 2012 (KB5120704) Applies To .NET Note Revised October 15th, 2026: Add status update to known issue section. Note Applies to: Microsoft .NET Framework 4.8 Important The installation of this Extended Security Update (ESU) might fail w
- August 11, 2026-KB5120705 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows Server 2022 | Microsoft Support →Original publisher ↗Searchable text snapshot · Captured 16 Oct 2026August 11, 2026-KB5120705 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows Server 2022 Applies To .NET Note Revised October 15th, 2026: Add status update to known issue section. Note Release Date: August 11, 2026 Version: .NET Framework 3.5 and 4.8 The August 11, 2026 update for Windows Server 2022 inc
- August 11, 2026-Security and Quality Rollup for .NET Framework 4.8 for Windows Server 2012 R2 (KB5120706) | Microsoft Support →Original publisher ↗Searchable text snapshot · Captured 16 Oct 2026August 11, 2026-Security and Quality Rollup for .NET Framework 4.8 for Windows Server 2012 R2 (KB5120706) Applies To .NET Note Revised October 15th, 2026: Add status update to known issue section. Note Applies to: Microsoft .NET Framework 4.8 Important The installation of this Extended Security Update (ESU) might fai
- August 11, 2026-KB5120708 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 25H2 and Microsoft server operating system 24H2 | Microsoft Support →Original publisher ↗Searchable text snapshot · Captured 16 Oct 2026August 11, 2026-KB5120708 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 25H2 and Microsoft server operating system 24H2 Applies To .NET Note Revised October 15th, 2026: Add status update to known issue section. Note Release Date: August 11, 2026 Version: .NET Framework 3.5 and 4.8.1 Th
- August 11, 2026-KB5120709 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 10 Version 21H2 and Windows 10 Version 22H2 | Microsoft Support →Original publisher ↗Searchable text snapshot · Captured 16 Oct 2026August 11, 2026-KB5120709 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 10 Version 21H2 and Windows 10 Version 22H2 Applies To .NET Note Revised October 15th, 2026: Add status update to known issue section. Note Release Date: August 11, 2026 Version: .NET Framework 3.5 and 4.8.1 The August 11, 202
- August 11, 2026-KB5120710 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 24H2 | Microsoft Support →Original publisher ↗Searchable text snapshot · Captured 16 Oct 2026August 11, 2026-KB5120710 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 24H2 Applies To .NET Note Revised October 15th, 2026: Add status update to known issue section. Note Release Date: August 11, 2026 Version: .NET Framework 3.5 and 4.8.1 The August 11, 2026 update for Windows 11, ve
04
Evidence and provenance
Published 11 Aug 2026 · Last source change 21 Oct 2026, 20:54 UTC · CWE-863 · Incorrect Authorization
CVE recordCVE.org · 5.2
CVSS sourceCNA
EPSS source FIRST · tracked since 2026-08-14
?
The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.European sourceENISA EUVD · EUVD-2026-56680
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
View recent updates ↗What changed after publication
- Affected versionsThe structured affected or fixed version information changed.CNA ↗
- Before
- 3.5.0 < 2.0.50727.9183 & 3.0.30729.9169; 3.0.0.0 < 2.0.50727.8984 & 3.0.30729.8980 & 4.7.4144.0; 4.7.0 < 2.0.50727.9070 & 3.0.30729.9068 & 4.7.4144.0; 4.8.0 < 2.0.50727.9070 & 3.0.30729.9068 & 4.8.4805.0; 4.8.1 < 2.0.50727.9183 & 3.0.30729.9169 & 4.8.9343.0; 4.7.0 < 4.7.4144.0; 4.8.0 < 4.8.4805.0; 4.8.0.0 < 4.8.9344.0 · 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.
- After
- Microsoft .NET Framework 3.5: 3.5.0 < 2.0.50727.9183 & 3.0.30729.9169; Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2: 3.0.0.0 < 2.0.50727.8984 & 3.0.30729.8980 & 4.7.4144.0; Microsoft .NET Framework 3.5 AND 4.7.2: 4.7.0 < 2.0.50727.9070 & 3.0.30729.9068 & 4.7.4144.0; Microsoft .NET Framework 3.5 AND 4.8: 4.8.0 < 2.0.50727.9070 & 3.0.30729.9068 & 4.8.4805.0; Microsoft .NET Framework 3.5 AND 4.8.1: 4.8.1 < 2.0.50727.9183 & 3.0.30729.9169 & 4.8.9343.0; Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2: 4.7.0 < 4.7.4144.0; Microsoft .NET Framework 4.8: 4.8.0 < 4.8.4805.0; Microsoft .NET Framework 4.8.1: 4.8.0.0 < 4.8.9344.0 · 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.
CVE published
Fixed release or patch reference recorded
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.