Security readout for executives and security teams
Plain-English summary
A local attacker could abuse improper input handling in affected Microsoft .NET installations to gain higher privileges. Successful exploitation requires user interaction but no prior privileges, and could significantly compromise confidentiality and integrity while causing limited availability impact.
Executive priority
Treat as a high-priority patching issue, especially for shared endpoints and systems exposed to untrusted users. It is not evidenced as an emergency internet-scale threat because exploitation is local, requires user interaction, and active exploitation is not established.
Technical view
CVE-2026-35433 is a local elevation-of-privilege flaw involving improper input validation and integer handling (CWE-20 and CWE-190). It carries CVSS 3.1 score 7.3: local access, low complexity, no privileges, user interaction required, unchanged scope, and high confidentiality and integrity impact.
Likely exposure
Exposure applies where the specifically listed .NET 8.0, 9.0, 10.0 or .NET Framework variants are installed. Risk is more relevant on endpoints, shared systems, and servers where an attacker can obtain local access or induce an authorized user to interact.
Exploitation context
The supplied record does not establish active exploitation, and the CVE is not identified as being in CISA KEV. The vector indicates exploitation is local, requires user interaction, needs no prior privileges, and has low attack complexity. Public exploit availability is not established by the supplied sources.
Researcher notes
The public bundle identifies input validation and integer-handling weaknesses but provides insufficient detail to determine the vulnerable component, trigger, or exact privilege boundary. Affected-product entries include combined Framework labels and should be reconciled with Microsoft’s advisory. No exploit procedure, fixed-build matrix, or active exploitation evidence is supplied.
Mitigation direction
- Review the Microsoft advisory and apply its applicable security updates promptly.
- Prioritize affected shared systems and endpoints permitting untrusted local access.
- Restrict unnecessary local and interactive access while remediation is pending.
- Follow vendor guidance for supported update paths; fixed build details are absent from the bundle.
Validation and detection
- Inventory installed .NET runtimes and Framework versions against the affected product list.
- Confirm applicable Microsoft security updates are installed using approved endpoint-management records.
- Re-scan remediated systems and investigate installations that remain on affected versions.
- Verify critical applications still operate correctly after updating .NET components.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-190: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCWE-20: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupPrivilege behavior lookup
The CVE wording references privilege impact, so privilege escalation and authorization behavior review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-35433 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L/E:U/RL:O/RC:C
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
2 official scoresWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L/E:U/RL:O/RC:C1.85.5microsoftCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L1.85.5redhat-SADPVulnerability scoring details
Base CVSS 3.1 score
7.3HighVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L/E:U/RL:O/RC:C
Base CVSS 3.1 score
7.3HighVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- ADP timelineredhat-SADP
Made public.
- CVE publishedCVE Program
The CVE record was published.
- ADP timelineredhat-SADP
Reported to Red Hat.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
- 2026-05-12T18:01:11.848Z: Reported to Red Hat.
- 2026-05-12T16:58:34.612Z: Made public.
Source materials
- CVE List V5 sourceCVE List V5
- .NET Elevation of Privilege VulnerabilityCVE reference, microsoft · vendor-advisory, patch
- https://access.redhat.com/security/cve/CVE-2026-35433CVE reference, redhat-SADP · vdb-entry, x_refsource_REDHAT
- RHBZ#2476577CVE reference, redhat-SADP · issue-tracking, x_refsource_REDHAT
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-35433.jsonCVE reference, redhat-SADP · x_sadp-csaf-vex
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Integer Overflow or Wraparound
Integer Overflow or Wraparound represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
Improper Input Validation
Improper Input Validation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.