Affects Microsoft .NET Framework, a widely deployed enterprise platform; network privilege escalation could disrupt many organizations.
CVE-2026-62872
Authorization flaw in .NET enables network-based privilege escalation.
Is CVE-2026-62872 being exploited?
Not confirmed. CVE-2026-62872 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.54% probability of exploitation in the next 30 days.
How severe is CVE-2026-62872?
CVE-2026-62872 is rated High with a CVSS score of 8.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-62872?
Yes. A fix has been recorded for CVE-2026-62872. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-62872 affect?
CVE-2026-62872 affects Microsoft .NET Framework, Windows hosts running .NET applications/services. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-62872?
Apply vendor patch when released; restrict .NET service exposure; enforce least privilege.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authenticated network attacker can elevate privileges on affected hosts (potential SYSTEM-level), enabling code execution, data access, and lateral movement.
Immediate action required
- affected>= 3.5.0 and < 2.0.50727.9183 & 3.0.30729.9169
- affected>= 3.0.0.0 and < 2.0.50727.8984 & 3.0.30729.8980 & 4.7.4144.0
- affected>= 4.7.0 and < 2.0.50727.9070 & 3.0.30729.9068 & 4.7.4144.0
- affected>= 4.8.0 and < 2.0.50727.9070 & 3.0.30729.9068 & 4.8.4805.0
- affected>= 4.8.1 and < 2.0.50727.9183 & 3.0.30729.9169 & 4.8.9343.0
- affected>= 4.7.0 and < 4.7.4144.0
- affected>= 4.8.0 and < 4.8.4805.0
- affected>= 4.8.0.0 and < 4.8.9344.0
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.