Windows License Manager CVE-2026-62777

The attacker must hold a valid low-privileged local user account on the target Windows system - confirmed by CVSS PR:L. No special configuration, no non-default feature, and no specific software installation beyond standard Windows is required; the License Manager is a built-in OS component. Remote unauthenticated exploitation is not possible - AV:L explicitly limits the attack surface to local sessions (interactive, RDP, or similar authenticated local access). Exploitation is limited to Windows builds listed in the affected versions; fully patched systems are not vulnerable. What limits risk in practice: the attacker must first achieve local session access, meaning this is a privilege escalation step in a chain, not a standalone remote entry point.

The CVSS 3.1 score of 7.8 (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) accurately reflects a high-severity local privilege escalation: attack complexity is low, no user interaction is needed, and the impact on confidentiality, integrity, and availability is complete once privilege is escalated. The local attack vector (AV:L) is the primary limiting factor - remote unauthenticated exploitation is not possible per the vector. No EPSS score was provided in the intelligence feed, so probabilistic exploitation likelihood cannot be quantified here. The absence of a CISA KEV listing and no identified public exploit code reduces immediate urgency compared to remotely exploitable flaws; however, local privilege escalation vulnerabilities are a staple of post-initial-compromise attacker toolkits and are routinely chained with initial access vectors (phishing, RCE). Given the ubiquitous Windows footprint and the very low attack complexity once local access exists, this should be treated as a high-priority patch in any environment where multi-tenant or shared-access Windows systems exist (e.g., VDI, RDS, server farms, developer workstations). No data conflicts are present in the available intelligence.

An attacker who has gained a foothold as a standard low-privileged Windows user - whether through phishing, credential theft, or an initial-access exploit - calls the unprotected critical function within the License Manager component without needing to supply elevated credentials. Because the authentication check is absent (CWE-306), the request is processed with full SYSTEM-level authority, granting the attacker complete control over the host. No public exploit code has been identified at time of analysis, but the low complexity makes this straightforward to weaponize post-initial-access.