# CVE-2026-47288: Microsoft Windows Kerberos integer overflow remote code execution

Source: https://junglewise.ai/threats/cve-2026-47288-microsoft-windows-kerberos-integer-overflow-remote-code-execution  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-09. Updated: 2026-06-09  
License: CC BY 4.0 with a link back

CVE-2026-47288 · Severity: high · CVSS 7.1 · Published 2026-06-09

A security vulnerability exists in Windows Kerberos, the primary system used for verifying user identities and securing logins across corporate networks. An authorized user on the same local network could exploit this flaw to run unauthorized commands or software on affected systems. This could lead to a complete takeover of the server or workstation, potentially compromising sensitive data and disrupting business operations.

Technologies: [Microsoft Windows Kerberos](https://junglewise.ai/threats/technologies/windows-kerberos). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-47288 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-47288 being exploited in the wild.

**How severe is CVE-2026-47288?** High severity, with a CVSS score of 7.1, published 9 June 2026.

**Which products and versions are affected?** Microsoft Windows Kerberos.

**Is there a fix for CVE-2026-47288?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-47288 attacked?** It is attacked from the adjacent network, in an operating system.

**Am I affected by CVE-2026-47288?** Check whether you run Microsoft Windows Kerberos. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

An integer overflow vulnerability (CWE-190) exists within the Microsoft Windows Kerberos implementation. The flaw is triggered during the processing of Kerberos authentication requests, where improper bounds checking leads to a memory corruption condition. An attacker must be authenticated (Low privileges) and positioned on an adjacent network to exploit the vulnerability. Successful exploitation allows for remote code execution (RCE) in the context of the Kerberos service. The attack complexity is rated as high, suggesting specific timing or environmental conditions are required for a successful exploit.

## Affected products

- Microsoft Windows Kerberos

## Timeline

- 2026-06-09: disclosed
- 2026-06-09: advisory

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-47288](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-47288)

## Related threats

- [Windows Kerberos use-after-free privilege escalation](https://junglewise.ai/threats/cve-2026-70241-use-after-free-in-windows-kerberos-allows-an-authorized-attacker)
- [Microsoft Windows Kerberos authentication bypass](https://junglewise.ai/threats/cve-2026-69676-microsoft-windows-kerberos-authentication-bypass)
- [Microsoft Windows Kerberos null pointer dereference denial of service](https://junglewise.ai/threats/cve-2026-42903-microsoft-windows-kerberos-null-pointer-dereference-denial-of)