# CVE-2025-52864: A buffer overflow vulnerability has been reported to affect several QNAP operating system versions. If a remote…

Source: https://junglewise.ai/threats/cve-2025-52864-a-buffer-overflow-vulnerability-has-been-reported-to-affect  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-01-02  
License: CC BY 4.0 with a link back

CVE-2025-52864 · Severity: high · CVSS 8.1 · Published 2026-01-02

A buffer overflow vulnerability has been reported to affect several QNAP operating system versions. If a remote attacker gains a user account, they can then exploit the vulnerability to modify memory or crash processes.

We have already fixed the vulnerability in the following versions:
QTS 5.2.7.3256 build 20250913 and later
QuTS hero h5.2.7.3256 build 20250913 and later
QuTS hero h5.3.0.3192 build 20250716 and later

Technologies: [QNAP QTS](https://junglewise.ai/threats/technologies/qts), [QNAP Quts Hero](https://junglewise.ai/threats/technologies/qnap-quts-hero). Vendors: [QNAP](https://junglewise.ai/threats/vendors/qnap).

## Quick answers

**Is CVE-2025-52864 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-52864 being exploited in the wild.

**How severe is CVE-2025-52864?** High severity, with a CVSS score of 8.1, published 2 January 2026.

**Which products and versions are affected?** QNAP QTS, QNAP Quts Hero. The advisory does not name versions.

**Is there a fix for CVE-2025-52864?** 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.

**Am I affected by CVE-2025-52864?** Check whether you run QNAP QTS or QNAP Quts Hero. 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.

## Affected products

- QNAP QTS
- QNAP Quts Hero

## Related threats

- [QNAP QTS and QuTS hero path traversal](https://junglewise.ai/threats/cve-2026-24717-qnap-qts-and-quts-hero-path-traversal)
- [QNAP QTS and QuTS hero NULL pointer dereference DoS](https://junglewise.ai/threats/cve-2026-24716-qnap-qts-and-quts-hero-null-pointer-dereference-dos)
- [QNAP QTS and QuTS hero command injection](https://junglewise.ai/threats/cve-2026-22893-qnap-qts-and-quts-hero-command-injection)
- [QNAP QTS and QuTS hero command injection](https://junglewise.ai/threats/cve-2025-66273-qnap-qts-and-quts-hero-command-injection)
- [QNAP QTS and QuTS web parameter manipulation](https://junglewise.ai/threats/cve-2025-59382-qnap-qts-and-quts-web-parameter-manipulation)