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Vulnerabilities

Vulnerability · CVE-2025-52863

A buffer overflow vulnerability has been reported to affect several QNAP operating system versions.

Published Jan 2, 2026 · catalog updated Oct 14, 2026 · quts hero

Check if you run it

No confirmed exploitation is on record for CVE-2025-52863. EPSS is 0.36%. Act only if a listed version of quts hero is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Low1.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.36%
Remediation
Advisory link
Affected products
cpe qnap/qts · cpe qnap/quts hero

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

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe qnap/qts5.2.0.2737
  • cpe qnap/quts heroh5.2.0.2737
  • cpe qnap/quts heroh5.2.0.2782
  • cpe qnap/quts heroh5.2.0.2789
  • cpe qnap/quts heroh5.2.0.2802
  • cpe qnap/quts heroh5.2.0.2823
  • cpe qnap/quts heroh5.2.0.2851
  • cpe qnap/quts heroh5.2.0.2860
  • cpe qnap/quts heroh5.2.1.2929

How to fix CVE-2025-52863

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-52863. EPSS is 0.36%. Act only if a listed version of quts hero is installed.

Which versions are affected?

Compare what you have installed with qnap/quts hero h5.2.0.2737; qnap/quts hero h5.2.0.2782; qnap/quts hero h5.2.0.2789; qnap/quts hero h5.2.0.2802. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-120: Classic Buffer Overflow. EPSS 0.36%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Jan 2, 2026 · NIST NVD

    Detected

    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 buil

  2. Oct 14, 2026 · NIST NVD

    Updated

    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 buil

Sources

  • CVE.orgVulnerability recordCVE-2025-52863

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-52863

    30-day exploitation probability 0.4%

    first.org
  • NIST NVDVulnerability recordCVE-2025-52863

    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 ve

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.