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High severity7.2NVD Advisory· Published Jun 10, 2026· Updated Jun 15, 2026

CVE-2025-66280

CVE-2025-66280

Description

An integer overflow or wraparound vulnerability has been reported to affect several QNAP operating system versions. If a remote attacker gains an administrator account, they can then exploit the vulnerability to compromise the security of the system.

We have already fixed the vulnerability in the following versions: QTS 5.2.9.3410 build 20260214 and later QuTS hero h5.2.9.3410 build 20260214 and later QuTS hero h5.3.4.3500 build 20260520 and later QuTS hero h6.0.0.3397 build 20260206 and later

Affected products

4
  • Qnap/Qts2 versions
    cpe:2.3:o:qnap:qts:*:*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:o:qnap:qts:*:*:*:*:*:*:*:*range: >=5.2.0.2737,<5.2.9.3410
    • (no CPE)range: <5.2.9.3410
  • Qnap/Quts Hero2 versions
    cpe:2.3:o:qnap:quts_hero:*:*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:o:qnap:quts_hero:*:*:*:*:*:*:*:*range: >=h5.2.0.2737,<h5.2.9.3410
    • (no CPE)range: <h5.2.9.3410, <h5.3.4.3500, <h6.0.0.3397

Patches

Vulnerability mechanics

References

1

News mentions

3