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High severity8.8NVD Advisory· Published May 21, 2021· Updated Jun 17, 2026

CVE-2021-28798

CVE-2021-28798

Description

A relative path traversal vulnerability has been reported to affect QNAP NAS running QTS and QuTS hero. If exploited, this vulnerability allows attackers to modify files that impact system integrity. QNAP have already fixed this vulnerability in the following versions: QTS 4.5.2.1630 Build 20210406 and later QTS 4.3.6.1663 Build 20210504 and later QTS 4.3.3.1624 Build 20210416 and later QuTS hero h4.5.2.1638 Build 20210414 and later QNAP NAS running QTS 4.5.3 are not affected.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

6
  • Qnap/Qts2 versions
    cpe:2.3:o:qnap:qts:*:*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:o:qnap:qts:*:*:*:*:*:*:*:*range: >=4.3.2.0144,<4.3.3.1624
    • (no CPE)range: QTS 4.5.2.1630 Build 20210406 and later, QTS 4.3.6.1663 Build 20210504 and later, QTS 4.3.3.1624 Build 20210416 and later
  • Qnap/Quts Hero2 versions
    cpe:2.3:o:qnap:quts_hero:*:*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:o:qnap:quts_hero:*:*:*:*:*:*:*:*range: <h4.5.2.1638
    • (no CPE)range: h4.5.2.1638 Build 20210414 and later
  • QNAP Systems Inc./QTSv5
    Range: unspecified
  • QNAP Systems Inc./QuTS herov5
    Range: unspecified

Patches

Vulnerability mechanics

References

1

News mentions

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