# CVE-2024-53691: QTS, QuTS hero

Status: published. Published: 2024-12-06. Updated: 2026-11-03.

A link following vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow remote attackers who have gained user access to traverse the file system to unintended locations.

We have already fixed the vulnerability in the following versions:
QTS 5.1.8.2823 build 20240712 and later
QTS 5.2.0.2802 build 20240620 and later
QuTS hero h5.1.8.2823 build 20240712 and later
QuTS hero h5.2.0.2802 build 20240620 and later

## Remediation

- fix: We have already fixed the vulnerability in the following versions:
QTS 5.1.8.2823 build 20240712 and later
QTS 5.2.0.2802 build 20240620 and later
QuTS hero h5.1.8.2823 build 20240712 and later
QuTS hero h5.2.0.2802 build 20240620 and later (source: CNA: qnap)

## Affected products and versions

- QNAP Systems Inc. / QTS: ≥ 5.1.x; < 5.1.8.2823 build 20240712 (affected, custom); ≥ 5.2.x; < 5.2.0.2802 build 20240620 (affected, custom). Source: CNA: qnap
- QNAP Systems Inc. / QuTS hero: ≥ h5.1.x; < h5.1.8.2823 build 20240712 (affected, custom); ≥ h5.2.x; < h5.2.0.2802 build 20240620 (affected, custom). Source: CNA: qnap
- qnap / qts: ≥ 5.1.x; < 5.1.8.2823 build 20240712 (affected, custom); ≥ 5.2.x; < 5.2.0.2802 build 20240620 (affected, custom). Source: ADP: CISA-ADP
- qnap / quts_hero: ≥ h5.1.x; < h5.1.8.2823 build 20240712 (affected, custom); ≥ h5.2.x; < h5.2.0.2802 build 20240620 (affected, custom). Source: ADP: CISA-ADP

## NVD configuration conditions

Affected CPE matches depend on the following AND/OR and negation conditions:

```json
[
  {
    "negate": false,
    "nodes": [
      {
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:o:qnap:qts:5.1.0.2348:build_20230325:*:*:*:*:*:*",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:qnap:qts:5.1.0.2399:build_20230515:*:*:*:*:*:*",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:qnap:qts:5.1.0.2418:build_20230603:*:*:*:*:*:*",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:qnap:qts:5.1.0.2444:build_20230629:*:*:*:*:*:*",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:qnap:qts:5.1.0.2466:build_20230721:*:*:*:*:*:*",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:qnap:qts:5.1.1.2491:build_20230815:*:*:*:*:*:*",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:qnap:qts:5.1.2.2533:build_20230926:*:*:*:*:*:*",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:qnap:qts:5.1.3.2578:build_20231110:*:*:*:*:*:*",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:qnap:qts:5.1.4.2596:build_20231128:*:*:*:*:*:*",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:qnap:qts:5.1.5.2645:build_20240116:*:*:*:*:*:*",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:qnap:qts:5.1.5.2679:build_20240219:*:*:*:*:*:*",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:qnap:qts:5.1.6.2722:build_20240402:*:*:*:*:*:*",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:qnap:qts:5.1.7.2770:build_20240520:*:*:*:*:*:*",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:qnap:qts:5.2.0.2737:build_20240417:*:*:*:*:*:*",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:qnap:qts:5.2.0.2744:build_20240424:*:*:*:*:*:*",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:qnap:qts:5.2.0.2782:build_20240601:*:*:*:*:*:*",
            "vulnerable": true
          }
        ],
        "negate": false,
        "operator": "OR"
      }
    ],
    "operator": "OR"
  },
  {
    "negate": false,
    "nodes": [
      {
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:o:qnap:quts_hero:h5.1.0.2409:build_20230525:*:*:*:*:*:*",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:qnap:quts_hero:h5.1.0.2424:build_20230609:*:*:*:*:*:*",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:qnap:quts_hero:h5.1.0.2453:build_20230708:*:*:*:*:*:*",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:qnap:quts_hero:h5.1.0.2466:build_20230721:*:*:*:*:*:*",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:qnap:quts_hero:h5.1.1.2488:build_20230812:*:*:*:*:*:*",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:qnap:quts_hero:h5.1.2.2534:build_20230927:*:*:*:*:*:*",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:qnap:quts_hero:h5.1.3.2578:build_20231110:*:*:*:*:*:*",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:qnap:quts_hero:h5.1.4.2596:build_20231128:*:*:*:*:*:*",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:qnap:quts_hero:h5.1.5.2647:build_20240118:*:*:*:*:*:*",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:qnap:quts_hero:h5.1.5.2680:build_20240220:*:*:*:*:*:*",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:qnap:quts_hero:h5.1.6.2734:build_20240414:*:*:*:*:*:*",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:qnap:quts_hero:h5.1.7.2770:build_20240520:*:*:*:*:*:*",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:qnap:quts_hero:h5.1.7.2788:build_20240607:*:*:*:*:*:*",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:qnap:quts_hero:h5.1.7.2794:build_20240613:*:*:*:*:*:*",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:qnap:quts_hero:h5.2.0.2737:build_20240417:*:*:*:*:*:*",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:qnap:quts_hero:h5.2.0.2782:build_20240601:*:*:*:*:*:*",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:qnap:quts_hero:h5.2.0.2789:build_20240607:*:*:*:*:*:*",
            "vulnerable": true
          }
        ],
        "negate": false,
        "operator": "OR"
      }
    ],
    "operator": "OR"
  }
]
```

## Severity and prioritization

- CVSS 4.0: 8.7 (high); CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N; source: CNA: qnap

- CVSS 4.0: 8.7 (high); CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X; source: NVD: security@qnapsecurity.com.tw

- CVSS 3.1: 8.8 (high); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H; source: NVD: nvd@nist.gov

- CISA KEV: No listing in collected sources

- EPSS: 23.76% as of 2026-11-03; percentile 97.82%

- SSVC: exploitation poc; automatable no; technical impact total; source ADP: CISA-ADP

- Weaknesses: CWE-59

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://www.qnap.com/en/security-advisory/qsa-24-28 (CNA: qnap)

- https://www.qnap.com/en/security-advisory/qsa-24-28 (security@qnapsecurity.com.tw; Vendor Advisory)

## Provenance

- CNA: qnap: https://www.cve.org/CVERecord?id=CVE-2024-53691; retrieved 2026-11-03; source updated 2026-11-03

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-53691; retrieved 2026-11-04; source updated 2026-11-03

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2024-53691; retrieved 2026-11-03; source updated Not reported

Revision: 27f60975b95e5ad688c340b0934ebfa531f6766b845533d368940bda04305ce5

Canonical: https://y2.dev/cve/CVE-2024-53691

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