Public proof of conceptFix available

CVE-2024-53691

Q: Is CVE-2024-53691 actively exploited?

Active exploitation of CVE-2024-53691 has not been confirmed. Its EPSS score was 23.8% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2024-53691?

CVE-2024-53691 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

A public proof of concept exists; no exploitation attested.

Published2024-12-06
Fixed in5.2.0.2802 build 20240620 · 5.1.8.2823 build 20240712
WeaknessCWE-59

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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

Timeline

dates in UTC

2024-12-0617:15CVE publishedNVD
2026-10-2319:23First public proof of conceptPoC-in-GitHub
2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2024-53691?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2024-53691?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

CISA-ADP · NVD

Qnap qts

Branch	Affected	Fixed in	Source
5.2	≥ 5.2.x, < 5.2.0.2802 build 20240620	5.2.0.2802 build 20240620	CISA-ADP
5.1	≥ 5.1.x, < 5.1.8.2823 build 20240712	5.1.8.2823 build 20240712	CISA-ADP
5.1	= 5.1.0.2348	no fix published	NVD
5.1	= 5.1.0.2399	no fix published	NVD
5.1	= 5.1.0.2418	no fix published	NVD
5.1	= 5.1.0.2444	no fix published	NVD
5.1	= 5.1.0.2466	no fix published	NVD
5.1	= 5.1.1.2491	no fix published	NVD
5.1	= 5.1.2.2533	no fix published	NVD
5.1	= 5.1.3.2578	no fix published	NVD
5.1	= 5.1.4.2596	no fix published	NVD
5.1	= 5.1.5.2645	no fix published	NVD

Qnap quts hero

Branch	Affected	Fixed in	Source
—	≥ h5.2.x, < h5.2.0.2802 build 20240620	h5.2.0.2802 build 20240620	CISA-ADP
—	≥ h5.1.x, < h5.1.8.2823 build 20240712	h5.1.8.2823 build 20240712	CISA-ADP
—	= h5.1.0.2409	no fix published	NVD
—	= h5.1.0.2424	no fix published	NVD
—	= h5.1.0.2453	no fix published	NVD
—	= h5.1.0.2466	no fix published	NVD
—	= h5.1.1.2488	no fix published	NVD
—	= h5.1.2.2534	no fix published	NVD
—	= h5.1.3.2578	no fix published	NVD
—	= h5.1.4.2596	no fix published	NVD
—	= h5.1.5.2647	no fix published	NVD
—	= h5.1.5.2680	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Qnap qts to 5.2.0.2802 build 20240620 · 5.1.8.2823 build 20240712

Advisories and patches

www.qnap.comVendor Advisory

Detection

read 2026-10-23 19:24 UTC

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: 1 repository, unverifiedC411e/CVE-2024-53691

Sources

CISA-ADPSSVC decisionpoc2025-01-23
OpenCVESSVC decisionnone—
CNACVSS 4.08.7read 2026-10-23
NVDCVSS 3.18.8read 2026-10-23
CNAweakness (CWE)CWE-59read 2026-10-23
FIRST EPSSEPSS score23.8 %read 2026-10-23
PoC-in-GitHubproof of concept1read 2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 4.0 vector: 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
Published: 2024-12-06
Last Modified: 2026-06-17
NVD status: Analyzed

Frequently asked questions

What is CVE-2024-53691?

Is CVE-2024-53691 actively exploited?

Active exploitation of CVE-2024-53691 has not been confirmed. Its EPSS score was 23.8% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2024-53691?

CVE-2024-53691 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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