CVE-2023-45035 | QTS, QuTS hero, QuTScloud

A buffer copy without checking size of input vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow authenticated administrators to execute code via a network. We have already fixed the vulnerability in the following versions: QTS 5.1.4.2596 build 20231128 and later QuTS hero h5.1.4.2596 build 20231128 and later QuTScloud c5.1.5.2651 and later

Published: 2024-02-02 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-45035 is rated Low Risk (30.7/100): CVSS Low severity, with low exploitation likelihood (EPSS 0.58%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2023-45035

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.08% 0.58% +0.50%
2 2025-11-21 0.76% 0.08% -0.68%
3 2025-11-18 — 0.76% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-45035

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
3.8 3.1 LOW
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:L Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:H)
They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 1.2 2.5 [email protected]
7.2 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:H)
They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.2 5.9 [email protected]

Weakness enumeration for CVE-2023-45035

Affected software / configurations for CVE-2023-45035

Vendor Product Version Raw CPE
qnap qts 5.1.0.2348 cpe:2.3:o:qnap:qts:5.1.0.2348:build_20230325:*:*:*:*:*:*
qnap qts 5.1.0.2399 cpe:2.3:o:qnap:qts:5.1.0.2399:build_20230515:*:*:*:*:*:*
qnap qts 5.1.0.2418 cpe:2.3:o:qnap:qts:5.1.0.2418:build_20230603:*:*:*:*:*:*
qnap qts 5.1.0.2444 cpe:2.3:o:qnap:qts:5.1.0.2444:build_20230629:*:*:*:*:*:*
qnap qts 5.1.0.2466 cpe:2.3:o:qnap:qts:5.1.0.2466:build_20230721:*:*:*:*:*:*
qnap qts 5.1.1.2491 cpe:2.3:o:qnap:qts:5.1.1.2491:build_20230815:*:*:*:*:*:*
qnap qts 5.1.2.2533 cpe:2.3:o:qnap:qts:5.1.2.2533:build_20230926:*:*:*:*:*:*
qnap qts 5.1.3.2578 cpe:2.3:o:qnap:qts:5.1.3.2578:build_20231110:*:*:*:*:*:*
qnap qts 5.1.4.2596 cpe:2.3:o:qnap:qts:5.1.4.2596:-:*:*:*:*:*:*
qnap quts_hero h5.1.0.2409 cpe:2.3:o:qnap:quts_hero:h5.1.0.2409:build_20230525:*:*:*:*:*:*
qnap quts_hero h5.1.0.2424 cpe:2.3:o:qnap:quts_hero:h5.1.0.2424:build_20230609:*:*:*:*:*:*
qnap quts_hero h5.1.0.2453 cpe:2.3:o:qnap:quts_hero:h5.1.0.2453:build_20230708:*:*:*:*:*:*
qnap quts_hero h5.1.0.2466 cpe:2.3:o:qnap:quts_hero:h5.1.0.2466:build_20230721:*:*:*:*:*:*
qnap quts_hero h5.1.1.2488 cpe:2.3:o:qnap:quts_hero:h5.1.1.2488:build_20230812:*:*:*:*:*:*
qnap quts_hero h5.1.2.2534 cpe:2.3:o:qnap:quts_hero:h5.1.2.2534:build_20230927:*:*:*:*:*:*
qnap quts_hero h5.1.3.2578 cpe:2.3:o:qnap:quts_hero:h5.1.3.2578:build_20231110:*:*:*:*:*:*
qnap quts_hero h5.1.4.2596 cpe:2.3:o:qnap:quts_hero:h5.1.4.2596:-:*:*:*:*:*:*
qnap qutscloud c5.1.0.2498 cpe:2.3:o:qnap:qutscloud:c5.1.0.2498:build_20230822:*:*:*:*:*:*

References for CVE-2023-45035

cvelogic Threat Intelligence