CVE-2025-62858 | QTS, QuTS hero

A buffer overflow 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 modify memory or crash processes. 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

Published: 2026-06-09 Last update: 2026-06-12 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-62858 is rated Low Risk (28.2/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.30%). 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-2025-62858

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 0.12% 0.30% +0.18%
2 2026-06-09 — 0.12% —

Full EPSS history (2 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-62858

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.1 4.0 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:L/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 Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network.
Attack complexity (AC:L)
Exploitation conditions are straightforward and stable.
Attack requirements (AT:N)
No additional preconditions are required beyond normal reachability.
Privileges required (PR:H)
High privileges are required.
User interaction (UI:N)
No user interaction is required.
Vulnerable system confidentiality impact (VC:N)
No confidentiality impact on the vulnerable system.
Vulnerable system integrity impact (VI:L)
Limited integrity impact on the vulnerable system.
Vulnerable system availability impact (VA:L)
Limited availability impact on the vulnerable system.
Subsequent system confidentiality impact (SC:N)
No confidentiality impact on subsequent systems.
Subsequent system integrity impact (SI:N)
No integrity impact on subsequent systems.
Subsequent system availability impact (SA:N)
No availability impact on subsequent systems.
Exploit maturity (threat) (E:X)
Not defined: no reliable threat intelligence; scoring assumes the worst case (equivalent to Attacked).
Confidentiality requirement (CR:X)
Not defined: insufficient information; scoring treats this like High (worst case).
Integrity requirement (IR:X)
Not defined: insufficient information; scoring treats this like High (worst case).
Availability requirement (AR:X)
Not defined: insufficient information; scoring treats this like High (worst case).
Modified attack vector (MAV:X)
Not defined: scoring uses the Base Attack Vector (AV).
Modified attack complexity (MAC:X)
Not defined: scoring uses the Base Attack Complexity (AC).
Modified attack requirements (MAT:X)
Not defined: scoring uses the Base Attack Requirements (AT).
Modified privileges required (MPR:X)
Not defined: scoring uses the Base Privileges Required (PR).
Modified user interaction (MUI:X)
Not defined: scoring uses the Base User Interaction (UI).
Modified vulnerable system confidentiality impact (MVC:X)
Not defined: scoring uses the Base VC metric.
Modified vulnerable system integrity impact (MVI:X)
Not defined: scoring uses the Base VI metric.
Modified vulnerable system availability impact (MVA:X)
Not defined: scoring uses the Base VA metric.
Modified subsequent system confidentiality impact (MSC:X)
Not defined: scoring uses the Base SC metric.
Modified subsequent system integrity impact (MSI:X)
Not defined: scoring uses the Base SI metric.
Modified subsequent system availability impact (MSA:X)
Not defined: scoring uses the Base SA metric.
Safety (supplemental) (S:X)
Not evaluated.
Automatable (supplemental) (AU:X)
Not evaluated.
Recovery (supplemental) (R:X)
Not evaluated.
Value density (supplemental) (V:X)
Not evaluated.
Vulnerability response effort (supplemental) (RE:X)
Not evaluated.
Provider urgency (supplemental) (U:X)
Not evaluated.
 — — [email protected]
6.5 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/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:N)
Doesn’t really leak secrets in a meaningful 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 5.2 [email protected]

Weakness enumeration for CVE-2025-62858

GitHub Security Advisory for CVE-2025-62858

GHSA-prxr-642c-c266 · Severity: medium — A buffer overflow vulnerability has been reported to affect several QNAP operating system...

Affected software / configurations for CVE-2025-62858

Vendor Product Version Raw CPE
qnap qts 5.2.0.2737 cpe:2.3:o:qnap:qts:5.2.0.2737:build_20240417:*:*:*:*:*:*
qnap qts 5.2.0.2744 cpe:2.3:o:qnap:qts:5.2.0.2744:build_20240424:*:*:*:*:*:*
qnap qts 5.2.0.2782 cpe:2.3:o:qnap:qts:5.2.0.2782:build_20240601:*:*:*:*:*:*
qnap qts 5.2.0.2802 cpe:2.3:o:qnap:qts:5.2.0.2802:build_20240620:*:*:*:*:*:*
qnap qts 5.2.0.2823 cpe:2.3:o:qnap:qts:5.2.0.2823:build_20240711:*:*:*:*:*:*
qnap qts 5.2.0.2851 cpe:2.3:o:qnap:qts:5.2.0.2851:build_20240808:*:*:*:*:*:*
qnap qts 5.2.0.2860 cpe:2.3:o:qnap:qts:5.2.0.2860:build_20240817:*:*:*:*:*:*
qnap qts 5.2.1.2930 cpe:2.3:o:qnap:qts:5.2.1.2930:build_20241025:*:*:*:*:*:*
qnap qts 5.2.2.2950 cpe:2.3:o:qnap:qts:5.2.2.2950:build_20241114:*:*:*:*:*:*
qnap qts 5.2.3.3006 cpe:2.3:o:qnap:qts:5.2.3.3006:build_20250108:*:*:*:*:*:*
qnap qts 5.2.4.3070 cpe:2.3:o:qnap:qts:5.2.4.3070:build_20250312:*:*:*:*:*:*
qnap qts 5.2.4.3079 cpe:2.3:o:qnap:qts:5.2.4.3079:build_20250321:*:*:*:*:*:*
qnap qts 5.2.4.3092 cpe:2.3:o:qnap:qts:5.2.4.3092:build_20250403:*:*:*:*:*:*
qnap qts 5.2.5.3145 cpe:2.3:o:qnap:qts:5.2.5.3145:build_20250526:*:*:*:*:*:*
qnap qts 5.2.6.3195 cpe:2.3:o:qnap:qts:5.2.6.3195:build_20250715:*:*:*:*:*:*
qnap qts 5.2.6.3229 cpe:2.3:o:qnap:qts:5.2.6.3229:build_20250818:*:*:*:*:*:*
qnap qts 5.2.7.3256 cpe:2.3:o:qnap:qts:5.2.7.3256:build_20250913:*:*:*:*:*:*
qnap qts 5.2.7.3297 cpe:2.3:o:qnap:qts:5.2.7.3297:build_20251024:*:*:*:*:*:*
qnap qts 5.2.8.3332 cpe:2.3:o:qnap:qts:5.2.8.3332:build_20251128:*:*:*:*:*:*
qnap qts 5.2.8.3350 cpe:2.3:o:qnap:qts:5.2.8.3350:build_20251216:*:*:*:*:*:*
qnap qts 5.2.8.3359 cpe:2.3:o:qnap:qts:5.2.8.3359:build_20251225:*:*:*:*:*:*
qnap quts_hero h5.2.0.2737 cpe:2.3:o:qnap:quts_hero:h5.2.0.2737:build_20240417:*:*:*:*:*:*
qnap quts_hero h5.2.0.2782 cpe:2.3:o:qnap:quts_hero:h5.2.0.2782:build_20240601:*:*:*:*:*:*
qnap quts_hero h5.2.0.2789 cpe:2.3:o:qnap:quts_hero:h5.2.0.2789:build_20240607:*:*:*:*:*:*
qnap quts_hero h5.2.0.2802 cpe:2.3:o:qnap:quts_hero:h5.2.0.2802:build_20240620:*:*:*:*:*:*
qnap quts_hero h5.2.0.2823 cpe:2.3:o:qnap:quts_hero:h5.2.0.2823:build_20240711:*:*:*:*:*:*
qnap quts_hero h5.2.0.2851 cpe:2.3:o:qnap:quts_hero:h5.2.0.2851:build_20240808:*:*:*:*:*:*
qnap quts_hero h5.2.0.2860 cpe:2.3:o:qnap:quts_hero:h5.2.0.2860:build_20240817:*:*:*:*:*:*
qnap quts_hero h5.2.1.2929 cpe:2.3:o:qnap:quts_hero:h5.2.1.2929:build_20241025:*:*:*:*:*:*
qnap quts_hero h5.2.1.2940 cpe:2.3:o:qnap:quts_hero:h5.2.1.2940:build_20241105:*:*:*:*:*:*
qnap quts_hero h5.2.2.2952 cpe:2.3:o:qnap:quts_hero:h5.2.2.2952:build_20241116:*:*:*:*:*:*
qnap quts_hero h5.2.3.3006 cpe:2.3:o:qnap:quts_hero:h5.2.3.3006:build_20250108:*:*:*:*:*:*
qnap quts_hero h5.2.4.3070 cpe:2.3:o:qnap:quts_hero:h5.2.4.3070:build_20250312:*:*:*:*:*:*
qnap quts_hero h5.2.4.3079 cpe:2.3:o:qnap:quts_hero:h5.2.4.3079:build_20250321:*:*:*:*:*:*
qnap quts_hero h5.2.5.3138 cpe:2.3:o:qnap:quts_hero:h5.2.5.3138:build_20250519:*:*:*:*:*:*
qnap quts_hero h5.2.6.3195 cpe:2.3:o:qnap:quts_hero:h5.2.6.3195:build_20250715:*:*:*:*:*:*
qnap quts_hero h5.2.7.3256 cpe:2.3:o:qnap:quts_hero:h5.2.7.3256:build_20250913:*:*:*:*:*:*
qnap quts_hero h5.2.7.3297 cpe:2.3:o:qnap:quts_hero:h5.2.7.3297:build_20251024:*:*:*:*:*:*
qnap quts_hero h5.2.8.3321 cpe:2.3:o:qnap:quts_hero:h5.2.8.3321:build_20251117:*:*:*:*:*:*
qnap quts_hero h5.2.8.3350 cpe:2.3:o:qnap:quts_hero:h5.2.8.3350:build_20251216:*:*:*:*:*:*
qnap quts_hero h5.2.8.3359 cpe:2.3:o:qnap:quts_hero:h5.2.8.3359:build_20251225:*:*:*:*:*:*
qnap quts_hero h5.3.0.3115 cpe:2.3:o:qnap:quts_hero:h5.3.0.3115:build_20250430:*:*:*:*:*:*
qnap quts_hero h5.3.0.3145 cpe:2.3:o:qnap:quts_hero:h5.3.0.3145:build_20250530:*:*:*:*:*:*
qnap quts_hero h5.3.0.3192 cpe:2.3:o:qnap:quts_hero:h5.3.0.3192:build_20250716:*:*:*:*:*:*
qnap quts_hero h5.3.1.3250 cpe:2.3:o:qnap:quts_hero:h5.3.1.3250:build_20250912:*:*:*:*:*:*
qnap quts_hero h5.3.1.3292 cpe:2.3:o:qnap:quts_hero:h5.3.1.3292:build_20251024:*:*:*:*:*:*
qnap quts_hero h5.3.2.3354 cpe:2.3:o:qnap:quts_hero:h5.3.2.3354:build_20251225:*:*:*:*:*:*
qnap quts_hero h5.3.3.3424 cpe:2.3:o:qnap:quts_hero:h5.3.3.3424:build_20260305:*:*:*:*:*:*
qnap quts_hero h6.0.0.3324 cpe:2.3:o:qnap:quts_hero:h6.0.0.3324:build_20251125:*:*:*:*:*:*
qnap quts_hero h6.0.0.3382 cpe:2.3:o:qnap:quts_hero:h6.0.0.3382:build_20260122:*:*:*:*:*:*

References for CVE-2025-62858

cvelogic Threat Intelligence