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Vulnerabilities

Vulnerability · CVE-2025-62858

CVE-2025-62858 is listed by A buffer overflow vulnerability has been reported to affect several QNAP operating system versions..

Published Jun 9, 2026 · catalog updated Jul 23, 2026 · the affected product

Last checked Nov 9, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-62858. EPSS is 0.45%. Act only if a listed version of the affected product is installed.

Gaps on this record

  • No plain product name is stored. The page cannot tell you which product to check.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Medium5.1
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.45%
Remediation
Advisory link
Affected products
cpe qnap/qts

CVE-2025-62858 is listed by A buffer overflow vulnerability has been reported to affect several QNAP operating system versions..

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe qnap/qts5.2.0.2737
  • cpe qnap/qts5.2.0.2744
  • cpe qnap/qts5.2.0.2782
  • cpe qnap/qts5.2.0.2802
  • cpe qnap/qts5.2.0.2823
  • cpe qnap/qts5.2.0.2851

How to fix CVE-2025-62858

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-62858. EPSS is 0.45%. Act only if a listed version of the affected product is installed.

Which versions are affected?

Compare what you have installed with 5.2.0.2737, 5.2.0.2744, 5.2.0.2782, 5.2.0.2802, 5.2.0.2823, 5.2.0.2851. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-121: Stack-based Buffer Overflow. EPSS 0.45%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

QNAP QTS security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Jun 9, 2026 · Monitored products — high

    Detected

    CVE-2025-62858 is listed by A buffer overflow vulnerability has been reported to affect several QNAP operating system versions..

  2. Jul 23, 2026 · Monitored products — high

    Updated

    CVE-2025-62858 is listed by A buffer overflow vulnerability has been reported to affect several QNAP operating system versions..

Sources

  • CVE.orgVulnerability recordCVE-2025-62858

    Official CVE identifier

    cve.org
  • Monitored products — highVendor advisoryCVE-2025-62858

    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

    nvd.nist.gov

References

Freshness

Last verified in this catalog Nov 9, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • CVE.orgNov 7, 2026
  • Monitored products — highNov 6, 2026