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Highest advisory severityLow 1 vendor · 1 advisory

CVE-2026-26239

CVE-2026-26239 is covered by the QNAP QSA-26-10 security bulletin. Not in the CISA KEV catalog. Low advisory severity. 1 advisory from QNAP.

Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.

NVD detail CVE.org

CVE-2026-26239 at a glance

CISA KEV
Not listed (catalog checked )
Highest advisory severity
Low
Vendor advisories
1 from QNAP
VulniPulse record
Published · Updated

Is CVE-2026-26239 exploited?

No exploitation is reported in the sources VulniPulse tracks: CVE-2026-26239 is not in the CISA KEV catalog (checked ) and no tracked advisory for it reports exploitation. That is not proof the vulnerability cannot be exploited.

How do I fix CVE-2026-26239?

This CVE is tracked through a multi-CVE bulletin, so its fixed releases may differ from the bulletin-wide values below. Check the vendor source.

Vendor advisory comparison

QNAP

1 advisory
  • Advisory severityLow1.3

    Low [CVE-2025-59382 +16] buffer overflow vulnerability has been reported to affect File Station 5.

    QSA-26-10Source published Source updated

    This bulletin covers 17 CVEs. The products, versions, score and guidance below describe the bulletin; check its source for applicability to this specific CVE.

    A buffer overflow vulnerability has been reported to affect File Station 5. The remote attackers can then exploit the vulnerability to modify memory or crash processes. We have already fixed the vulnerability in the following version: File Station 5 5.5.6.5243 and later Affected products named by the advisory: QVP 2.7.1; QuTS cloud c5.2.8; QTS version 5.2.7; QuTS hero h5.2.8.

    Affected products in this advisory
    • QVP 2.7.1
    • QuTS cloud c5.2.8
    • QTS version 5.2.7
    • QuTS hero h5.2.8
    Source-reported affected versions
    Affected-version details not available in this record.
    Source-reported fixed versions
    • 5.5.6.5243
    Mitigation guidance
    • Update the affected QNAP app / operating system to a fixed release: QVP 2.8.0, QuTS cloud C5.2.9, QTS version 5.2.9.3499, QuTS hero h5.2.9.
    Full advisory and evidenceOpen source bulletin

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