How severe is CVE-2026-16139?

CVE-2026-16139 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-16139 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-16139?

CVE-2026-16139 affects Progress Sharefile Storage Zones Controller. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-16139?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2026-16139 published?

CVE-2026-16139 was published on 2026-08-17 and last updated on 2026-09-02.

CVE-2026-16139

CVE-2026-16139 is a high-severity vulnerability in Progress Sharefile Storage Zones Controller with a CVSS 3.x base score of 7.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: High (CVSS 3.x base score 7.2)
EPSS exploit prediction: 1% (59th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Progress Sharefile Storage Zones Controller
Published: 2026-08-17
Last modified: 2026-09-02

Description

In Progress ShareFile Storage Zones Controller versions <= 5.12.5 and <= 6.0.2, an authenticated zone administrator can exploit improper validation in the download preparation flow, enabling attacker-controlled files to be written outside the intended preparation directory. This can lead to remote code execution in v5 versions. Remote code execution is not confirmed on v6 versions.

Frequently asked questions

What is CVE-2026-16139?: In Progress ShareFile Storage Zones Controller versions <= 5.12.5 and <= 6.0.2, an authenticated zone administrator can exploit improper validation in the download preparation flow, enabling attacker-controlled files to be written outside the intended preparation directory. This can lead to remote code execution in v5 versions. Remote code execution is not confirmed on v6 versions.
How severe is CVE-2026-16139?: CVE-2026-16139 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-16139 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-16139?: CVE-2026-16139 affects Progress Sharefile Storage Zones Controller. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-16139?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2026-16139 published?: CVE-2026-16139 was published on 2026-08-17 and last updated on 2026-09-02.

References

https://support.sharefile.com/s/article/ShareFile-Storage-Zone-Controller-SZC-Service-Disruption-Guidance-Login-Issues-and-Access-Information

Affected products (1)

cpe:2.3:a:progress:sharefile_storage_zones_controller:*:*:*:*:*:*:*:*

More vulnerabilities in Progress Sharefile Storage Zones Controller

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CVE-2026-16137 — High (CVSS 7.2): In Progress ShareFile Storage Zones Controller v5.12.5 and below, a party with valid zone credentials can perform path…

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