CVE Intelligence
High Insecure deserialization

CVE-2026-16138 — Deserialization of Untrusted Data in Progress Sharefile Storage Zones Controller

In Progress ShareFile Storage Zones Controller v5.12.5 and below versions, unsafe deserialization of untrusted file metadata can allow a user with write access to a Network share to execute arbitrary code on the Storage Zones Controller host.

Published Aug 17, 2026 · Updated Oct 15, 2026 · Sources: NIST National Vulnerability Database · CNA: security@progress.com

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.
How the score was calculated
  • Technical severity (high)+6

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation
Not confirmed
Not in CISA KEV — an absence of record, not proof it is unexploited.
EPSS FIRST
—
No EPSS score.
Affects
Progress
Sharefile Storage Zones Controller
CVSS base
8.0
High · 1 source(s)

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

  1. Identify exposed assets running the affected vendor/product/version combinations (Progress Sharefile Storage Zones Controller).
  2. No fix documented in the sources: reduce exposure and monitor the vendor advisory.
  3. Search available logs for exploit probes matching the vulnerability class (insecure deserialization), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

VendorProductVersionsStatusSource
Progress Sharefile Storage Zones Controller < 5.12.6 Vulnerable NIST National Vulnerability Database

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector
Adjacent
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

ScoreVersionSeverityExpl.ImpactScored by
8.0 CVSS 3.1 High 2.1 5.9 security@progress.com via NIST National Vulnerability Database
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H (score shown at the top: security@progress.com)

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-502 · Deserialization of Untrusted Data

Other CVEs with this weakness →

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

  • Monitor serialized objects in requests and unexpected processes spawned by the runtime.
endpoint telemetry (EDR)application logs

Timeline

What happened to this CVE, newest first.

  • 2026
  • Record published
    Oct 15, 2026
  • CVSS changed · 8.0
    Oct 15, 2026 · NIST National Vulnerability Database
  • Source status changed · → Analyzed
    Oct 15, 2026 · NIST National Vulnerability Database
  • Record created in this database
    Oct 15, 2026 · NIST National Vulnerability Database
  • CVE published
    Aug 17, 2026 · security@progress.com

Source activity

Repeated readings are counted rather than listed.

  • 1× Official description updated · Oct 15, 2026 – Oct 15, 2026

References

1 on the record

Elsewhere on this site

Progress
every CVE for this vendor
Insecure deserialization
same class
CWE-502
other pages naming this weakness

Related CVEs (same products)

  • CVE-2026-93695 Arbitrary file write through remote file identifiers in Progress ShareFile Storage Zones Controller FileCopyService 3d
  • CVE-2026-93693 Unauthenticated queue manipulation through connector SSRF and response injection in Progress ShareFile Storage Zones Controller 3d
  • CVE-2026-93694 Untrusted request routing and forged acknowledgements permit copy-workflow manipulation in Progress ShareFile Storage Zones Controller 3d
  • CVE-2026-16137 Path Traversal in Progress Sharefile Storage Zones Controller Aug 17, 2026
  • CVE-2026-16139 Improper Input Validation in Progress Sharefile Storage Zones Controller Aug 17, 2026
  • CVE-2026-15724 Path traversal in Progress ShareFile Storage Zones Controller (SZC) Jul 21, 2026

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

  • No FIRST EPSS score.
  • No fixed version, patch or mitigation documented.
  • No CISA SSVC assessment.
  • No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
  • No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
  • No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-16138 is "Deserialization of Untrusted Data in Progress Sharefile Storage Zones Controller", rated High. It affects Sharefile Storage Zones Controller (Progress); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 8.0 describes technical severity. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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