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CVE-2026-90871medium5.3

Path Traversal Leading to File Deletion in Ad Hoc Transfer and Web Transfer in Progress WS_FTP Server

Impact

Progress Software WS_FTP Server versions prior to 2024.0.7 and 2025.0.4 on Windows have a path traversal vulnerability, allowing an unauthenticated attacker to affect files outside the intended directory. The weakness is due to improper limitation of a pathname to a restricted directory. This may allow file deletion.

Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.

What to do

By default the affected anonymous account can only delete files it previously created; ensure it is not granted broader write/delete permissions than required on Ad Hoc Transfer and Web Transfer related directories. Contact Progress Software Technical Support for guidance on available mitigations.

ProgressSoftware guidance

Affected packages

This source has no supported package-version data for matching. You can read the advisory here, but this record alone cannot power a dependency check.

Affected products

Vendor version evidence. Product records are separate from automatic dependency matching.

Progress Software · ProgressSoftware

WS_FTP Server

2 ranges
ProgressSoftware version evidence
Platforms: Windows

Compare with this publisher’s ranges. This does not inspect your installation.

affected

0 → before 2024.0.7

custom versions

0 → before 2025.0.4

custom versions

unaffected

unknown

Other versions: unaffected

Original source description

Improper limitation of a pathname to a restricted directory in Progress Software WS_FTP Server versions prior to 2024.0.7 and 2025.0.4 on Windows could allow an unauthenticated attacker to affect files outside the intended directory.

Inside the record

Evidence available

Package identity · not supplied
Version evidence
Remediation guidance
Weakness classification
Additional publishers

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-90871

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Underlying weaknesses

The source’s classification of what caused the vulnerability.

CWE-22 ↗

CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

ProgressSoftware

Related →
CWE-73 ↗

CWE-73: External Control of File Name or Path

ProgressSoftware

Related →
Contributing organizations · 2
ProgressSoftware

Assigning organization

2026-10-29
CISA-ADP

Additional data publisher

2026-10-30

What changed

Follow changes
  1. CVE · CVE-2026-90871

    Observed 2026-10-30T18:55:13.335Z · upstream updated 2026-10-30T17:15:33.651Z

    Prioritization updated

    before

    []

    after

    [
  {
    "source": "CISA-ADP",
    "type": "SSVC",
    "role": "CISA Coordinator",
    "timestamp": "2026-10-30T17:15:23.342163Z",
    "decisions": [
      {
        "name": "Exploitation",
        "value": "none"
      },
      {
        "name": "Automatable",
        "value": "yes"
      },
      {
        "name": "Technical Impact",
        "value": "partial"
      }
    ]
  }
]

Large field values are marked as truncated previews. Original source snapshots remain retained.

Showing up to 50 most recent observed changes.

References

1 sources
progress.lightning.force.com/lightning/r/Knowledge__kav/ka7Pb000001vl86IAA/view
vendor-advisoryProgressSoftware