CVE-2021-28172Network attack vector

Arbitrary file read via traversable download parameter

Published Apr 6, 2021 · Updated Sep 17, 2024

Path traversal in Vangene deltaFlow E-platform 4 allows remote attackers to read arbitrary server files through its download function. The function accepts a path-bearing request parameter without restricting resolution to the intended download directory, so traversal sequences reach files elsewhere on the workflow server. No authentication or user interaction is required, and exposed data includes credentials, but no write or service-interruption impact is reported.

CVSS severity7.5
High
EPSS probability1.80%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in Vangene deltaFlow E-platform 4 allows remote attackers to read arbitrary server files through its download function. The function accepts a path-bearing request parameter without restricting resolution to the intended download directory, so traversal sequences reach files elsewhere on the workflow server. No authentication or user interaction is required, and exposed data includes credentials, but no write or service-interruption impact is reported.

The record

CVE
CVE-2021-28172
Published
Apr 6, 2021
Updated
Sep 17, 2024
Vendor
Vangene
Product
deltaFlow E-platform
Classifications
CWE-22, T1212
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 6, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Vangene · deltaFlow E-platformversion=4

Published CVSS scores

7.5TWCERT/CCCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
5.0NVDAV:N/AC:L/Au:N/C:P/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1212Exploitation for Credential Access

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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