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CVE-2021-25156Instant Vulnerability

A remote arbitrary directory create vulnerability was discovered in some Aruba Instant Access Point (IAP) products in version(s): Aruba Instant 6.4.x: 6.4.4.8-4.2.4.17 and below; Aruba Instant 6.5.x: 6.5.4.18 and below; Aruba Instant 8.3.x: 8.3.0.14 and below; Aruba Instant…

Published Mar 29, 2021 · Updated Nov 21, 2024

Key Facts

Routine patching
  • CVE-2021-25156 is a medium-severity vulnerability (CVSS 4.9 v3.1) affecting Instant (Arubanetworks), Scalance W1750d Firmware (Siemens), Aruba Instant Access Points.
  • It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
  • EPSS estimates a 40% probability of exploitation in the next 30 days.
  • Fixed versions are available, including Instant <=6.4.4.8-4.2.4.18, Scalance W1750d Firmware 8.7.1.3, Instant 6.4.4.8-4.2.4.18.
  • Brandefense priority: routine patching, as no exploitation is known and its severity is moderate or low.

Scores

CVSS v3.1

4.9

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N

EPSS (30-day exploit likelihood)

40%

Higher than 98.6% of all scored CVEs

Exploit maturity

Proof of concept

ATLAS score

36/100

Publication score, see How it works

Exploitation Verdict

KEV listed

Not listed

Federal due date

None

No federal due date

Ransomware use

Not reported

Attributed actors

None named

Exploit & Defence Guidance

Exploit maturity

Proof of concept

Public exploit code

2

Proof-of-concept links

In-the-wild evidence

0

Reports of active use

Description

A remote arbitrary directory create vulnerability was discovered in some Aruba Instant Access Point (IAP) products in version(s): Aruba Instant 6.4.x: 6.4.4.8-4.2.4.17 and below; Aruba Instant 6.5.x: 6.5.4.18 and below; Aruba Instant 8.3.x: 8.3.0.14 and below; Aruba Instant 8.5.x: 8.5.0.11 and below; Aruba Instant 8.6.x: 8.6.0.6 and below; Aruba Instant 8.7.x: 8.7.1.0 and below.

Aruba has released patches for Aruba Instant that address this security vulnerability.

Affected Products

3 affected entries in total
ProductAffected versionsFixed in
InstantArubanetworksSee advisory6.4.4.8-4.2.4.18
Scalance W1750d FirmwareSiemensSee advisory8.7.1.3
Aruba Instant Access Points>= Aruba Instant 6.4.x: 6.4.4.8-4.2.4.17 and belown/a

Patched Releases

Instant

<=6.4.4.8-4.2.4.18

Scalance W1750d Firmware

8.7.1.3

Timeline

  1. Publicly disclosed

    Mar 29, 2021

  2. Last updated

    Nov 21, 2024

FAQ

Common Questions.

Is CVE-2021-25156 On Your Attack Surface?

Brandefense matches it against the products discovered on your perimeter and opens a finding the day a CVE like this is listed.

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Figures as of Oct 19, 2026. Compiled by Brandefense technologies from public vulnerability catalogs; scoring as described in How it works.

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