CVE-2021-25155

A remote arbitrary file modification vulnerability was discovered in some Aruba Instant Access...

6.5 MediumPublic exploit

A remote arbitrary file modification 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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: High
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: High
Availability: High

Exploit likelihood

12.4%Up 12.0 points since Apr 14, 2021

What each source reports

NVD Score used 6.5

Record: CVE-2021-25155
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H
CVSS 2.0: 8.5 HighAV:N/AC:L/Au:S/C:N/I:C/A:C
Updated: 2026-11-02

CVE List No score

Record: CVE-2021-25155
Updated: 2026-11-02

EUVDEUVD-2021-12066 No score

Record: EUVD-2021-12066
Updated: 2026-11-03

GitHub AdvisoriesGHSA-4gp5-j36j-xx9p 6.5

A remote arbitrary file modification vulnerability was discovered in some Aruba Instant Access...

Record: GHSA-4gp5-j36j-xx9p
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H
Updated: 2026-11-02

Affected products

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
Exploit-DB	Aruba Instant 8.7.1.0 - Arbitrary File Modification	2021-07-16
Exploit-DB	Aruba Instant (IAP) - Remote Code Execution	2021-07-15

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, Exploit-DB, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-25155 is a medium vulnerability (CVSS 6.5) in Arubanetworks Instant, published March 30, 2021. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 12.4%, the 96th percentile. No source names a fixed version.