CVE-2021-25155

Exp

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.

Published: 2021-03-30 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-25155 is rated High Exploit Risk (79.2/100): CVSS Medium severity, with high exploitation likelihood (EPSS 13.31%, 96th percentile). 2 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +4.63% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2021-25155

EDB-ID Source Kind Published Link
50133 exploit_db edb 2021-07-16 Exploit-DB ↗
50136 exploit_db edb 2021-07-15 Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2021-25155

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 8.68% 13.31% +4.63%
2 2026-04-12 9.93% 8.68% -1.25%
3 2025-11-21 — 9.93% —

Full EPSS history (23 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-25155

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.5 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:H)
They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.2 5.2 [email protected]
8.5 2.0 HIGH
AV:N/AC:L/Au:S/C:N/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:S)
A single authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 8.0 9.2 [email protected]

Weakness enumeration for CVE-2021-25155

Affected software / configurations for CVE-2021-25155

Vendor Product Version Raw CPE
arubanetworks instant >= 6.4.0.0, <= 6.4.4.8-4.2.4.18 cpe:2.3:o:arubanetworks:instant:*:*:*:*:*:*:*:*
arubanetworks instant >= 6.5.0.0, < 6.5.4.19 cpe:2.3:o:arubanetworks:instant:*:*:*:*:*:*:*:*
arubanetworks instant >= 8.3.0.0, < 8.3.0.15 cpe:2.3:o:arubanetworks:instant:*:*:*:*:*:*:*:*
arubanetworks instant >= 8.5.0.0, < 8.5.0.12 cpe:2.3:o:arubanetworks:instant:*:*:*:*:*:*:*:*
arubanetworks instant >= 8.6.0.0, < 8.6.0.7 cpe:2.3:o:arubanetworks:instant:*:*:*:*:*:*:*:*
arubanetworks instant >= 8.7.0.0, < 8.7.1.1 cpe:2.3:o:arubanetworks:instant:*:*:*:*:*:*:*:*
siemens scalance_w1750d_firmware >= 8.7.0, < 8.7.1.3 cpe:2.3:o:siemens:scalance_w1750d_firmware:*:*:*:*:*:*:*:*

References for CVE-2021-25155

cvelogic Threat Intelligence