CVE-2021-25158

Exp

A remote arbitrary file read vulnerability was discovered in some Aruba Instant Access Point (IAP) products in version(s): 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: 8.6.0.7 and below; Aruba Instant 8.7.x: 8.7.1.1 and below. Aruba has released patches for Aruba Instant that address this security vulnerability.

Published: 2021-03-29 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-25158 is rated High Exploit Risk (77.9/100): CVSS Medium severity, with high exploitation likelihood (EPSS 30.58%, 98th percentile). 2 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +25.68% 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-2021-25158

EDB-ID Source Kind Published Link
50136 exploit_db edb 2021-07-15 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2021-25158

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 4.90% 30.58% +25.68%
2 2026-04-12 6.72% 4.90% -1.82%
3 2025-11-21 — 6.72% —

Full EPSS history (27 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-25158

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.9 3.1 MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N 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:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
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:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 2.2 3.6 [email protected]
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2021-25158

Affected software / configurations for CVE-2021-25158

Vendor Product Version Raw CPE
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, < 8.6.0.8 cpe:2.3:o:arubanetworks:instant:*:*:*:*:*:*:*:*
arubanetworks instant >= 8.7.0.0, < 8.7.1.2 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-2021-25158

cvelogic Threat Intelligence