How severe is CVE-2021-25158?

CVE-2021-25158 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-25158 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 31% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-25158?

CVE-2021-25158 primarily affects Arubanetworks Instant. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-25158?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-25158 published?

CVE-2021-25158 was published on 2021-03-30 and last updated on 2026-06-17.

CVE-2021-25158

CVE-2021-25158 is a medium-severity vulnerability in Arubanetworks Instant with a CVSS 3.x base score of 5.9. Its EPSS exploit-prediction score of 31% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-362.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
CVSS v2: 4.3
EPSS exploit prediction: 31% (98th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-362
Affected product: Arubanetworks Instant
Published: 2021-03-30
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2021-25158?: 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.
How severe is CVE-2021-25158?: CVE-2021-25158 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-25158 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 31% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-25158?: CVE-2021-25158 primarily affects Arubanetworks Instant. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-25158?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-25158 published?: CVE-2021-25158 was published on 2021-03-30 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:o:arubanetworks:instant:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:scalance_w1750d_firmware:*:*:*:*:*:*:*:*

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