CVE-2021-25149Network attack vector

Unauthenticated privileged code execution via PAPI packets

Published Mar 29, 2021 · Updated Aug 3, 2024

Buffer overflow in Aruba Instant's PAPI service allows remote attackers to execute privileged code through crafted UDP packets. The UDP port 8211 PAPI handler mishandles specially crafted packets, but HPE has not disclosed the affected routine or unchecked operation. No authentication or user interaction is required; affected releases end at 6.4.4.8-4.2.4.17, 6.5.4.16, 8.3.0.12, 8.5.0.6, and 8.6.0.2.

CVSS severity9.8

Critical

EPSS probability1.65%

Next 30 days · Sep 16, 2026

Known exploitationUnconfirmed

Based on sourced intelligence

Hinoki checkNot available

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Summary

What happened

The record

CVE: CVE-2021-25149
Published: Mar 29, 2021
Updated: Aug 3, 2024

Vendor: Hewlett Packard Enterprise (HPE)
Product: Aruba Instant
Classifications: CWE-120, T1190

Attack vector: network
Privileges: unauthenticated

Timeline

How it unfolded

Mar 29, 2021CVE publishedPublication date reported by the CVE source.
Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

Affected versionversion=Aruba Instant 6.4.x: 6.4.4.8-4.2.4.17 and below
Affected versionversion=Aruba Instant 6.5.x: 6.5.4.16 and below
Affected versionversion=Aruba Instant 8.3.x: 8.3.0.12 and below
Affected versionversion=Aruba Instant 8.5.x: 8.5.0.6 and below
Affected versionversion=Aruba Instant 8.6.x: 8.6.0.2 and below

What conditions does exploitation require?

Attack vectornetwork

Required privilegesunauthenticated

What is affected?

Hewlett Packard Enterprise (HPE) · Aruba Instantversion=Aruba Instant 6.4.x: 6.4.4.8-4.2.4.17 and below; version=Aruba Instant 6.5.x: 6.5.4.16 and below; version=Aruba Instant 8.3.x: 8.3.0.12 and below; version=Aruba Instant 8.5.x: 8.5.0.6 and below; version=Aruba Instant 8.6.x: 8.6.0.2 and below

Published CVSS scores

7.2Hewlett Packard Enterprise (HPE)AV:L/AC:L/Au:N/C:C/I:C/A:C

9.8Hewlett Packard Enterprise (HPE)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026

Latest reporting daySep 16, 2026

Latest daily unique IPsUnavailable

Prior 30-day averageUnavailable

SourceShadowserver honeypots (KEV)

Vectornetwork

Privilegesunauthenticated

Known exploitationUnconfirmed

Public exploitUnconfirmed

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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