CVE-2021-26682Network attack vector

Script execution via guest portal reflection

Published Feb 23, 2021 · Updated Aug 3, 2024

Reflected XSS in HPE Aruba Networking ClearPass Policy Manager allows remote attackers to run scripts in guest portal users' browsers. The guest portal reflects attacker-controlled request data into a response, but HPE has not disclosed the affected parameter or rendering path. Exploitation requires a portal user to open an attacker-crafted request; successful execution occurs in the guest portal's browser context.

CVSS severity6.1
Medium
EPSS probability0.83%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in HPE Aruba Networking ClearPass Policy Manager allows remote attackers to run scripts in guest portal users' browsers. The guest portal reflects attacker-controlled request data into a response, but HPE has not disclosed the affected parameter or rendering path. Exploitation requires a portal user to open an attacker-crafted request; successful execution occurs in the guest portal's browser context.

The record

CVE
CVE-2021-26682
Published
Feb 23, 2021
Updated
Aug 3, 2024
Vendor
Hewlett Packard Enterprise (HPE)
Product
HPE Aruba Networking ClearPass Policy Manager
Classifications
CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 23, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=Prior to 6.9.5, 6.8.8-HF1, 6.7.14-HF1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Hewlett Packard Enterprise (HPE) · HPE Aruba Networking ClearPass Policy Managerversion=Prior to 6.9.5, 6.8.8-HF1, 6.7.14-HF1

Published CVSS scores

4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:P/A:N
6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

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-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

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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