CVE-2025-20282Network attack vector

Unauthenticated root code execution via unrestricted file upload

Published Jun 25, 2025 · Updated Feb 26, 2026

Arbitrary file upload in an internal API of Cisco Identity Services Engine 3.4 allows remote attackers to execute code as root. The API accepts a crafted upload without file-validation checks, permitting attacker-controlled files to be placed in privileged directories and executed. No credentials or special configuration are required, and successful exploitation grants complete root control of the appliance.

CVSS severity10.0
Critical
EPSS probability27.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Arbitrary file upload in an internal API of Cisco Identity Services Engine 3.4 allows remote attackers to execute code as root. The API accepts a crafted upload without file-validation checks, permitting attacker-controlled files to be placed in privileged directories and executed. No credentials or special configuration are required, and successful exploitation grants complete root control of the appliance.

The record

CVE
CVE-2025-20282
Published
Jun 25, 2025
Updated
Feb 26, 2026
Vendor
ClamAV
Product
Cisco Identity Services Engine
Classifications
CWE-269, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 25, 2025CVE publishedPublication date reported by the CVE source.
  2. Feb 26, 2026Record 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=3.4.0
  2. Affected versionversion=3.4 Patch 1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ClamAV · Cisco Identity Services Engineversion=3.4.0; version=3.4 Patch 1

Published CVSS scores

10.0CiscoCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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-269Improper Privilege Management
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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