CVE-2024-20356Public exploitNetwork attack vector

Root privilege escalation via firmware-update command injection

Published Apr 24, 2024 · Updated Aug 1, 2024

Command injection in Cisco Integrated Management Controller allows remote authenticated users with Administrator privileges to gain root access. The expRemoteFwUpdate API passes its path parameter to ExpFwUpdateUtilityThread, whose allowlist accepts command-substitution characters before formatting a curl command for system_secure(). Administrator-level web-interface access is required; successful exploitation executes commands as root without reported availability impact.

CVSS severity8.7

High

EPSS probability32.70%

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-2024-20356
Published: Apr 24, 2024
Updated: Aug 1, 2024

Vendor: ClamAV
Product: Cisco Unified Computing System E-Series Software
Classifications: CWE-78, T1059.004

Attack vector: network
Privileges: admin

Timeline

How it unfolded

Apr 24, 2024CVE publishedPublication date reported by the CVE source.
Aug 1, 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.

Affected versionversion=-

What conditions does exploitation require?

Attack vectornetwork

Required privilegesadmin

What is affected?

ClamAV · Cisco Unified Computing System E-Series Softwareversion=-

ClamAV · Cisco Unified Computing Systemversion=-

ClamAV · Cisco Unified Computing System (Standalone)version=3.0(1c); version=3.0(1d); version=3.0(3a); version=3.0(3b); version=3.0(3e); version=3.0(4a); version=3.0(4d); version=3.0(4e); version=3.0(4i); version=3.0(4j); version=3.0(4k); version=3.0(4l); version=3.0(4m); version=3.0(4n); version=3.0(4o); version=3.0(4p); version=3.0(4q); version=3.0(4r); version=3.0(4s); version=3.1(1d); version=3.1(2b); version=3.1(2c); version=3.1(2d); version=3.1(2e); version=3.1(2g); version=3.1(2i); version=3.1(3a); version=3.1(3b); version=3.1(3c); version=3.1(3d); version=3.1(3g); version=3.1(3h); version=3.1(3i); version=3.1(3j); version=3.1(3k); version=4.0(1.240); version=4.0(1a); version=4.0(1b); version=4.0(1c); version=4.0(1d); version=4.0(1e); version=4.0(1g); version=4.0(1h); version=4.0(2c); version=4.0(2d); version=4.0(2f); version=4.0(2g); version=4.0(2h); version=4.0(2i); version=4.0(2k); version=4.0(2l); version=4.0(2m); version=4.0(2n); version=4.0(2o); version=4.0(2p); version=4.0(2q); version=4.0(2r); version=4.0(4b); version=4.0(4c); version=4.0(4d); version=4.0(4e); version=4.0(4f); version=4.0(4h); version=4.0(4i); version=4.0(4j); version=4.0(4k); version=4.0(4l); version=4.0(4m); version=4.0(4n); version=4.1(1c); version=4.1(1d); version=4.1(1f); version=4.1(1g); version=4.1(1h); version=4.1(2a); version=4.1(2b); version=4.1(2d); version=4.1(2e); version=4.1(2f); version=4.1(2g); version=4.1(2h); version=4.1(2j); version=4.1(2k); version=4.1(2l); version=4.1(2m); version=4.1(3b); version=4.1(3c); version=4.1(3d); version=4.1(3f); version=4.1(3g); version=4.1(3h); version=4.1(3i); version=4.1(3l); version=4.1(3m); version=4.2(1a); version=4.2(1b); version=4.2(1c); version=4.2(1e); version=4.2(1f); version=4.2(1g); version=4.2(1i); version=4.2(1j); version=4.2(2a); version=4.2(2f); version=4.2(2g); version=4.2(3b); version=4.2(3d); version=4.2(3e); version=4.2(3g); version=4.2(3h); version=4.2(3i); version=4.2(3j); version=4.3(1.230097); version=4.3(1.230124); version=4.3(1.230138); version=4.3(2.230207); version=4.3(2.230270); version=4.3(2.240002); version=4.3(3.240022)

ClamAV · Cisco Unified Computing System E-Series Software (UCSE)version=2.0.0; version=2.1.0; version=2.2.1; version=2.2.2; version=2.3.1; version=2.3.2; version=2.3.3; version=2.3.5; version=2.4.0; version=2.4.1; version=2.4.2; version=3.0.1; version=3.0.2; version=3.1.0; version=3.1.1; version=3.1.2; version=3.1.3; version=3.1.4; version=3.1.5; version=3.2.1; version=3.2.10; version=3.2.11.1; version=3.2.11.3; version=3.2.11.5; version=3.2.12.2; version=3.2.13.6; version=3.2.14; version=3.2.15; version=3.2.2; version=3.2.3; version=3.2.4; version=3.2.6; version=3.2.7; version=3.2.8; version=4.11.1; version=4.12.1

Published CVSS scores

8.7CiscoCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N/E:X/RL:X/RC:X

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

Privilegesadmin

Known exploitationUnconfirmed

Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

T1059.004Unix Shell

Public exploit references

nettitude CVE-2024-20356 toolkitproof of concept · demonstrated

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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