CVE-2020-3292Network attack vector

Root code execution via oversized management requests

Published Jun 18, 2020 · Updated Nov 15, 2024

Stack overflow in Cisco Small Business RV Series router firmware allows remote authenticated users to execute code with root privileges. Web-management scripts fail to bound oversized values in crafted requests, causing a stack overflow on firmware 4.2.3.10 and earlier or 1.5.1.05 and earlier, depending on the router family. Administrative access to the web interface is required; exploitation can crash the device or run arbitrary code as root, and internet reachability additionally requires the disabled-by-default remote management feature.

CVSS severity7.2
High
EPSS probability3.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack overflow in Cisco Small Business RV Series router firmware allows remote authenticated users to execute code with root privileges. Web-management scripts fail to bound oversized values in crafted requests, causing a stack overflow on firmware 4.2.3.10 and earlier or 1.5.1.05 and earlier, depending on the router family. Administrative access to the web interface is required; exploitation can crash the device or run arbitrary code as root, and internet reachability additionally requires the disabled-by-default remote management feature.

The record

CVE
CVE-2020-3292
Published
Jun 18, 2020
Updated
Nov 15, 2024
Vendor
ClamAV
Product
Cisco Small Business RV Series Router Firmware
Classifications
CWE-119, CWE-787, T1068
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jun 18, 2020CVE publishedPublication date reported by the CVE source.
  2. Nov 15, 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=n/a

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

ClamAV · Cisco Small Business RV Series Router Firmwareversion=n/a

Published CVSS scores

7.2NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
9.0NIST National Vulnerability DatabaseAV:N/AC:L/Au:S/C:C/I:C/A:C
7.2Cisco Systems, Inc.CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-787Out-of-bounds Write
T1068Exploitation for Privilege Escalation

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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