CVE-2022-20876Network attack vector

Root command execution or restart via HTTP fields

Published Jul 21, 2022 · Updated Nov 6, 2024

Command injection and buffer overflow in Cisco RV110W/RV130/RV130W/RV215W routers allow remote authenticated users to run code or restart devices. The web interface insufficiently validates user fields in incoming HTTP packets before OS command handling or copying them into a buffer without checking size. Valid Administrator credentials and LAN access, or enabled WAN remote management, are required; exploitation yields root-level commands or an unexpected device restart.

CVSS severity4.7
Medium
EPSS probability1.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection and buffer overflow in Cisco RV110W/RV130/RV130W/RV215W routers allow remote authenticated users to run code or restart devices. The web interface insufficiently validates user fields in incoming HTTP packets before OS command handling or copying them into a buffer without checking size. Valid Administrator credentials and LAN access, or enabled WAN remote management, are required; exploitation yields root-level commands or an unexpected device restart.

The record

CVE
CVE-2022-20876
Published
Jul 21, 2022
Updated
Nov 6, 2024
Vendor
ClamAV
Product
Cisco Small Business RV Series Router Firmware
Classifications
CWE-78, CWE-120, T1059, T1499
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jul 21, 2022CVE publishedPublication date reported by the CVE source.
  2. Nov 6, 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 NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
4.7Cisco Systems, Inc.CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1059Command and Scripting Interpreter
T1499Endpoint Denial of Service

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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