CVE-2022-20702

Root code execution via insecure temporary file

Published Feb 10, 2022 · Updated Nov 6, 2024

Local privilege escalation in Cisco Small Business RV Series Router Firmware allows local users to execute arbitrary code as root. The utility-ping-request script creates a temporary file with insecure permissions, allowing low-privileged code to alter it before privileged use. Exploitation requires prior low-privileged code execution on the router and grants root-level command execution.

CVSS severity6.0
Medium
EPSS probability4.60%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Local privilege escalation in Cisco Small Business RV Series Router Firmware allows local users to execute arbitrary code as root. The utility-ping-request script creates a temporary file with insecure permissions, allowing low-privileged code to alter it before privileged use. Exploitation requires prior low-privileged code execution on the router and grants root-level command execution.

The record

CVE
CVE-2022-20702
Published
Feb 10, 2022
Updated
Nov 6, 2024
Vendor
ClamAV
Product
Cisco Small Business RV Series Router Firmware
Classifications
CWE-121, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 10, 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 vectorlocal
Required privilegesauthenticated

What is affected?

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

Published CVSS scores

6.0Cisco Security AdvisoryCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
7.2NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
10.0Cisco Systems, Inc. CNACVSS: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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
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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