CVE-2020-3289Network attack vector

Authenticated stack overflow code execution

Published Jun 18, 2020 · Updated Nov 15, 2024

Stack overflow in Cisco Small Business RV Series Router Firmware 1.5.1.05 and earlier allows remote authenticated administrators to execute arbitrary code. Web management scripts accept oversized user-supplied values without boundary checks, overflowing stack buffers. The attacker must have administrative credentials for the management interface; successful exploitation can crash the router or run code with root privileges.

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 1.5.1.05 and earlier allows remote authenticated administrators to execute arbitrary code. Web management scripts accept oversized user-supplied values without boundary checks, overflowing stack buffers. The attacker must have administrative credentials for the management interface; successful exploitation can crash the router or run code with root privileges.

The record

CVE
CVE-2020-3289
Published
Jun 18, 2020
Updated
Nov 15, 2024
Vendor
ClamAV
Product
Cisco Small Business RV Series Router Firmware
Classifications
CWE-119, T1190
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?

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  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

7.2CiscoCVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/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.

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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
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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