CVE-2021-1290Network attack vector

Unauthenticated root code execution via HTTP validation

Published Feb 4, 2021 · Updated Nov 8, 2024

Remote code execution in Cisco RV160/RV260 router firmware before 1.0.01.02 lets remote attackers run root code via crafted HTTP requests. The web-based management interface fails to properly validate HTTP request data, allowing crafted requests to reach privileged processing paths. No authentication is required, and successful exploitation can fully compromise the appliance; Cisco reported no public malicious use.

CVSS severity9.8
Critical
EPSS probability4.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Remote code execution in Cisco RV160/RV260 router firmware before 1.0.01.02 lets remote attackers run root code via crafted HTTP requests. The web-based management interface fails to properly validate HTTP request data, allowing crafted requests to reach privileged processing paths. No authentication is required, and successful exploitation can fully compromise the appliance; Cisco reported no public malicious use.

The record

CVE
CVE-2021-1290
Published
Feb 4, 2021
Updated
Nov 8, 2024
Vendor
ClamAV
Product
Cisco Small Business RV Series Router Firmware
Classifications
CWE-472, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 4, 2021CVE publishedPublication date reported by the CVE source.
  2. Nov 8, 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 privilegesunauthenticated

What is affected?

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

Published CVSS scores

9.8CiscoCVSS:3.1/AV:N/AC:L/PR:N/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-472External Control of System or Configuration Setting
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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