CVE-2021-1297Network attack vector

Arbitrary file overwrite via unchecked upload paths

Published Feb 4, 2021 · Updated Nov 8, 2024

Absolute path traversal in Cisco RV160 and RV260 Series firmware before 1.0.01.02 allows remote attackers to overwrite restricted files. The DNIAPI web service on TCP port 443 uses the filename parameter in file operations without validating the user-supplied path. No authentication or user interaction is required, and attacker-controlled files are created with root context on the appliance.

CVSS severity7.5
High
EPSS probability3.69%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Absolute path traversal in Cisco RV160 and RV260 Series firmware before 1.0.01.02 allows remote attackers to overwrite restricted files. The DNIAPI web service on TCP port 443 uses the filename parameter in file operations without validating the user-supplied path. No authentication or user interaction is required, and attacker-controlled files are created with root context on the appliance.

The record

CVE
CVE-2021-1297
Published
Feb 4, 2021
Updated
Nov 8, 2024
Vendor
ClamAV
Product
Cisco Small Business RV Series Router Firmware
Classifications
CWE-22, CWE-36, 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

8.8Trend Micro Zero Day InitiativeCVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5Cisco Systems, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:X/RL:X/RC:X
9.4NIST NVDAV:N/AC:L/Au:N/C:N/I:C/A:C

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-36Absolute Path Traversal
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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