CVE-2017-5261: In versions 4.3.2-R4 and prior of Cambium Networks cnPilot firmware, the 'ping' and 'traceroute' functions of

Q: How do I fix CVE-2017-5261?

cnpilot r190v firmware: upgrade to newer than 4.3.2-r4; cnpilot e410 firmware: upgrade to newer than 4.3.2-r4; cnpilot r190n firmware: upgrade to newer than 4.3.2-r4. Exact commands for each OS are on this page.

Q: Is CVE-2017-5261 being exploited?

CVE-2017-5261 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2017-5261 affect?

CVE-2017-5261 affects cnpilot r190v firmware, cnpilot e410 firmware, cnpilot r190n firmware. Severity is high (CVSS 8.8). In versions 4.3.2-R4 and prior of Cambium Networks cnPilot firmware, the 'ping' and 'traceroute' functions of the web administrative console expose a file path traversal vulnerability, accessible to all authenticated users.

Q: How urgent is CVE-2017-5261?

Priority 60/100. High severity; EPSS top 5%: very likely to be exploited; Public exploit reference

This week

HIGH 8.8UPGRADEUPGRADEUPGRADE

CVE-2017-5261 is a high-severity flaw (CVSS 8.8) affecting cnpilot r190v firmware, cnpilot e410 firmware, cnpilot r190n firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In versions 4.3.2-R4 and prior of Cambium Networks cnPilot firmware, the 'ping' and 'traceroute' functions of the web administrative console expose a file path traversal vulnerability, accessible to all authenticated users.

Why this priority

High severity
EPSS top 5%: very likely to be exploited
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	8.9% (top 5%)
CISA exploited list	No
Weakness	CWE-472, CWE-22
Published	2017-12-20
Last modified	2026-06-17

Publisher (CNA): Rapid7, Inc. · Vendor: cambiumnetworks

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2017-12-20 22:29 UTCPublished CVE record published
2026-06-17 01:20 UTCUpdated Record last modified

cambiumnetworks cnpilot r190v firmware UPGRADE

Affected: <= 4.3.2-r4

Fixed in: newer than 4.3.2-r4

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

cambiumnetworks cnpilot e410 firmware UPGRADE

Affected: <= 4.3.2-r4

Fixed in: newer than 4.3.2-r4

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

cambiumnetworks cnpilot r190n firmware UPGRADE

Affected: <= 4.3.2-r4

Fixed in: newer than 4.3.2-r4

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

cambiumnetworks cnpilot e400 firmware UPGRADE

Affected: <= 4.3.2-r4

Fixed in: newer than 4.3.2-r4

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

cambiumnetworks cnpilot e600 firmware UPGRADE

Affected: <= 4.3.2-r4

Fixed in: newer than 4.3.2-r4

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Metasploit: Cambium cnPilot r200/r201 File Path Traversal

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2017-5261?

cnpilot r190v firmware: upgrade to newer than 4.3.2-r4; cnpilot e410 firmware: upgrade to newer than 4.3.2-r4; cnpilot r190n firmware: upgrade to newer than 4.3.2-r4. Exact commands for each OS are on this page.

Is CVE-2017-5261 being exploited?

CVE-2017-5261 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2017-5261 affect?

CVE-2017-5261 affects cnpilot r190v firmware, cnpilot e410 firmware, cnpilot r190n firmware. Severity is high (CVSS 8.8). In versions 4.3.2-R4 and prior of Cambium Networks cnPilot firmware, the 'ping' and 'traceroute' functions of the web administrative console expose a file path traversal vulnerability, accessible to all authenticated users.

How urgent is CVE-2017-5261?

Priority 60/100. High severity; EPSS top 5%: very likely to be exploited; Public exploit reference

Related CVEs

CVE-2017-5263 HIGH 8.0 UPGRADE UPGRADE Versions 4.3.2-R4 and prior of Cambium Networks cnPilot firmware lack CSRF controls that can mitigate the effe
CVE-2017-5262 HIGH 8.0 UPGRADE UPGRADE In versions 4.3.2-R4 and prior of Cambium Networks cnPilot firmware, the SNMP read-only (RO) community string
CVE-2017-5260 HIGH 8.8 UPGRADE UPGRADE In versions 4.3.2-R4 and prior of Cambium Networks cnPilot firmware, although the option to access the configu
CVE-2017-5259 HIGH 8.8 UPGRADE UPGRADE In versions 4.3.2-R4 and prior of Cambium Networks cnPilot firmware, an undocumented, root-privilege administr

References

← Back to latest CVEs