CVE-2018-7277: An issue was discovered on RLE Wi-MGR/FDS-Wi 6.2 devices

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MEDIUM 6.1MITIGATEMITIGATE

CVE-2018-7277 is a medium-severity flaw (CVSS 6.1) affecting wi-mgr firmware, fds-wi firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered on RLE Wi-MGR/FDS-Wi 6.2 devices. Persistent XSS exists in the web server. Remote attackers can inject malicious JavaScript code using the device's BACnet implementation. This is similar to a Cross Protocol Injection with SNMP.

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.8% (top 45%)
CISA exploited list	No
Weakness	CWE-79
Published	2018-02-21
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: rletech

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

Am I affected?

Timeline

2018-02-21 01:29 UTCPublished CVE record published
2026-06-17 02:02 UTCUpdated Record last modified

rletech wi-mgr firmware MITIGATE

Affected: 6.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.2

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.

rletech fds-wi firmware MITIGATE

Affected: 6.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.2

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.

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-2018-7277?

wi-mgr firmware: mitigate or apply the listed mitigation; fds-wi firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2018-7277 being exploited?

CVE-2018-7277 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-2018-7277 affect?

CVE-2018-7277 affects wi-mgr firmware, fds-wi firmware. Severity is medium (CVSS 6.1). An issue was discovered on RLE Wi-MGR/FDS-Wi 6.2 devices. Persistent XSS exists in the web server. Remote attackers can inject malicious JavaScript code using the device's BACnet implementation. This is similar to a Cross Protocol Injection

How urgent is CVE-2018-7277?

Priority 40/100. Public exploit reference

References

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