CVE-2017-16819: A stored cross-site scripting vulnerability in the Icon Time Systems RTC-1000 v2.5.7458 and earlier time clock

Q: How do I fix CVE-2017-16819?

rtc-1000 firmware: upgrade to newer than 2.5.7458. Exact commands for each OS are on this page.

Q: Is CVE-2017-16819 being exploited?

CVE-2017-16819 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-2017-16819 affect?

CVE-2017-16819 affects rtc-1000 firmware. Severity is medium (CVSS 5.4). A stored cross-site scripting vulnerability in the Icon Time Systems RTC-1000 v2.5.7458 and earlier time clock allows remote attackers to inject arbitrary JavaScript in the nameFirst (aka First Name) field for the employee details page (/em

Q: How urgent is CVE-2017-16819?

Priority 44/100. Public exploit reference

This month

MEDIUM 5.4UPGRADE

CVE-2017-16819 is a medium-severity flaw (CVSS 5.4) affecting rtc-1000 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A stored cross-site scripting vulnerability in the Icon Time Systems RTC-1000 v2.5.7458 and earlier time clock allows remote attackers to inject arbitrary JavaScript in the nameFirst (aka First Name) field for the employee details page (/employee.html) that is then reflected in multiple pages where that field data is utilized, resulting in session hijacking and possible elevation of privileges.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	1.9% (top 20%)
CISA exploited list	No
Weakness	CWE-79
Published	2017-11-17
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: icontime

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

Am I affected?

Timeline

2017-11-17 17:29 UTCPublished CVE record published
2026-06-17 01:09 UTCUpdated Record last modified

icontime rtc-1000 firmware UPGRADE

Affected: <= 2.5.7458

Fixed in: newer than 2.5.7458

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.

Exploit-DB: Icon Time Systems RTC-1000 Firmware 2.5.7458 - Cross-Site Scripting

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-2017-16819?

rtc-1000 firmware: upgrade to newer than 2.5.7458. Exact commands for each OS are on this page.

Is CVE-2017-16819 being exploited?

CVE-2017-16819 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-2017-16819 affect?

CVE-2017-16819 affects rtc-1000 firmware. Severity is medium (CVSS 5.4). A stored cross-site scripting vulnerability in the Icon Time Systems RTC-1000 v2.5.7458 and earlier time clock allows remote attackers to inject arbitrary JavaScript in the nameFirst (aka First Name) field for the employee details page (/em

How urgent is CVE-2017-16819?

Priority 44/100. Public exploit reference

References

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