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CVE-2025-67038

From Exploited flaws, HARD’s guide to the flaws being used in attacks · Checked
This article is about a flaw in Lantronix EDS5000. For every flaw being used in attacks, see Exploited flaws.

CVE-2025-67038 is a security flaw in Lantronix EDS5000. Attackers can run their own code on Lantronix EDS5000. The US Cybersecurity and Infrastructure Security Agency (CISA) added it to its catalog of flaws known to be used in attacks on 23 Jun 2026.[1]

Lantronix EDS5000 is business software or equipment. Most families won’t have it, but attackers break into it to get inside companies, and from there to what those companies hold about their customers, patients and staff. Fixed in version 2.6.0.4R6 and 3.21.0.0R1.

Description

CISA calls it a code injection in Lantronix EDS5000. In its words: “Lantronix EDS5000 contains a code injection vulnerability that could allow attackers to inject arbitrary OS commands into the username parameter. Injected commands are executed with root privileges.”[1]

The CVE record adds: “An issue was discovered in Lantronix EDS5000 2.1.0.0R3. The HTTP RPC module executes a shell command to write logs when user's authentication fails. The username is directly concatenated with the command without any sanitization. This allow attackers to inject arbitrary OS commands into the username parameter. Injected commands are executed with root privileges.”[2]

The underlying weakness is OS command injection (CWE-78), code injection (CWE-94), in MITRE’s list of common software weaknesses.

It scores 9.8 out of 10 on the Common Vulnerability Scoring System, which rates it critical, scored by the organisation that published the CVE using CVSS 3.1.[2]

Affected versions

NVD’s record lists these fixed versions: in each line, everything before the version shown is affected.[2]

ProductFixed in
G520 series2.6.0.4R6
X300 series2.6.0.4R6
E210 series3.21.0.0R1
E220 series3.21.0.0R1

Most families won’t have Lantronix EDS5000; it’s for whoever looks after IT at work.

Exploitation

CISA added it to its catalog of known exploited vulnerabilities on 23 Jun 2026, 104 days after it was made public. CISA lists a flaw only when it has reliable evidence of it being exploited, and gave US federal agencies until 26 Jun 2026 to fix it.[1]

FIRST’s Exploit Prediction Scoring System, which estimates how likely a flaw is to be used in attacks in the next 30 days from what it sees across the internet, puts it at 20%. That’s in the top 3% of the flaws it scores.[4]

CISA assesses it as automatable: attackers can run it against many targets at once.

CISA doesn’t say who was attacked, or how.

Fix

Lantronix has published a fix or advice.[3] CISA’s required action: “Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes).”[1]

  1. Check whether you use it.Lantronix EDS5000 is business software or equipment, so most families won’t have it. If you run a business, or work from home on company equipment, ask whoever looks after your IT.
  2. Send this page to your IT person.Ask them to confirm it’s fixed (fixed in version 2.6.0.4R6 and 3.21.0.0R1), or not in use. CISA gave US government agencies until 26 Jun 2026 to fix it.
  3. If it can’t be fixed, take it offline.CISA’s advice when there’s no fix is to stop using the product, or take it off the internet, until there is one.

You can’t fix someone else’s server, but you can watch for what follows a break-in like this: a breach notice, a password reset you didn’t ask for, or a scam message that knows things it shouldn’t. HARD watches for those for you and your family.

Timeline

DateEvent
The flaw is made public in the National Vulnerability Database, with a severity score of 9.8.[2]
CISA adds it to its catalog of flaws known to be used in attacks.[1]
CISA’s deadline for US government agencies to fix it.[1]
FIRST puts the odds of it being used in attacks in the next 30 days at 20%.[4]

See also

Other OS command injection flaws

  • CVE-2026-110447, Collabora Online – Built-in CODE Server: online – built-in CODE server OS command injection ·
  • CVE-2026-106931, EG Secure Solutions SiteGuard Server Edition: OS command injection ·
  • CVE-2026-83549, SonicWall SMA1000 Appliances: OS command injection ·
  • CVE-2026-49869, Kestra OSS: OSS OS command injection ·
  • CVE-2026-73570, Synacor Zimbra Collaboration Suite (ZCS): OS command injection ·

Added the same day

  • CVE-2026-34910, Ubiquiti UniFi OS: improper input validation ·
  • CVE-2026-34909, Ubiquiti UniFi OS: path traversal ·
  • CVE-2026-34908, Ubiquiti UniFi OS: improper access control ·

References

  1. ^ Cybersecurity and Infrastructure Security Agency. “Lantronix EDS5000 Code Injection Vulnerability”. Known Exploited Vulnerabilities Catalog, added 23 Jun 2026.
  2. ^ National Institute of Standards and Technology. “CVE-2025-67038 Detail”. National Vulnerability Database, published 11 Mar 2026.
  3. ^ Lantronix. Advisories and fixes: ltrxdev.atlassian.net, lantronix.com.
  4. ^ FIRST. “Exploit Prediction Scoring System”. EPSS 0.203, percentile 97.5, 31 Oct 2026.
  5. CVE Program. “CVE-2025-67038”. The official CVE record.

This article is built from CISA’s catalog (version 2026.10.30), NVD’s record and FIRST’s scores, kept in HARD’s database and checked every morning. The plain English is HARD’s.