CVE-2024-39345: AdTran 834-5 HDC17600021F1 (SmartOS 11.1.1.1) devices enable the SSH service by default and have a hidden, und

Q: How do I fix CVE-2024-39345?

sdg smartos: upgrade to 12.1.3.1. Exact commands for each OS are on this page.

Q: Is CVE-2024-39345 being exploited?

CVE-2024-39345 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-2024-39345 affect?

CVE-2024-39345 affects sdg smartos. Severity is high (CVSS 7.2). AdTran 834-5 HDC17600021F1 (SmartOS 11.1.1.1) devices enable the SSH service by default and have a hidden, undocumented, hard-coded support account whose password is based on the devices MAC address. All of the devices internet interfaces s

Routine

HIGH 7.2UPGRADE

CVE-2024-39345 is a high-severity flaw (CVSS 7.2) affecting sdg smartos. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

AdTran 834-5 HDC17600021F1 (SmartOS 11.1.1.1) devices enable the SSH service by default and have a hidden, undocumented, hard-coded support account whose password is based on the devices MAC address. All of the devices internet interfaces share a similar MAC address that only varies in their final octet. This allows network-adjacent attackers to derive the support user's SSH password by decrementing the final octet of the connected gateway addres

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.2 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	0.5% (top 55%)
CISA exploited list	No
Weakness	CWE-78, CWE-259
Published	2024-07-24
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: adtran

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

Am I affected?

Timeline

2024-07-24 15:15 UTCPublished CVE record published
2026-06-17 07:41 UTCUpdated Record last modified

adtran sdg smartos UPGRADE

Affected: < 12.1.3.1

Fixed in: 12.1.3.1

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.

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-2024-39345?

sdg smartos: upgrade to 12.1.3.1. Exact commands for each OS are on this page.

Is CVE-2024-39345 being exploited?

CVE-2024-39345 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-2024-39345 affect?

CVE-2024-39345 affects sdg smartos. Severity is high (CVSS 7.2). AdTran 834-5 HDC17600021F1 (SmartOS 11.1.1.1) devices enable the SSH service by default and have a hidden, undocumented, hard-coded support account whose password is based on the devices MAC address. All of the devices internet interfaces s

How urgent is CVE-2024-39345?

Priority 36/100. High severity

Related CVEs

CVE-2024-31977 HIGH 8.8 UPGRADE MITIGATE Adtran 834-5 11.1.0.101-202106231430, and fixed as of SmartOS Version 12.6.3.1, devices allow OS Command Injec
CVE-2024-31970 HIGH 8.8 UPGRADE AdTran SRG 834-5 HDC17600021F1 devices (with SmartOS 11.1.1.1 and fixed in Version 12.1.3.1) have SSH enabled

References

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