How severe is CVE-2024-39345?

CVE-2024-39345 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2024-39345 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-39345?

CVE-2024-39345 affects Adtran Sdg Smartos. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-39345?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2024-39345 have an EU (EUVD) identifier?

Yes. CVE-2024-39345 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-37909.

When was CVE-2024-39345 published?

CVE-2024-39345 was published on 2024-07-24 and last updated on 2026-06-17.

CVE-2024-39345

CVE-2024-39345 is a high-severity vulnerability in Adtran Sdg Smartos with a CVSS 3.x base score of 7.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-78.

Key facts

Severity: High (CVSS 3.x base score 7.2)
EPSS exploit prediction: 1% (41st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-37909
Weakness: CWE-78
Affected product: Adtran Sdg Smartos
Published: 2024-07-24
Last modified: 2026-06-17

Description

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 address or via the BSSID. An attacker can then execute arbitrary OS commands with root-level privileges. NOTE: The vendor states that there is no intended functionality allowing an attacker to execute arbitrary OS Commands with root-level privileges. The vendor also states that this issue was fixed in SmartOS 12.5.5.1.

Frequently asked questions

What is CVE-2024-39345?: 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 address or via the BSSID. An attacker can then execute arbitrary OS commands with root-level privileges. NOTE: The vendor states that there is no intended functionality allowing an attacker to execute arbitrary OS Commands with root-level privileges. The vendor also states that this issue was fixed in SmartOS 12.5.5.1.
How severe is CVE-2024-39345?: CVE-2024-39345 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2024-39345 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-39345?: CVE-2024-39345 affects Adtran Sdg Smartos. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-39345?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2024-39345 have an EU (EUVD) identifier?: Yes. CVE-2024-39345 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-37909.
When was CVE-2024-39345 published?: CVE-2024-39345 was published on 2024-07-24 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:adtran:sdg_smartos:*:*:*:*:*:*:*:*

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