How severe is CVE-2023-3336?

CVE-2023-3336 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2023-3336 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-3336?

CVE-2023-3336 affects Moxa Tn-5900 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-3336?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2023-3336 published?

CVE-2023-3336 was published on 2023-07-05 and last updated on 2026-06-17.

CVE-2023-3336

CVE-2023-3336 is a medium-severity vulnerability in Moxa Tn-5900 Firmware with a CVSS 3.x base score of 5.3. 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-203.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 1% (45th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-203
Affected product: Moxa Tn-5900 Firmware
Published: 2023-07-05
Last modified: 2026-06-17

Description

TN-5900 Series version 3.3 and prior versions is vulnearble to user enumeration vulnerability. The vulnerability may allow a remote attacker to determine whether a user is valid during password recovery through the web login page and enable a brute force attack with valid users.

Frequently asked questions

What is CVE-2023-3336?: TN-5900 Series version 3.3 and prior versions is vulnearble to user enumeration vulnerability. The vulnerability may allow a remote attacker to determine whether a user is valid during password recovery through the web login page and enable a brute force attack with valid users.
How severe is CVE-2023-3336?: CVE-2023-3336 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2023-3336 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-3336?: CVE-2023-3336 affects Moxa Tn-5900 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-3336?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-3336 published?: CVE-2023-3336 was published on 2023-07-05 and last updated on 2026-06-17.

References

https://www.moxa.com/en/support/product-support/security-advisory/mpsa-230401-tn-5900-series-user-enumeration-vulnerability

Affected products (1)

cpe:2.3:o:moxa:tn-5900_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Moxa Tn-5900 Firmware

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