How severe is CVE-2023-39981?

CVE-2023-39981 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2023-39981 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-2023-39981?

CVE-2023-39981 affects Moxa Mxsecurity. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-39981?

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.

When was CVE-2023-39981 published?

CVE-2023-39981 was published on 2023-09-02 and last updated on 2026-06-17.

CVE-2023-39981

CVE-2023-39981 is a high-severity vulnerability in Moxa Mxsecurity with a CVSS 3.x base score of 7.5. 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-287.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (45th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Moxa Mxsecurity
Published: 2023-09-02
Last modified: 2026-06-17

Description

A vulnerability that allows for unauthorized access has been discovered in MXsecurity versions prior to v1.0.1. This vulnerability arises from inadequate authentication measures, potentially leading to the disclosure of device information by a remote attacker.

Frequently asked questions

What is CVE-2023-39981?: A vulnerability that allows for unauthorized access has been discovered in MXsecurity versions prior to v1.0.1. This vulnerability arises from inadequate authentication measures, potentially leading to the disclosure of device information by a remote attacker.
How severe is CVE-2023-39981?: CVE-2023-39981 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2023-39981 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-2023-39981?: CVE-2023-39981 affects Moxa Mxsecurity. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-39981?: 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.
When was CVE-2023-39981 published?: CVE-2023-39981 was published on 2023-09-02 and last updated on 2026-06-17.

References

https://www.moxa.com/en/support/product-support/security-advisory/mpsa-230403-mxsecurity-series-multiple-vulnerabilities

Affected products (1)

cpe:2.3:a:moxa:mxsecurity:*:*:*:*:*:*:*:*

More vulnerabilities in Moxa Mxsecurity

CVE-2023-39979 — Critical (CVSS 9.8): There is a vulnerability in MXsecurity versions prior to 1.0.1 that can be exploited to bypass authentication. A remote…
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CVE-2023-33235 — High (CVSS 7.2): MXsecurity version 1.0 is vulnearble to command injection vulnerability. This vulnerability has been reported in the…
CVE-2023-39980 — High (CVSS 7.1): A vulnerability that allows the unauthorized disclosure of authenticated information has been identified in MXsecurity…
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Other CWE-287 (Improper Authentication) vulnerabilities

CVE-2026-45480 — Critical (CVSS 10.0): Improper authentication in Azure Active Directory allows an unauthorized attacker to elevate privileges over a network.
CVE-2026-46389 — Critical (CVSS 10.0): UDS Identity Config builds the Keycloak configuration image (realm, plugins, theme, truststore, JARs) consumed by UDS…
CVE-2026-10611 — Critical (CVSS 10.0): An authentication bypass vulnerability exists in MISP when LDAP mixed authentication is enabled with OTP enforcement.…
CVE-2026-47280 — Critical (CVSS 10.0): Improper authentication in Azure Resource Manager (ARM) allows an unauthorized attacker to elevate privileges over a…
CVE-2026-42822 — Critical (CVSS 10.0): Improper authentication in Azure Local Disconnected Operations allows an unauthorized attacker to elevate privileges…
CVE-2026-20182 — Critical (CVSS 10.0): May 2026: This security advisory provides the details and fix information for a vulnerability that was discovered and…

Browse all CWE-287 (Improper Authentication) vulnerabilities →