How severe is CVE-2023-27388?

CVE-2023-27388 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-27388 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-27388?

CVE-2023-27388 primarily affects Tandd Tr-71w Firmware. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-27388?

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

When was CVE-2023-27388 published?

CVE-2023-27388 was published on 2023-05-23 and last updated on 2026-06-17.

CVE-2023-27388

CVE-2023-27388 is a critical-severity vulnerability in Tandd Tr-71w Firmware with a CVSS 3.x base score of 9.8. 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: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (66th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Tandd Tr-71w Firmware
Published: 2023-05-23
Last modified: 2026-06-17

Description

Improper authentication vulnerability in T&D Corporation and ESPEC MIC CORP. data logger products allows a remote unauthenticated attacker to login to the product as a registered user. Affected products and versions are as follows: T&D Corporation data logger products (TR-71W/72W all firmware versions, RTR-5W all firmware versions, WDR-7 all firmware versions, WDR-3 all firmware versions, and WS-2 all firmware versions), and ESPEC MIC CORP. data logger products (RT-12N/RS-12N all firmware versions, RT-22BN all firmware versions, and TEU-12N all firmware versions).

Frequently asked questions

What is CVE-2023-27388?: Improper authentication vulnerability in T&D Corporation and ESPEC MIC CORP. data logger products allows a remote unauthenticated attacker to login to the product as a registered user. Affected products and versions are as follows: T&D Corporation data logger products (TR-71W/72W all firmware versions, RTR-5W all firmware versions, WDR-7 all firmware versions, WDR-3 all firmware versions, and WS-2 all firmware versions), and ESPEC MIC CORP. data logger products (RT-12N/RS-12N all firmware versions, RT-22BN all firmware versions, and TEU-12N all firmware versions).
How severe is CVE-2023-27388?: CVE-2023-27388 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-27388 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-27388?: CVE-2023-27388 primarily affects Tandd Tr-71w Firmware. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-27388?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2023-27388 published?: CVE-2023-27388 was published on 2023-05-23 and last updated on 2026-06-17.

References

Affected products (10)

cpe:2.3:o:tandd:tr-71w_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:tandd:tr-72w_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:tandd:rtr-5w_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:tandd:wdr-7_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:tandd:wdr-3_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:tandd:ws-2_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:especmic:rt-12n_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:especmic:rs-12n_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:especmic:rt-22bn_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:especmic:teu-12n_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Tandd Tr-71w Firmware

CVE-2023-27387 — High (CVSS 8.8): Cross-site request forgery (CSRF) in T&D Corporation and ESPEC MIC CORP. data logger products allows a remote…
CVE-2023-22654 — Medium (CVSS 5.4): Client-side enforcement of server-side security issue exists in T&D Corporation and ESPEC MIC CORP. data logger…
CVE-2023-23545 — Medium (CVSS 5.3): Missing authentication for critical function exists in T&D Corporation and ESPEC MIC CORP. data logger products, which…

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Other CWE-287 (Improper Authentication) vulnerabilities

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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…

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