How severe is CVE-2023-52353?

CVE-2023-52353 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 none, integrity high, and availability none.

Is CVE-2023-52353 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-52353?

CVE-2023-52353 affects Arm Mbed Tls. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-52353?

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-2023-52353 have an EU (EUVD) identifier?

Yes. CVE-2023-52353 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-57010.

When was CVE-2023-52353 published?

CVE-2023-52353 was published on 2024-01-21 and last updated on 2026-06-17.

CVE-2023-52353

CVE-2023-52353 is a high-severity vulnerability in Arm Mbed Tls 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-384.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (37th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-57010
Weakness: CWE-384
Affected product: Arm Mbed Tls
Published: 2024-01-21
Last modified: 2026-06-17

Description

An issue was discovered in Mbed TLS through 3.5.1. In mbedtls_ssl_session_reset, the maximum negotiable TLS version is mishandled. For example, if the last connection negotiated TLS 1.2, then 1.2 becomes the new maximum.

Frequently asked questions

What is CVE-2023-52353?: An issue was discovered in Mbed TLS through 3.5.1. In mbedtls_ssl_session_reset, the maximum negotiable TLS version is mishandled. For example, if the last connection negotiated TLS 1.2, then 1.2 becomes the new maximum.
How severe is CVE-2023-52353?: CVE-2023-52353 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 none, integrity high, and availability none.
Is CVE-2023-52353 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-52353?: CVE-2023-52353 affects Arm Mbed Tls. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-52353?: 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-2023-52353 have an EU (EUVD) identifier?: Yes. CVE-2023-52353 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-57010.
When was CVE-2023-52353 published?: CVE-2023-52353 was published on 2024-01-21 and last updated on 2026-06-17.

References

https://github.com/Mbed-TLS/mbedtls/issues/8654

Affected products (1)

cpe:2.3:a:arm:mbed_tls:*:*:*:*:*:*:*:*

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