How severe is CVE-2023-31893?

CVE-2023-31893 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 none, and availability high.

Is CVE-2023-31893 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-31893?

CVE-2023-31893 affects Telefonica Brasil Vivo Play Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-31893?

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-2023-31893 published?

CVE-2023-31893 was published on 2023-06-05 and last updated on 2026-06-17.

CVE-2023-31893

CVE-2023-31893 is a high-severity vulnerability in Telefonica Brasil Vivo Play Firmware 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-674.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (55th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-674
Affected product: Telefonica Brasil Vivo Play Firmware
Published: 2023-06-05
Last modified: 2026-06-17

Description

Telefnica Brasil Vivo Play (IPTV) Firmware: 2023.04.04.01.06.15 is vulnerable to Denial of Service (DoS) via DNS Recursion.

Frequently asked questions

What is CVE-2023-31893?: Telefnica Brasil Vivo Play (IPTV) Firmware: 2023.04.04.01.06.15 is vulnerable to Denial of Service (DoS) via DNS Recursion.
How severe is CVE-2023-31893?: CVE-2023-31893 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 none, and availability high.
Is CVE-2023-31893 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-31893?: CVE-2023-31893 affects Telefonica Brasil Vivo Play Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-31893?: 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-2023-31893 published?: CVE-2023-31893 was published on 2023-06-05 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:telefonica:brasil_vivo_play_firmware:2023.04.04.01.06.15:*:*:*:*:*:*:*

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