How severe is CVE-2023-43959?

CVE-2023-43959 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-43959 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-43959?

CVE-2023-43959 affects Yealink Sip-t19p-e2 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-43959?

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-2023-43959 published?

CVE-2023-43959 was published on 2023-10-17 and last updated on 2026-06-17.

CVE-2023-43959

CVE-2023-43959 is a high-severity vulnerability in Yealink Sip-t19p-e2 Firmware with a CVSS 3.x base score of 8.8. 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-78.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 2% (75th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Yealink Sip-t19p-e2 Firmware
Published: 2023-10-17
Last modified: 2026-06-17

Description

An issue in YeaLinkSIP-T19P-E2 v.53.84.0.15 allows a remote privileged attacker to execute arbitrary code via a crafted request the ping function of the diagnostic component.

Frequently asked questions

What is CVE-2023-43959?: An issue in YeaLinkSIP-T19P-E2 v.53.84.0.15 allows a remote privileged attacker to execute arbitrary code via a crafted request the ping function of the diagnostic component.
How severe is CVE-2023-43959?: CVE-2023-43959 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-43959 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-43959?: CVE-2023-43959 affects Yealink Sip-t19p-e2 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-43959?: 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-2023-43959 published?: CVE-2023-43959 was published on 2023-10-17 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:yealink:sip-t19p-e2_firmware:53.84.0.15:*:*:*:*:*:*:*

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