How severe is CVE-2018-16217?

CVE-2018-16217 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-2018-16217 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-16217?

CVE-2018-16217 affects Yealink Ultra-elegant Ip Phone Sip-t41p Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-16217?

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-2018-16217 published?

CVE-2018-16217 was published on 2019-05-29 and last updated on 2026-06-17.

CVE-2018-16217

CVE-2018-16217 is a high-severity vulnerability in Yealink Ultra-elegant Ip Phone Sip-t41p 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)
CVSS v2: 9.0
EPSS exploit prediction: 3% (87th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Yealink Ultra-elegant Ip Phone Sip-t41p Firmware
Published: 2019-05-29
Last modified: 2026-06-17

Description

The network diagnostic function (ping) in the Yeahlink Ultra-elegant IP Phone SIP-T41P (firmware 66.83.0.35) allows a remote authenticated attacker to trigger OS commands or open a reverse shell via command injection.

Frequently asked questions

What is CVE-2018-16217?: The network diagnostic function (ping) in the Yeahlink Ultra-elegant IP Phone SIP-T41P (firmware 66.83.0.35) allows a remote authenticated attacker to trigger OS commands or open a reverse shell via command injection.
How severe is CVE-2018-16217?: CVE-2018-16217 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-2018-16217 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-16217?: CVE-2018-16217 affects Yealink Ultra-elegant Ip Phone Sip-t41p Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-16217?: 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-2018-16217 published?: CVE-2018-16217 was published on 2019-05-29 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:yealink:ultra-elegant_ip_phone_sip-t41p_firmware:66.83.0.35:*:*:*:*:*:*:*

More vulnerabilities in Yealink Ultra-elegant Ip Phone Sip-t41p Firmware

CVE-2018-16218 — High (CVSS 8.8): A CSRF (Cross Site Request Forgery) in the web interface of the Yeahlink Ultra-elegant IP Phone SIP-T41P firmware…
CVE-2018-16221 — High (CVSS 8.0): The diagnostics web interface in the Yeahlink Ultra-elegant IP Phone SIP-T41P (firmware 66.83.0.35) does not validate…

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