CVE-2023-43959Public exploitNetwork attack vector

Authenticated root command execution via diagnostic cmd injection

Published Oct 17, 2023 · Updated Sep 16, 2024

OS command injection in Yealink SIP-T19P E2 firmware 53.84.0.15 allows remote authenticated users to execute arbitrary commands. The network-diagnosis servlet passes the form-encoded cmd value to a command interpreter without neutralizing shell metacharacters. Access to the phone's web interface and a valid session are required; injected commands run as root, enabling full device control.

CVSS severity8.8
High
EPSS probability1.60%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in Yealink SIP-T19P E2 firmware 53.84.0.15 allows remote authenticated users to execute arbitrary commands. The network-diagnosis servlet passes the form-encoded cmd value to a command interpreter without neutralizing shell metacharacters. Access to the phone's web interface and a valid session are required; injected commands run as root, enabling full device control.

The record

CVE
CVE-2023-43959
Published
Oct 17, 2023
Updated
Sep 16, 2024
Vendor
Yealink
Product
Yealink SIP-T19P E2 Firmware
Classifications
CWE-78, T1059.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 17, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=53.84.0.15

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Yealink · Yealink SIP-T19P E2 Firmwareversion=53.84.0.15

Published CVSS scores

8.8NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059.004Command and Scripting Interpreter: Unix Shell

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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