CISA KEV catalog
Confirmed active exploitation.
Listed in CISA's catalog of Known Exploited Vulnerabilities: attackers are using it in real attacks. Patch it with priority.
- Name
- Mitel SIP Phones Argument Injection Vulnerability
- Added to catalog
- Remediation due date (US federal)
- Required action
- Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Description
A vulnerability in the Mitel 6800 Series, 6900 Series, and 6900w Series SIP Phones, including the 6970 Conference Unit, through R6.4.0.HF1 (R6.4.0.136) could allow an authenticated attacker with administrative privilege to conduct an argument injection attack, due to insufficient parameter sanitization during the boot process. A successful exploit could allow an attacker to execute arbitrary commands within the context of the system.
Affected products
mitel: 6970 firmware; mitel: 6970; mitel: 6940w sip firmware; mitel: 6940w sip; mitel: 6930w sip firmware; mitel: 6930w sip; mitel: 6920w sip firmware; mitel: 6920w sip; mitel: 6920 sip firmware; mitel: 6920 sip; mitel: 6915 sip firmware; mitel: 6915 sip; mitel: 6910 sip firmware; mitel: 6910 sip; mitel: 6905 sip firmware
References4
- www.mitel.com/support/security-advisories Vendor Advisory
- www.mitel.com/support/security-advisories/mitel-product-securit… Vendor Advisory
- github.com/kwburns/CVE/blob/main/Mitel/6.3.0.1020/README.md ExploitThird Party Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=… US Government Resource
Metrics
- CVSS 3.1
-
7.2
HIGH
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 42% percentile: 99 · as of 3 November 2026
- CWE
- CWE-88
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