HOMEVULNERABILITIESCVE-2019-18863
MEDIUM

CVE-2019-18863

CWE-326Published: March 2, 2020· Updated: Jun 17, 2026

5.9
CVSS v3.1

Official Description

A key length vulnerability in the implementation of the SRTP 128-bit key on Mitel 6800 and 6900 SIP series phones, versions 5.1.0.2051 SP2 and earlier, could allow an attacker to launch a man-in-the-middle attack when SRTP is used in a call. A successful exploit may allow the attacker to intercept sensitive information.

NVD Source

Technical Analysis

CVE-2019-18863 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 5.9.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityHigh
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected Vendors & Products

mitel16 product(s)
6863i firmware6863i6865i firmware6865i6867i firmware6867i6869i firmware6869i6873i firmware6873i6920 firmware6920+4
Source: NVD CPE · 24 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://www.mitel.com/support/security-advisories
ADVISORYhttps://www.mitel.com/support/security-advisories/mitel-product-security-advisory-19-0006
ADVISORYhttps://www.mitel.com/support/security-advisories
ADVISORYhttps://www.mitel.com/support/security-advisories/mitel-product-security-advisory-19-0006

All References (4)

→
https://www.mitel.com/support/security-advisoriesVendor Advisory
→
https://www.mitel.com/support/security-advisories/mitel-product-security-advisory-19-0006Vendor Advisory
→
https://www.mitel.com/support/security-advisoriesVendor Advisory
→
https://www.mitel.com/support/security-advisories/mitel-product-security-advisory-19-0006Vendor Advisory

Quick Facts

CVE IDCVE-2019-18863
CVSS Score5.9 / 10
SeverityMEDIUM
WeaknessCWE-326
CISA KEVNo
Affected1 vendor(s)
PublishedMar 2, 2020

Related CVEs (CWE-326)

CVE-2020-6966
10.0
CVE-2014-9199
10.0
CVE-2026-44523
10.0
CVE-2019-15806
9.8
CVE-2019-10907
9.8
CVE-2018-0448
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2019-18863 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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