Threats / Mitel / CVE-2022-29499
CVE-2022-29499
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-09-19
Mitel MiVoice Connect vulnerability
Mitel MiVoice Connect Service Appliance allows remote code execution through improper input validation, enabling unauthenticated attackers to execute arbitrary commands.
Verdict
Today item, not a backlog item.
A remote code execution vulnerability in the Service Appliance component of Mitel MiVoice Connect due to insufficient input validation. The vulnerability has been actively exploited in the wild and leveraged in ransomware campaigns, posing critical risk to affected deployments.
CISA KEV Yes · 2022-06-274Ransomware use Flagged4EPSS 0.55595 (verify live)5CVSS 9.8 (CISA)3CISA SSVC Exploitation: active · Automatable: yes · Impact: total3
01
Is it exploitable?
— the evidence, ranked above the scoreReported exploitation
18 independent public reports of in-the-wild exploitation are cataloged.Distinct reporting sources (vendor, incident response, government); open them for the underlying claims.
Exploited in the wild
Listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-06-27), flagged for known ransomware use.
Probability (EPSS)
EPSS 0.55595 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
CVSS 9.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) · Affected: Mitel, MiVoice Connect. Confirm exact fixed builds in the vendor advisory.CVSS — CISA-assigned via the ADP container (CVE.org), version 3.1; the CNA left no metrics, so CISA's own score is used ahead of NVD.
Weakness (CWE)
Mapped to CWE-20 Improper Input Validation.CWE assignment from the public NVD record (may be stale); the weakness class drives how the flaw is exploited.
CISA SSVC (triage disposition)
Exploitation: active · Automatable: yes · Technical Impact: totalCISA's own stakeholder-specific triage inputs, published in the CVE record (CISA Coordinator role). NOTE: this is CISA's three decision points; the final Act/Attend/Track decision also requires a Mission & Well-being input not published here, so no overall decision is asserted.
Currency of the record
CISA added this to its KEV catalog 62 days after the CVE record was published.KEV lag = CISA-KEV dateAdded − CVE.org datePublished; a floor on how long the known-exploited flaw sat in the public record before the federal catalog listed it. Severity/weakness here is CNA- or CISA-assigned (current at disclosure), independent of NVD's analysis backlog.
02
Who’s exploiting it?
— attribution turns risk into urgencyAttribution not established
No confirmed (advisory-backed) threat-actor attribution is established for this record. Absence of a named actor is not absence of compromise — see Coverage & confidence.
03
Why it matters
— the attack path, told twice: adversary, then board1
Front door — unauthenticated access narrative 1
Attacker
I craft malicious input that bypasses validation checks in the Service Appliance component.
Business
Attackers gain initial network access to critical communications infrastructure without authentication.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
I execute arbitrary code on the compromised appliance with service-level privileges.
Business
Threat actors establish persistent control over the organization's unified communications platform.
3
Lateral reach — past segmentation narrative 3
Attacker
I deploy ransomware payloads or lateral movement tools across the internal network.
Business
Operations are disrupted through encryption of critical systems and data exfiltration.
04
What to do
— defensible action- Remediate per the vendor advisory — confirm the fixed build for your version and verify exposure.1
Say it to the boardA vulnerability with this evidence profile is a defensible budget line, not a backlog ticket — fund the change against the proof above.
05
Coverage & confidence
— what we know, and what we don’tEstablished (cited)
Coverage gaps — stated, not hidden
Disclosure & credit2
Catalogued by mitreCNA
Credited with finding itNo finder is named in the public CVE record or the scanned vendor advisory — attribution scoped to the sources checked.
Found an error? Propose a correction.
A correction is a cited counter-claim — it must cite a source,
gets reviewed by a second human, and is never auto-applied. See the
correction convention and our identity
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