CVE-2022-29499
CVE-2022-29499 is a security flaw in Mitel MiVoice Connect. Attackers can run their own code on Mitel MiVoice Connect. The US Cybersecurity and Infrastructure Security Agency (CISA) added it to its catalog of flaws known to be used in attacks on 27 Jun 2022, and says ransomware gangs have used it.[1]
Mitel MiVoice Connect is business software or equipment. Most families won’t have it, but attackers break into it to get inside companies, and from there to what those companies hold about their customers, patients and staff. Mitel has published a fix or advice.
Description
CISA calls it a data validation in Mitel MiVoice Connect. In its words: “The Service Appliance component in Mitel MiVoice Connect allows remote code execution due to incorrect data validation.”[1]
The CVE record adds: “The Service Appliance component in Mitel MiVoice Connect through 19.2 SP3 allows remote code execution because of incorrect data validation. The Service Appliances are SA 100, SA 400, and Virtual SA.”[2]
The underlying weakness is improper input validation (CWE-20), in MITRE’s list of common software weaknesses.
It scores 9.8 out of 10 on the Common Vulnerability Scoring System, which rates it critical, scored by NVD using CVSS 3.1.[2]
Affected versions
NVD’s record doesn’t list version ranges for it; Mitel’s advisory has them[3]. CISA names the product as Mitel MiVoice Connect.
Most families won’t have Mitel MiVoice Connect; it’s for whoever looks after IT at work.
Exploitation
CISA added it to its catalog of known exploited vulnerabilities on 27 Jun 2022, 62 days after it was made public. CISA lists a flaw only when it has reliable evidence of it being exploited, and gave US federal agencies until 18 Jul 2022 to fix it.[1] CISA says ransomware gangs have used it.
FIRST’s Exploit Prediction Scoring System, which estimates how likely a flaw is to be used in attacks in the next 30 days from what it sees across the internet, puts it at 55%. That’s in the top 1% of the flaws it scores.[4]
CISA assesses it as automatable: attackers can run it against many targets at once.
CISA doesn’t say who was attacked, or how.
Fix
Mitel has published a fix or advice.[3] CISA’s required action: “Apply updates per vendor instructions.”[1]
- Check whether you use it.Mitel MiVoice Connect is business software or equipment, so most families won’t have it. If you run a business, or work from home on company equipment, ask whoever looks after your IT.
- Send this page to your IT person.Ask them to confirm it’s fixed, or not in use. CISA gave US government agencies until 18 Jul 2022 to fix it.
- If it can’t be fixed, take it offline.CISA’s advice when there’s no fix is to stop using the product, or take it off the internet, until there is one.
You can’t fix someone else’s server, but you can watch for what follows a break-in like this: a breach notice, a password reset you didn’t ask for, or a scam message that knows things it shouldn’t. HARD watches for those for you and your family.
Timeline
| Date | Event |
|---|---|
| The flaw is made public in the National Vulnerability Database, with a severity score of 9.8.[2] | |
| CISA adds it to its catalog of flaws known to be used in attacks, noting that ransomware gangs have used it.[1] | |
| CISA’s deadline for US government agencies to fix it.[1] | |
| FIRST puts the odds of it being used in attacks in the next 30 days at 55%.[4] |
See also
Other Mitel MiVoice Connect flaws
- CVE-2022-41223: code injection ·
- CVE-2022-40765: command injection ·
Other Mitel flaws
- CVE-2024-41710, Mitel SIP Phones: argument injection ·
- CVE-2024-55550, Mitel MiCollab: path traversal ·
- CVE-2024-41713, Mitel MiCollab: path traversal ·
- CVE-2022-26143, Mitel MiCollab, MiVoice Business Express: access control ·
Other improper input validation flaws
- CVE-2026-93952, Arista VeloCloud Orchestrator: improper input validation ·
- CVE-2019-1068, Microsoft SQL Server: remote code execution ·
- CVE-2026-12569, PTC Windchill and FlexPLM: improper input validation ·
- CVE-2026-34910, Ubiquiti UniFi OS: improper input validation ·
- CVE-2026-6973, Ivanti Endpoint Manager Mobile (EPMM): improper input validation ·
Added the same day
- CVE-2021-4034, Red Hat Polkit: out-of-bounds read and write ·
- CVE-2021-30983, Apple iOS and iPadOS: buffer overflow ·
- CVE-2021-30533, Chrome and other Chromium browsers: security bypass ·
- CVE-2020-9907, Apple devices: memory corruption ·
- CVE-2020-3837, Apple devices: memory corruption ·
Every Mitel flaw on CISA’s list · Everything added in June 2022
References
- ^ Cybersecurity and Infrastructure Security Agency. “Mitel MiVoice Connect Data Validation Vulnerability”. Known Exploited Vulnerabilities Catalog, added 27 Jun 2022.
- ^ National Institute of Standards and Technology. “CVE-2022-29499 Detail”. National Vulnerability Database, published 26 Apr 2022.
- ^ Mitel. Advisories and fixes: mitel.com.
- ^ FIRST. “Exploit Prediction Scoring System”. EPSS 0.552, percentile 99.0, 31 Oct 2026.
- CVE Program. “CVE-2022-29499”. The official CVE record.
This article is built from CISA’s catalog (version 2026.10.30), NVD’s record and FIRST’s scores, kept in HARD’s database and checked every morning. The plain English is HARD’s.