CVE-2022-40765
CVE-2022-40765 is a security flaw in Mitel MiVoice Connect. Someone who already has a way in can use Mitel MiVoice Connect to run their own code. The US Cybersecurity and Infrastructure Security Agency (CISA) added it to its catalog of flaws known to be used in attacks on 21 Feb 2023, 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 command injection in Mitel MiVoice Connect. In its words: “The Mitel Edge Gateway component of MiVoice Connect allows an authenticated attacker with internal network access to execute commands within the context of the system.”[1]
The CVE record adds: “A vulnerability in the Edge Gateway component of Mitel MiVoice Connect through 19.3 (22.22.6100.0) could allow an authenticated attacker with internal network access to conduct a command-injection attack, due to insufficient restriction of URL parameters.”[2]
The underlying weakness is command injection (CWE-77), in MITRE’s list of common software weaknesses.
It scores 6.8 out of 10 on the Common Vulnerability Scoring System, which rates it medium, 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 21 Feb 2023, 91 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 14 Mar 2023 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 11%. That’s in the top 5% of the flaws it scores.[4]
CISA assesses it as not automatable: each attack takes some work.
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 14 Mar 2023 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 6.8.[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 11%.[4] |
See also
Other Mitel MiVoice Connect flaws
- CVE-2022-41223: code injection ·
- CVE-2022-29499: data validation ·
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 command injection flaws
- CVE-2026-105134, AhsayCBS: command injection ·
- CVE-2026-96951, Microsoft Windows: command injection ·
- CVE-2016-3081, Apache Struts: command injection ·
- CVE-2026-8037, Progress LoadMaster: command injection ·
- CVE-2025-29635, D-Link DIR-823X: command injection ·
Added the same day
- CVE-2022-47986, IBM Aspera Faspex: code execution ·
- CVE-2022-41223, Mitel MiVoice Connect: code injection ·
Every Mitel flaw on CISA’s list · Everything added in February 2023
References
- ^ Cybersecurity and Infrastructure Security Agency. “Mitel MiVoice Connect Command Injection Vulnerability”. Known Exploited Vulnerabilities Catalog, added 21 Feb 2023.
- ^ National Institute of Standards and Technology. “CVE-2022-40765 Detail”. National Vulnerability Database, published 22 Nov 2022.
- ^ Mitel. Advisories and fixes: mitel.com, mitel.com.
- ^ FIRST. “Exploit Prediction Scoring System”. EPSS 0.106, percentile 95.8, 31 Oct 2026.
- CVE Program. “CVE-2022-40765”. 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.