CVE-2020-5722
CVE-2020-5722 is a security flaw in Grandstream UCM6200. Attackers can run their own code on Grandstream UCM6200 from anywhere, without logging in. The US Cybersecurity and Infrastructure Security Agency (CISA) added it to its catalog of flaws known to be used in attacks on 28 Jan 2022.[1]
Grandstream UCM6200 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.
Description
CISA calls it a networks UCM6200 series SQL injection in Grandstream UCM6200. In its words: “Grandstream UCM6200 series is vulnerable to an unauthenticated remote SQL injection via crafted HTTP request. Exploitation can allow for code execution as root.”[1]
The CVE record adds: “The HTTP interface of the Grandstream UCM6200 series is vulnerable to an unauthenticated remote SQL injection via crafted HTTP request. An attacker can use this vulnerability to execute shell commands as root on versions before 1.0.19.20 or inject HTML in password recovery emails in versions before 1.0.20.17.”[2]
The underlying weakness is SQL injection (CWE-89), 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. CISA names the product as Grandstream UCM6200.
Most families won’t have Grandstream UCM6200; it’s for whoever looks after IT at work.
Exploitation
CISA added it to its catalog of known exploited vulnerabilities on 28 Jan 2022, 676 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 28 Jul 2022 to fix it.[1]
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 84%. That’s in the top 1% of the flaws it scores.[3]
CISA assesses it as automatable: attackers can run it against many targets at once.
CISA doesn’t say who was attacked, or how.
Fix
CISA’s required action: “Apply updates per vendor instructions.”[1]
- Check whether you use it.Grandstream UCM6200 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 28 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.[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 84%.[3] |
See also
Other SQL injection flaws
- CVE-2026-114625, Arista VeloCloud Orchestrator: SQL injection ·
- CVE-2026-76461, Cisco Secure Email Gateway: SQL injection ·
- CVE-2026-9586, Sangoma Switchvox: SQL injection ·
- CVE-2026-72898, Metabase: SQL injection ·
- CVE-2026-60137, WordPress Core: SQL injection ·
Added the same day
- CVE-2022-22587, Apple iOS and macOS: memory corruption ·
- CVE-2021-20038, SonicWall SMA 100 Appliances: stack-based buffer overflow ·
- CVE-2020-0787, Microsoft Windows: background intelligent transfer service (BITS) improper privilege management ·
- CVE-2017-5689, Intel Active Management Technology (AMT), Small Business Technology (SBT), and Standard Manageability: privilege escalation ·
- CVE-2014-7169, GNU Bourne-Again Shell (Bash): arbitrary code execution ·
References
- ^ Cybersecurity and Infrastructure Security Agency. “Grandstream Networks UCM6200 Series SQL Injection Vulnerability”. Known Exploited Vulnerabilities Catalog, added 28 Jan 2022.
- ^ National Institute of Standards and Technology. “CVE-2020-5722 Detail”. National Vulnerability Database, published 23 Mar 2020.
- ^ FIRST. “Exploit Prediction Scoring System”. EPSS 0.843, percentile 99.7, 31 Oct 2026.
- CVE Program. “CVE-2020-5722”. 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.