PatchTheCVECVE-2021-4228: Use of hard-coded TLS certificate by default allows an attacker to perform Man-in-the-Middle (MitM) attacks ev
CVE-2021-4228 is a medium-severity flaw (CVSS 5.8) affecting iac-ast2500 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Use of hard-coded TLS certificate by default allows an attacker to perform Man-in-the-Middle (MitM) attacks even in the presence of the HTTPS connection. This issue affects: Lanner Inc IAC-AST2500A standard firmware version 1.00.0.
Why this priority
- EPSS top 4%: very likely to be exploited
No fix is published yet: follow the downgrade or mitigation steps.
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2021-4228?
iac-ast2500 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.
Is CVE-2021-4228 being exploited?
CVE-2021-4228 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2021-4228 affect?
CVE-2021-4228 affects iac-ast2500 firmware. Severity is medium (CVSS 5.8). Use of hard-coded TLS certificate by default allows an attacker to perform Man-in-the-Middle (MitM) attacks even in the presence of the HTTPS connection. This issue affects: Lanner Inc IAC-AST2500A standard firmware version 1.00.0.
How urgent is CVE-2021-4228?
Priority 44/100. EPSS top 4%: very likely to be exploited