PatchTheCVECVE-2020-12022: Advantech WebAccess Node, Version 8.4.4 and prior, Version 9.0.0
CVE-2020-12022 is a critical-severity flaw (CVSS 9.8) affecting webaccess. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Advantech WebAccess Node, Version 8.4.4 and prior, Version 9.0.0. An improper validation vulnerability exists that could allow an attacker to inject specially crafted input into memory where it can be executed.
Why this priority
- Critical severity
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 9.8 (Critical) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 1.7% (top 23%) |
| CISA exploited list | No |
| Weakness | CWE-129 |
| Published | 2020-05-08 |
| Last modified | 2026-06-17 |
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-2020-12022?
webaccess: upgrade to newer than 8.4.4. Exact commands for each OS are on this page.
Is CVE-2020-12022 being exploited?
CVE-2020-12022 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-2020-12022 affect?
CVE-2020-12022 affects webaccess. Severity is critical (CVSS 9.8). Advantech WebAccess Node, Version 8.4.4 and prior, Version 9.0.0. An improper validation vulnerability exists that could allow an attacker to inject specially crafted input into memory where it can be executed.
How urgent is CVE-2020-12022?
Priority 59/100. Critical severity; Remotely exploitable, no login, no user action
Software pages
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