PatchTheCVECVE-2026-3823: EHG2408 series switch developed by Atop Technologies has a Stack-based Buffer Overflow vulnerability, allowing
CVE-2026-3823 is a critical-severity flaw (CVSS 9.8) affecting atop ehg2408 firmware, atop ehg2408-2sfp firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
EHG2408 series switch developed by Atop Technologies has a Stack-based Buffer Overflow vulnerability, allowing unauthenticated remote attackers to control the program's execution flow and execute arbitrary code.
Why this priority
- Critical severity
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Last updated 2026-07-07 · 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-2026-3823?
atop ehg2408 firmware: upgrade to 3.36; atop ehg2408-2sfp firmware: upgrade to 3.36. Exact commands for each OS are on this page.
Is CVE-2026-3823 being exploited?
CVE-2026-3823 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-2026-3823 affect?
CVE-2026-3823 affects atop ehg2408 firmware, atop ehg2408-2sfp firmware. Severity is critical (CVSS 9.8). EHG2408 series switch developed by Atop Technologies has a Stack-based Buffer Overflow vulnerability, allowing unauthenticated remote attackers to control the program's execution flow and execute arbitrary code.
How urgent is CVE-2026-3823?
Priority 53/100. Critical severity; Remotely exploitable, no login, no user action