What is CVE-2023-40709?

CVE-2023-40709 is a medium-severity vulnerability in Opto 22 Snap Pac S1, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.8/10. Published 2023-08-24.

How severe is CVE-2023-40709?

Medium severity. CVSS v3 base score is 6.8 out of 10.

Resource exhaustion in Opto 22 Snap Pac S1

CVE-2023-40709

An adversary could crash the entire device by sending a large quantity of ICMP requests if the controller has the built-in web server enabled but does not have the built-in web server completely set up and configured for the SNAP PAC S1 Firmware version R10.3b

Published 2023-08-24 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.006 (43.9th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 43.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Opto 22 Snap Pac S1 — versions R10.3b
Opto22 Snap Pac S1
Opto22 Snap Pac S1 Firmware — versions r10.3b

Weakness classification (CWE)

References

www.cisa.gov/news-events/ics-advisories/icsa-23-236-02 (US Government Resource, Third Party Advisory)

Frequently asked questions

What is CVE-2023-40709?: CVE-2023-40709 is a medium-severity vulnerability in Opto 22 Snap Pac S1, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.8/10. Published 2023-08-24.
How severe is CVE-2023-40709?: Medium severity. CVSS v3 base score is 6.8 out of 10.