CVE-2023-40708

Improper Access Control in OPTO 22 SNAP PAC S1

MEDIUM

5.3

CVSS Score

Published: August 24, 2023 at 04:08 PM UTC

Updated: June 17, 2026 at 06:19 AM UTC

2 products affected across 1 vendorSnap Pac S1 FirmwareSnap Pac S1

Using SNAP PAC S1 by OPTO 22?

Get instant alerts when new vulnerabilities affect SNAP PAC S1 - before attackers find them.

Real-time alertsTrack your software stackFree plan available

Start Free Sign In

Severity

MEDIUM5.3

Exploit prediction

EPSS 0.5%

SSVC

No known exploit

Description

The File Transfer Protocol (FTP) port is open by default in the SNAP PAC S1 Firmware version R10.3b. This could allow an adversary to access some device files.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Snap Pac S1 Firmware · OPTO22

95%

R10.3br10.3b

Snap Pac S1 · OPTO22device

80%

All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

Third Party AdvisoryUS Government Resource

Source: [email protected]

https://www.cisa.gov/news-events/ics-advisories/icsa-23-236-02

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUM[email protected]

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: LOW
Integrity: NONE
Availability: NONE

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-1188NVD-CWE-Other

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create account Sign in

Free plan, no card