TI-2023-21493 Aliases CVE-2023-40708 GHSA-g4pv-ghw3-xqxj

Improper Access Control in OPTO 22 SNAP PAC S1

LOW 33CWE-1188Published 2023-08-24 · Updated 2024-10-02

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: Low · None · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00477 41st percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
OPTO 22	SNAP PAC S1	R10.3b	—	No fix listed	CNA

SNAP PAC S1 VendorOPTO 22 Affected R10.3b Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:o:opto22:snap_pac_s1_firmware:r10.3b:::::::*	r10.3b	Vulnerable	OPTO 22
cpe:2.3:h:opto22:snap_pac_s1:-:::::::*	not specified by NVD	Running on	OPTO 22

cpe:2.3:o:opto22:snap_pac_s1_firmware:r10.3b:*:*:*:*:*:*:* Versions r10.3b Vulnerable ·OPTO 22
cpe:2.3:h:opto22:snap_pac_s1:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·OPTO 22

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2023-40708
2026-10-03 Alias added: GHSA-g4pv-ghw3-xqxj

References

Advisory 1

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

TI-2023-21491 Improper Restriction of Excessive Authentication Attempts in OPTO 22 SNAP PAC S1 Built-in Web Server CVSS 3.1CRITICAL 9.8
TI-2023-21492 Weak password requirements in OPTO 22 SNAP PAC S1 Built-in Web Server CVSS 3.1HIGH 8.6
TI-2023-21494 Uncontrolled Resource Consumption in OPTO 22 SNAP PAC S1 Built-In Web Server CVSS 3.1HIGH 7.5
TI-2023-21495 Resource allocation without limits in OPTO 22 SNAP PAC S1 CVSS 3.1HIGH 7.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences