CVE-2023-40708

mediumpriority · track · 21OT risk · elevatedEPSS 0.005 · 41 %ileEUUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
0.48% (41st) EPSS
CVSS 5.3 · medium
Is it mine?
4 products
Check your exposure
Who says so?
4 sources
cnnvd · enisa_euvd · cisa_csaf_ot · nvd

EPSS · scored 2026-10-27

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.

01

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

No vendor fix yet; a mitigation is available.

  • MitigationSNAP PAC S1 Firmwarecisa_csaf_ot

    Disable the built-in web server when not in use through the Network Security settings within the OPTO 22 Pac Manager software.

02

cvss

Technical severity, 0–10. One row per scoring source.

5.8
010

base score 0–10 · higher = more severe · hover a vector to decode

v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 1.4
v3.05.3mediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:Nsecondary · CISA US
v3.15.8mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:Nsecondary · ENISA EU
v3.15.8mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:Nsecondary · ot-cert@dragos.comexploitability 3.9 · impact 1.4
v3.14.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)
03

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS
04

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-1188USCWE-284US
05

affected products (4)

Products and version ranges known to be affected.

06

advisories (1)

Vendor and ecosystem advisories describing this.

  • ICSA-23-236-02OPTO 22 SNAP PAC S12023-08-24icsa · cisa_csaf_otUS

    Successful exploitation of these vulnerabilities could allow an attacker to brute force passwords, access certain device files, or cause a denial-of-service condition.

07

also known as (3)

Other names and identifiers for this entity.

08

sources

Which sources assert this record, and when.

cnnvdenisa_euvdcisa_csaf_otnvdNVDCVE.orgMITRE
published 2023-08-24modified 2026-06-17
09

references (6)

External citations — patches, advisories, analysis.

scry

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