CVE-2023-40707Network attack vector

Account compromise via unrestricted password selection

Published Aug 24, 2023 · Updated Oct 2, 2024

Weak password requirements in the built-in web server of Opto 22 SNAP PAC S1 R10.3b allow remote attackers to brute-force credentials. The server accepts administrator passwords without complexity requirements, leaving user-selected weak credentials susceptible to repeated guessing. Network access to the enabled web server and a weak configured password are required; successful guessing grants the privileges of the compromised account.

CVSS severity8.6
High
EPSS probability0.58%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Weak password requirements in the built-in web server of Opto 22 SNAP PAC S1 R10.3b allow remote attackers to brute-force credentials. The server accepts administrator passwords without complexity requirements, leaving user-selected weak credentials susceptible to repeated guessing. Network access to the enabled web server and a weak configured password are required; successful guessing grants the privileges of the compromised account.

The record

CVE
CVE-2023-40707
Published
Aug 24, 2023
Updated
Oct 2, 2024
Vendor
Opto 22
Product
SNAP PAC S1
Classifications
CWE-521, T1110
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 24, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=r10.3b
  2. Affected versionversion=R10.3b

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Opto 22 · SNAP PAC S1version=r10.3b; version=R10.3b

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
8.6Dragos, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-521Weak Password Requirements
T1110Brute Force

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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