CVE-2023-33868Network attack vector

Credential compromise via unlimited HTTP authentication attempts

Published Jul 6, 2023 · Updated Oct 24, 2024

Improper authentication throttling in PiiGAB M-Bus SoftwarePack 900S allows remote attackers to brute-force HTTP Basic credentials. The gateway's HTTP Basic Authentication endpoint accepts repeated login attempts without a limit or disclosed rate-control mechanism. Network access to the web interface is sufficient, and a successful password guess discloses data available to the compromised account.

CVSS severity5.9
Medium
EPSS probability0.66%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication throttling in PiiGAB M-Bus SoftwarePack 900S allows remote attackers to brute-force HTTP Basic credentials. The gateway's HTTP Basic Authentication endpoint accepts repeated login attempts without a limit or disclosed rate-control mechanism. Network access to the web interface is sufficient, and a successful password guess discloses data available to the compromised account.

The record

CVE
CVE-2023-33868
Published
Jul 6, 2023
Updated
Oct 24, 2024
Vendor
PiiGAB
Product
M-Bus SoftwarePack
Classifications
CWE-307, CAPEC-16, T1110
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 6, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 24, 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=900S

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

PiiGAB · M-Bus SoftwarePackversion=900S

Published CVSS scores

5.9ICS-CERTCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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-307Improper Restriction of Excessive Authentication Attempts
CAPEC-16Dictionary-based Password Attack
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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