CVE-2024-30321Network attack vector

Unauthenticated credential disclosure via web request handling

Published Jul 9, 2024 · Updated Aug 27, 2025

Information disclosure in Siemens SIMATIC WinCC and PCS 7 web applications allows remote attackers to retrieve users and passwords. WinCC WebNavigator, PCS 7 Web Server, and PCS 7 Web Diagnostics Server improperly handle certain web requests and return privileged information to unauthorized callers. Network access to an enabled application web server is required; the published impact is limited to disclosure, with no reported data modification or service interruption.

CVSS severity8.2
High
EPSS probability0.51%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Siemens SIMATIC WinCC and PCS 7 web applications allows remote attackers to retrieve users and passwords. WinCC WebNavigator, PCS 7 Web Server, and PCS 7 Web Diagnostics Server improperly handle certain web requests and return privileged information to unauthorized callers. Network access to an enabled application web server is required; the published impact is limited to disclosure, with no reported data modification or service interruption.

The record

CVE
CVE-2024-30321
Published
Jul 9, 2024
Updated
Aug 27, 2025
Vendor
Siemens
Product
SIMATIC WinCC
Classifications
CWE-359
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 9, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 27, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=0 <V7.4 SP1 Update 23
  2. Affected versionversion=0 <V7.5 SP2 Update 17
  3. Affected versionversion=0 <V8.0 Update 5
  4. Affected versionversion=7.4 <7.4_sp1_update_23
  5. Affected versionversion=7.5 <7.5_sp2_update_17
  6. Affected versionversion=8.0 <8.0_update_5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Siemens · SIMATIC WinCCversion=0 <V7.4 SP1 Update 23; version=0 <V7.5 SP2 Update 17; version=0 <V8.0 Update 5; version=7.4 <7.4_sp1_update_23; version=7.5 <7.5_sp2_update_17; version=8.0 <8.0_update_5
Siemens · SIMATIC PCS 7version=0 <V9.1 SP2 UC05; version=9.1 <10
Siemens · SIMATIC WinCC Runtime Professionalversion=0 <V18 Update 5; version=0 <V19 Update 2; version=18 <19; version=19 <19_update_2

Published CVSS scores

8.2Siemens AGCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
5.9Siemens AGCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/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-359Exposure of Private Personal Information to an Unauthorized Actor

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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