CVE-2022-43716Network attack vector

Webserver restart via use-after-free

Published Apr 11, 2023 · Updated Sep 10, 2024

Use-after-free in Siemens industrial product webservers allows remote attackers to restart the webserver through unauthenticated requests. Siemens identifies the embedded webserver as the locus but has not published the affected function, request field, or precise lifetime error. Network access to an enabled webserver is required, and successful exploitation interrupts only that web service by forcing its restart.

CVSS severity7.5
High
EPSS probability0.95%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Siemens industrial product webservers allows remote attackers to restart the webserver through unauthenticated requests. Siemens identifies the embedded webserver as the locus but has not published the affected function, request field, or precise lifetime error. Network access to an enabled webserver is required, and successful exploitation interrupts only that web service by forcing its restart.

The record

CVE
CVE-2022-43716
Published
Apr 11, 2023
Updated
Sep 10, 2024
Vendor
Siemens
Product
SIPLUS S7-1200 CP 1243-1 RAIL
Classifications
CWE-416, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 11, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 10, 2024Record 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 <=*
  2. Affected versionversion=0 <V3.4.29

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Siemens · SIPLUS S7-1200 CP 1243-1 RAILversion=0 <=*; version=0 <V3.4.29
Siemens · SIMATIC CP 1243-1version=0 <=*; version=0 <V3.4.29
Siemens · SIMATIC CP 1542SP-1version=0 <v2.3; version=0 <V2.3
Siemens · SIMATIC CP 1243-8version=0 <=*
Siemens · SIMATIC CP 1543SP-1version=0 <v2.3; version=0 <V2.3
Siemens · SIPLUS NET CP 443-1version=0 <v3.3; version=0 <V3.3
Siemens · TIM 1531 IRCversion=0 <V2.3.6
Siemens · SIMATIC CP 1242-7 V2version=0 <V3.4.29
Siemens · SIPLUS NET CP 1242-7 V2version=0 <=*; version=0 <V3.4.29
Siemens · SIMATIC CP 443-1version=0 <v3.3; version=0 <V3.3
Siemens · SIPLUS TIM 1531 IRCversion=0 <v2.3.6; version=0 <V2.3.6
Siemens · SIMATIC CP 1243-8 IRCversion=0 <V3.4.29
Siemens · SIPLUS NET CP 443-1 Advancedversion=0 <v3.3; version=0 <V3.3
Siemens · SIMATIC CP 1242-7 GPRS V2version=0 <=*
Siemens · SIMATIC CP 1243-7 LTE USversion=0 <=*; version=0 <V3.4.29
Siemens · SIMATIC CP 443-1 Advancedversion=0 <v3.3; version=0 <V3.3
Siemens · SIMATIC CP 1542SP-1 IRCversion=0 <v2.3; version=0 <V2.3
Siemens · SIMATIC CP 1243-1 IECversion=0 <=*; version=0 <V3.4.29
Siemens · SIPLUS ET 200SP CP 1543SP-1 ISEC TX RAILversion=0 <v2.3; version=0 <V2.3
Siemens · SIPLUS S7-1200 CP 1243-1version=0 <=*; version=0 <V3.4.29
Siemens · SIMATIC CP 1243-7 LTE EUversion=0 <=*; version=0 <V3.4.29
Siemens · SIPLUS ET 200SP CP 1543SP-1 ISECversion=0 <v2.3; version=0 <V2.3
Siemens · SIPLUS ET 200SP CP 1542SP-1 IRC TX RAILversion=0 <v2.3; version=0 <V2.3
Siemens · SIMATIC CP 1243-1 DNP3version=0 <=*; version=0 <V3.4.29

Published CVSS scores

7.5Siemens AGCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1499.004Application or System Exploitation

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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