CVE-2023-38546Network attack vector

Cookie injection via duplicated handle filename sentinel

Published Oct 18, 2023 · Updated Jul 14, 2026

Cookie injection in libcurl 7.9.1 through 8.3.0 allows attackers to load chosen cookies from a file named none. curl_easy_duphandle copies the cookie-enabled state without cookie data and records the absent cookie source as the literal filename none. Exploitation requires a duplicated handle with cookies enabled, no prior cookie file, and a readable, correctly formatted none file in the process working directory.

CVSS severity3.7
Low
EPSS probability6.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cookie injection in libcurl 7.9.1 through 8.3.0 allows attackers to load chosen cookies from a file named none. curl_easy_duphandle copies the cookie-enabled state without cookie data and records the absent cookie source as the literal filename none. Exploitation requires a duplicated handle with cookies enabled, no prior cookie file, and a readable, correctly formatted none file in the process working directory.

The record

CVE
CVE-2023-38546
Published
Oct 18, 2023
Updated
Jul 14, 2026
Vendor
Siemens
Product
SIPLUS S7-1500 CPU 1518-4 PN/DP MFP
Classifications
CWE-73
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 18, 2023CVE publishedPublication date reported by the CVE source.
  2. Jul 14, 2026Record 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=V3.1.5 <*

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Siemens · SIPLUS S7-1500 CPU 1518-4 PN/DP MFPversion=V3.1.5 <*
Siemens · RUGGEDCOM APE1808version=0 <*
Siemens · SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPversion=V3.1.5 <*
Siemens · SIMATIC S7-1500 CPU 1518-4 PN/DP MFPversion=V3.1.5 <*
curl · curlversion=8.4.0 <8.4.0

Published CVSS scores

3.7Siemens ProductCERTCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
3.6Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/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.

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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-73External Control of File Name or Path

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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