CVE-2021-22925curl supports the `-t` command line option, known as `CURLOPT_TELNETOPTIONS`in libcurl.
Updated under an hour ago ()
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It affects Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP and 22 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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curl supports the `-t` command line option, known as `CURLOPT_TELNETOPTIONS`in libcurl. This rarely used option is used to send variable=content pairs toTELNET servers.Due to flaw in the option parser for sending `NEW_ENV` variables, libcurlcould be made to pass on uninitialized data from a stack based buffer to theserver. Therefore potentially revealing sensitive internal information to theserver using a clear-text network protocol.This could happen because curl did not call and use sscanf() correctly whenparsing the string provided by the application.
- CVSS
- 5.3 MEDIUM (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- Weakness (CWE)
- CWE-200
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- hackerone
- NVD analysis
- Modified
- Record last updated
- Oct 14, 2026
- First seen by InfoSec Signals
- Oct 14, 2026
Affected products
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.0 before V3.1.5 | CISA ADP |
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518f_4_pn_dp_mfp (from the name) | from V3.1.0 before V3.1.5 | CISA ADP |
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP siemens:siplus_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.0 before V3.1.5 | CISA ADP |
haxx curl haxx:curl | from 7.7 before 7.78.0 | NVD |
fedoraproject fedora fedoraproject:fedora | 33 | NVD |
netapp cloud_backup netapp:cloud_backup | all versions | NVD |
netapp clustered_data_ontap netapp:clustered_data_ontap | all versions | NVD |
netapp hci_management_node netapp:hci_management_node | all versions | NVD |
netapp solidfire netapp:solidfire | all versions | NVD |
apple mac_os_x apple:mac_os_x | 10.15.7; 10.15.7; 10.15.7; 10.15.7; 10.15.7 | NVD |
apple macos apple:macos | 11.0; 11.0.1; 11.1; 11.1.0; 11.2; 11.2.1; 11.3; 11.3.1; and 2 more ranges | NVD |
oracle mysql_server oracle:mysql_server | from 5.7.0 through 5.7.35; from 8.0.0 through 8.0.26 | NVD |
oracle peoplesoft_enterprise_peopletools oracle:peoplesoft_enterprise_peopletools | 8.57; 8.58; 8.59 | NVD |
siemens sinec_infrastructure_network_services siemens:sinec_infrastructure_network_services | before 1.0.1.1 | NVD |
siemens sinema_remote_connect_server siemens:sinema_remote_connect_server | before 3.1 | NVD |
netapp h300s_firmware netapp:h300s_firmware | all versions | NVD |
netapp h500s_firmware netapp:h500s_firmware | all versions | NVD |
netapp h700s_firmware netapp:h700s_firmware | all versions | NVD |
netapp h300e_firmware netapp:h300e_firmware | all versions | NVD |
netapp h500e_firmware netapp:h500e_firmware | all versions | NVD |
netapp h700e_firmware netapp:h700e_firmware | all versions | NVD |
netapp h410s_firmware netapp:h410s_firmware | all versions | NVD |
splunk universal_forwarder splunk:universal_forwarder | from 8.2.0 before 8.2.12; from 9.0.0 before 9.0.6; 9.1.0 | NVD |
References
- https://hackerone.com/reports/1223882exploit, issue-tracking, patch, third-party-advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FRUCW2UVNYUDZF72DQLFQR4PJEC6CF7V/vendor-advisory, mailing-list, third-party-advisory
- http://seclists.org/fulldisclosure/2021/Sep/40mailing-list, third-party-advisory
- http://seclists.org/fulldisclosure/2021/Sep/39mailing-list, third-party-advisory
- https://www.oracle.com/security-alerts/cpuoct2021.htmlpatch, third-party-advisory
- https://security.netapp.com/advisory/ntap-20210902-0003/third-party-advisory
- https://support.apple.com/kb/HT212805third-party-advisory
- https://support.apple.com/kb/HT212804third-party-advisory
- https://www.oracle.com/security-alerts/cpujan2022.htmlpatch, third-party-advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdfpatch, third-party-advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdfthird-party-advisory
- https://security.gentoo.org/glsa/202212-01vendor-advisory, third-party-advisory
- https://cert-portal.siemens.com/productcert/html/ssa-389290.html
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html
- https://cert-portal.siemens.com/productcert/html/ssa-484086.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.