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Low 3.1Published Jun 11, 2021
CVE-2021-22898curl 7.7 through 7.76.1 suffers from an information disclosure when the `-t` command line option, known as `CURLOPT_TELNETOPTIONS` in libcurl, is used to send variable=content pairs to TELNET servers.
Updated under an hour ago ()
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It affects Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP and 14 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 7.7 through 7.76.1 suffers from an information disclosure when the `-t` command line option, known as `CURLOPT_TELNETOPTIONS` in libcurl, is used to send variable=content pairs to TELNET servers. Due to a flaw in the option parser for sending NEW_ENV variables, libcurl could be made to pass on uninitialized data from a stack based buffer to the server, resulting in potentially revealing sensitive internal information to the server using a clear-text network protocol.
- CVSS
- 3.1 LOW (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:H/PR:N/UI:R/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 through 7.76.1 | NVD |
debian debian_linux debian:debian_linux | 9.0 | NVD |
fedoraproject fedora fedoraproject:fedora | 33; 34 | NVD |
oracle communications_cloud_native_core_binding_support_function oracle:communications_cloud_native_core_binding_support_function | 1.11.0 | NVD |
oracle communications_cloud_native_core_network_function_cloud_native_environment oracle:communications_cloud_native_core_network_function_cloud_native_environment | 1.10.0 | NVD |
oracle communications_cloud_native_core_network_repository_function oracle:communications_cloud_native_core_network_repository_function | 1.15.0; 1.15.1 | NVD |
oracle communications_cloud_native_core_network_slice_selection_function oracle:communications_cloud_native_core_network_slice_selection_function | 1.8.0 | NVD |
oracle communications_cloud_native_core_service_communication_proxy oracle:communications_cloud_native_core_service_communication_proxy | 1.15.0 | NVD |
oracle essbase oracle:essbase | before 11.1.2.4.047; from 21.0 before 21.3 | NVD |
oracle mysql_server oracle:mysql_server | before 5.7.34; from 8.0.15 before 8.0.25 | NVD |
siemens sinec_infrastructure_network_services siemens:sinec_infrastructure_network_services | before 1.0.1.1 | 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/1176461x-refsource-misc, exploit, issue-tracking, patch, third-party-advisory
- https://curl.se/docs/CVE-2021-22898.htmlx-refsource-misc, exploit, patch, vendor-advisory
- https://github.com/curl/curl/commit/39ce47f219b09c380b81f89fe54ac586c8db6bdex-refsource-misc, patch, third-party-advisory
- https://lists.apache.org/thread.html/rc713534b10f9daeee2e0990239fa407e2118e4aa9e88a7041177497c%40%3Cissues.guacamole.apache.org%3Emailing-list, x-refsource-mlist, third-party-advisory
- https://www.oracle.com//security-alerts/cpujul2021.htmlx-refsource-misc, patch, third-party-advisory
- http://www.openwall.com/lists/oss-security/2021/07/21/4mailing-list, x-refsource-mlist, patch, third-party-advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/POOC3UV7V6L4CJ5KA2PTWTNUV5Y72T3Q/vendor-advisory, x-refsource-fedora, mailing-list, third-party-advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FRUCW2UVNYUDZF72DQLFQR4PJEC6CF7V/vendor-advisory, x-refsource-fedora, mailing-list, third-party-advisory
- https://lists.debian.org/debian-lts-announce/2021/08/msg00017.htmlmailing-list, x-refsource-mlist, third-party-advisory
- https://www.oracle.com/security-alerts/cpujan2022.htmlx-refsource-misc, patch, third-party-advisory
- https://www.oracle.com/security-alerts/cpuapr2022.htmlx-refsource-misc, patch, third-party-advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdfx-refsource-confirm, patch, third-party-advisory
- https://www.debian.org/security/2022/dsa-5197vendor-advisory, x-refsource-debian, third-party-advisory
- https://lists.debian.org/debian-lts-announce/2022/08/msg00017.htmlmailing-list, x-refsource-mlist, third-party-advisory
- https://cert-portal.siemens.com/productcert/html/ssa-398330.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.