High 8.1Published Oct 21, 2019

CVE-2019-17498In libssh2 v1.9.0 and earlier versions, the SSH_MSG_DISCONNECT logic in packet.c has an integer overflow in a bounds check, enabling an attacker to specify an arbitrary (out-of-bounds) offset for a s…

Updated under an hour ago (2026-10-19 07:00 UTC)

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It affects Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP and 12 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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Every CVE for Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP

Exploited in the last 30 days

In libssh2 v1.9.0 and earlier versions, the SSH_MSG_DISCONNECT logic in packet.c has an integer overflow in a bounds check, enabling an attacker to specify an arbitrary (out-of-bounds) offset for a subsequent memory read. A crafted SSH server may be able to disclose sensitive information or cause a denial of service condition on the client system when a user connects to the server.

CVSS: 8.1 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: mitre
NVD analysis: Modified
Record last updated: Oct 14, 2026
First seen by InfoSec Signals: Oct 14, 2026

Affected products

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
libssh2 libssh2 libssh2:libssh2	through 1.9.0	NVD
fedoraproject fedora fedoraproject:fedora	30; 31	NVD
opensuse leap opensuse:leap	15.1	NVD
debian debian_linux debian:debian_linux	8.0; 9.0	NVD
netapp active_iq_unified_manager netapp:active_iq_unified_manager	all versions	NVD
netapp element_software netapp:element_software	all versions	NVD
netapp hci_management_node netapp:hci_management_node	all versions	NVD
netapp ontap_select_deploy_administration_utility netapp:ontap_select_deploy_administration_utility	all versions	NVD
netapp solidfire netapp:solidfire	all versions	NVD
netapp bootstrap_os netapp:bootstrap_os	all versions	NVD

References

https://github.com/libssh2/libssh2/blob/42d37aa63129a1b2644bf6495198923534322d64/src/packet.c#L480exploit, third-party-advisory
https://blog.semmle.com/libssh2-integer-overflow-CVE-2019-17498/broken-link
https://github.com/kevinbackhouse/SecurityExploits/tree/8cbdbbe6363510f7d9ceec685373da12e6fc752d/libssh2/out_of_bounds_read_disconnect_CVE-2019-17498exploit, third-party-advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TY7EEE34RFKCTXTMBQQWWSLXZWSCXNDB/vendor-advisory
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00026.htmlvendor-advisory, mailing-list, third-party-advisory
https://lists.debian.org/debian-lts-announce/2019/11/msg00010.htmlmailing-list, third-party-advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/22H4Q5XMGS3QNSA7OCL3U7UQZ4NXMR5O/vendor-advisory
https://github.com/libssh2/libssh2/commit/dedcbd106f8e52d5586b0205bc7677e4c9868f9cpatch, third-party-advisory
https://lists.debian.org/debian-lts-announce/2021/12/msg00013.htmlmailing-list, third-party-advisory
https://security.netapp.com/advisory/ntap-20220909-0004/third-party-advisory
http://packetstormsecurity.com/files/172835/libssh2-1.9.0-Out-Of-Bounds-Read.html
https://lists.debian.org/debian-lts-announce/2023/09/msg00006.htmlmailing-list
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.