Vulnerability database
Every flaw the U.S. government’s cybersecurity agency (CISA) has confirmed attackers are using, plus the new WordPress plugin and theme bugs published each day, sorted by what they mean for a small business. We refresh it twice a day. If you see something your website or office runs, tell us.
14 results
Sep 13, 2026S2OPC through 1.7.3 contains a null pointer dereference in msg_subscription_publish_bs__alloc_notification_message_items() where a failed allocation for DataChaCVE-2026-90782 · Other software · Systerel · reported by VulnCheckMedium 6
S2OPC through 1.7.3 contains a null pointer dereference in msg_subscription_publish_bs__alloc_notification_message_items() where a failed allocation for DataChangeNotification is overwritten by a successful allocation for EventNotificationList. Attackers can trigger heap allocation failures on sessions with both data-change and event notifications to cause the server process to terminate.
- Product
- S2OPC
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Aug 31, 2026A vulnerability was identified in Systerel S2OPC up to 1.7.3.CVE-2026-82619 · Other software · Systerel · reported by VulDBLow 2.1
A vulnerability was identified in Systerel S2OPC up to 1.7.3. The impacted element is the function monitored_item_event_filter_treatment_bs__init_event_filter_ctx_and_result of the file src/ClientServer/services/bgenc/subscription_mgr.c. Such manipulation of the argument EventFilter leads to use after free. The attack may be performed from remote. The exploit is publicly available and might be used. The name of the patch is a4cee16a851b971be447a6ed531173702c722b99. It is best practice to apply a patch to resolve this issue.
- Product
- S2OPC
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Aug 31, 2026A vulnerability was determined in Systerel S2OPC up to 1.7.3.CVE-2026-82618 · Other software · Systerel · reported by VulDBMedium 5.3
A vulnerability was determined in Systerel S2OPC up to 1.7.3. The affected element is the function set_range_matrix_on_string_array of the file src/Common/opcua_types/sopc_builtintypes.c of the component String Array Range Writing. This manipulation causes out-of-bounds read. The attack is possible to be carried out remotely. The project was informed of the problem early through an issue report but has not responded yet.
- Product
- S2OPC
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Aug 22, 2026A vulnerability has been found in Systerel S2OPC up to 1.7.3.CVE-2026-78049 · Other software · Systerel · reported by VulDBLow 2.9
A vulnerability has been found in Systerel S2OPC up to 1.7.3. Impacted is the function SOPC_NodeMgtHelperInternal_AddVariableNodeAttributes of the file src/ClientServer/address_space/internal/sopc_node_mgt_helper_internal.c of the component AddNodes Service. The manipulation of the argument UserAccessLevel leads to out-of-bounds read. It is possible to initiate the attack remotely. A high degree of complexity is needed for the attack. The exploitability is considered difficult. The exploit has been disclosed to the public and may be used. The identifier of the patch is aafbd37d381b618312ebdf5ddf57027f62c14fdd. It is suggested to install a patch to address this issue.
- Product
- S2OPC
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Aug 17, 2026A heap-based out-of-bounds write vulnerability exists in S2OPC 1.7.3 in server-side EventFilter handling during CreateMonitoredItems processing.CVE-2026-67868 · Other software · reported by MITRECritical 9.8
A heap-based out-of-bounds write vulnerability exists in S2OPC 1.7.3 in server-side EventFilter handling during CreateMonitoredItems processing. This allows a remote attacker to execute arbitrary code.
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Aug 5, 2026An issue in Systerel S2OPC 1.7.3 allows a remote attacker to cause a denial of service via the event monitored-item queue resize handlingCVE-2026-67872 · Other software · reported by MITREHigh 7.5
An issue in Systerel S2OPC 1.7.3 allows a remote attacker to cause a denial of service via the event monitored-item queue resize handling
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Aug 5, 2026Buffer Overflow vulnerability in Systerel S2OPC 1.7.3 allows a remote attacker to cause a denial of service via the AddNodes, address_space_bs.c, sopc_node_mgt_CVE-2026-67871 · Other software · reported by MITREHigh 7.5
Buffer Overflow vulnerability in Systerel S2OPC 1.7.3 allows a remote attacker to cause a denial of service via the AddNodes, address_space_bs.c, sopc_node_mgt_helper_internal.c, and toolkit_test_server
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Aug 5, 2026Buffer Overflow vulnerability in Systerel S2OPC 1.7.3 allows a remote attacker to cause a denial of service via the Alarm/Conditions wrapper when processing PubCVE-2026-67867 · Other software · reported by MITREHigh 7.5
Buffer Overflow vulnerability in Systerel S2OPC 1.7.3 allows a remote attacker to cause a denial of service via the Alarm/Conditions wrapper when processing PublishResponse EventNotificationList data
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Aug 5, 2026Buffer Overflow vulnerability in Systerel S2OPC 1.7.3 allows a remote attacker to cause a denial of service via the LockedStaMac_ProcessMsg_DeleteMonitoredItemsCVE-2026-67866 · Other software · reported by MITREHigh 7.5
Buffer Overflow vulnerability in Systerel S2OPC 1.7.3 allows a remote attacker to cause a denial of service via the LockedStaMac_ProcessMsg_DeleteMonitoredItemsResponse and SOPC_StaMac_NewDeleteMonitoredItems in the client wrapper DeleteMonitoredItems path
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Aug 5, 2026S2OPC 1.7.3 contains an out-of-bounds read in RepublishResponse handling.CVE-2026-67865 · Other software · reported by MITREHigh 7.5
S2OPC 1.7.3 contains an out-of-bounds read in RepublishResponse handling. This allows a remote attacker to cause a denial of service
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Aug 4, 2026A weakness has been identified in Systerel S2OPC up to 1.7.3.CVE-2026-18790 · Other software · Systerel · reported by VulDBLow 1.9
A weakness has been identified in Systerel S2OPC up to 1.7.3. This affects the function LockedStaMac_ProcessMsg_DeleteMonitoredItemsResponse of the file src/ClientServer/frontend/client_wrapper/internal/state_machine.c of the component DeleteMonitoredItemsRequest Handler. This manipulation causes out-of-bounds read. The attack can only be executed locally. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
- Product
- S2OPC
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jul 29, 2026Improper validity period check for root issuer certificate in CycloneCrypto cryptographic wrapper of S2OPC allows a certificate issued by this root issuer to beCVE-2026-18257 · Other software · Systerel · reported by cve@gitlab.comMedium 5.6
Improper validity period check for root issuer certificate in CycloneCrypto cryptographic wrapper of S2OPC allows a certificate issued by this root issuer to be considered trusted
- Product
- S2OPC
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jun 10, 2026Improper comparison with the certificates trusted list in S2OPC allows an attacker well-formed untrusted certificate to be considered trustedCVE-2026-9758 · Other software · Systerel · reported by cve@gitlab.comHigh 7.3
Improper comparison with the certificates trusted list in S2OPC allows an attacker well-formed untrusted certificate to be considered trusted
- Product
- S2OPC
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jun 9, 2026Check for certificate revocation only considers the first matching CRL and ignores other valid CRLs of the same CA in the CycloneCrypto cryptographic wrapper ofCVE-2026-6899 · Other software · Systerel · reported by cve@gitlab.comMedium 5.6
Check for certificate revocation only considers the first matching CRL and ignores other valid CRLs of the same CA in the CycloneCrypto cryptographic wrapper of S2OPC library. It might allow connection between an OPC UA client and server using a revoked certificate.
- Product
- S2OPC
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Where this comes from: the exploited list is CISA’s Known Exploited Vulnerabilities catalog. Everything else is the whole National Vulnerability Database, where each record is published by the team that found the bug (Wordfence, Patchstack, WPScan, the vendors themselves and others); we show who. Exploit odds are FIRST’s EPSS, updated daily. Titles and categories are ours, so check the linked record before acting on a detail. For a write-up of the big ones, see our advisories. Every vendor, and every WordPress plugin and theme with a recorded flaw, also has its own page. All of it is free to reuse as JSON, CSV or RSS.
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