VDB-397119 · Submit #893148 · CVE-2026-82619

Systerel S2OPC up to 1.7.3 subscription_mgr.c EventFilter use after free

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
3.9	$0-$5k	1.28+

Summaryinfo

A vulnerability identified as problematic has been detected in Systerel S2OPC up to 1.7.3. This affects the function monitored_item_event_filter_treatment_bs__init_event_filter_ctx_and_result of the file src/ClientServer/services/bgenc/subscription_mgr.c. Performing a manipulation of the argument EventFilter results in use after free. This vulnerability is cataloged as CVE-2026-82619. It is possible to initiate the attack remotely. Furthermore, there is an exploit available. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Systerel S2OPC up to 1.7.3. This affects the function monitored_item_event_filter_treatment_bs__init_event_filter_ctx_and_result of the file src/ClientServer/services/bgenc/subscription_mgr.c. The manipulation of the argument EventFilter with an unknown input leads to a use after free vulnerability. CWE is classifying the issue as CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. This is going to have an impact on availability.

It is possible to read the advisory at gitlab.com. This vulnerability is uniquely identified as CVE-2026-82619. The exploitability is told to be easy. It is possible to initiate the attack remotely. Technical details and a public exploit are known.

The exploit is shared for download at gitlab.com. It is declared as proof-of-concept.

Applying the patch a4cee16a851b971be447a6ed531173702c722b99 is able to eliminate this problem. The bugfix is ready for download at gitlab.com.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

Systerel

Name

S2OPC

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 3.9

VulDB Base Score: 4.3
VulDB Temp Score: 3.9
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
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Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: a4cee16a851b971be447a6ed531173702c722b99

Timelineinfo

08/30/2026 Advisory disclosed
08/30/2026 +0 days VulDB entry created
08/30/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: 1797
Status: Confirmed
Confirmation: 🔒

CVE: CVE-2026-82619 (🔒)
GCVE (CVE): GCVE-0-2026-82619
GCVE (VulDB): GCVE-100-397119
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 08/30/2026 10:03
Changes: 08/30/2026 10:03 (60)
Complete: 🔍
Submitter: VULL
Cache ID: 216::103

Submitinfo

Accepted

Submit #893148: Systerel S2OPC OPC UA Toolkit 1.7.3 Heap Use After Free (by VULL)