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.
CVE-2026-78049
LOWPre-NVD 3.73.7—Trending — 5 sources updated this weekElevated
EchelonGraph scoreHIGH confidence
Score 3.7 from GitHub Security Advisory (severity: LOW) published 2026-08-23. a secondary CVSS source baseline 3.7; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
3.7EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 3.7Exploit: Elevated riskExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 3.7
- EG Score
- 3.7(high)
- EG Risk
- 33(Track)EG Risk 33/100SSVC: Track
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity37% × 45%Exploitation40% × 40%Automatability0% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 0%
- EPSS %ILE
- 33%
- KEV
- Not listed
Published
August 22, 2026
Last Modified
August 27, 2026
References (8)
- cna@vuldbhttps://github.com/user-attachments/files/29702766/PoC.zip
- cna@vuldbhttps://gitlab.com/systerel/S2OPC/-/commit/aafbd37d381b618312ebdf5ddf57027f62c14fdd
- cna@vuldbhttps://gitlab.com/systerel/S2OPC/-/merge_requests/1826
- cna@vuldbhttps://gitlab.com/systerel/S2OPC/-/work_items/1787
- cna@vuldbhttps://vuldb.com/cve/CVE-2026-78049
- cna@vuldbhttps://vuldb.com/submit/881262
- cna@vuldbhttps://vuldb.com/vuln/394290
- cna@vuldbhttps://vuldb.com/vuln/394290/cti
Vendor Advisories for CVE-2026-78049(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Weakness Classification(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 16× in last 7d / 20× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-08-30 01:22 UTCEPSS rescore
- 2026-08-28 21:42 UTCEPSS rescore
- 2026-08-27 17:37 UTCEG score recompute
- 2026-08-27 17:37 UTCGHSA enrichment
- 2026-08-27 17:23 UTCNVD updateCVSS v4 → 2.9
- 2026-08-27 17:17 UTCEG score recompute
- 2026-08-27 17:17 UTCGHSA enrichment
- 2026-08-27 16:43 UTCMITRE cvelistV5CVSS v4 → 6.3
- 2026-08-27 14:25 UTCEPSS rescore
- 2026-08-27 11:46 UTCEG score recompute
- 2026-08-27 11:46 UTCGHSA enrichment
- 2026-08-26 14:47 UTCEPSS rescore
- 2026-08-25 13:49 UTCEPSS rescore
- 2026-08-24 16:47 UTCEG score recompute
- 2026-08-24 16:47 UTCGHSA enrichment
- 2026-08-24 14:18 UTCEPSS rescore
- 2026-08-22 23:23 UTCEG score recompute
- 2026-08-22 23:22 UTCNVD updateCVSS v4 → 2.9
- 2026-08-22 22:36 UTCEG score recompute
- 2026-08-22 22:35 UTCMITRE cvelistV5first tracked
Related CVEs(same CWE)
Same CWE
10 shownCWE-119
- CVE-2003-0819EG 10.0EPSS p99HIGH
- CVE-2003-0903EG 10.0EPSS p98HIGH
- CVE-2003-1339EG 10.0EPSS p99HIGH
- CVE-2003-0095EG 10.0EPSS p96HIGH
- CVE-2002-2227EG 10.0HIGH
- CVE-2002-2248EG 10.0EPSS p93HIGH
- CVE-2002-2250EG 10.0EPSS p94HIGH
- CVE-2002-2251EG 10.0EPSS p93HIGH
- CVE-2002-2253EG 10.0EPSS p93HIGH
- CVE-2002-2257EG 10.0EPSS p92HIGH
Frequently asked(5)
What is CVE-2026-78049?
CVE-2026-78049 is a low vulnerability published on August 22, 2026. A vulnerability has been found in Systerel S2OPC up to 1.7.3. Impacted is the function SOPCNodeMgtHelperInternalAddVariableNodeAttributes of the file src/ClientServer/addressspace/internal/sopcnodemgthelper_internal.c of the component AddNodes Service. The manipulation of the argument…
When was CVE-2026-78049 disclosed?
CVE-2026-78049 was first published in the National Vulnerability Database on August 22, 2026, with the most recent update on August 27, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-78049 actively exploited?
CVE-2026-78049 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 67.3% of all scored CVEs.
What is the CVSS score of CVE-2026-78049?
CVE-2026-78049 has a CVSS v3 base score of 3.7 (NVD).
How do I remediate CVE-2026-78049?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-78049, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-78049
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