CVE-2026-78049

LOWPre-NVD 3.73.7
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

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, GitHub Security Advisory, a secondary CVSS source
Trending — 4 sources updated this weekElevated
3.7EG
EchelonGraph verdictPlan mitigationRemediate within your standard update timelines (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.6%CVSS: 3.7Exploit: No code on recordExposed services: Not assessed

A fix is referenced (a reference tagged "Patch", often a source commit), but no release containing it is confirmed — find the release that contains it; until it is applied, mitigate (WAF / firewall / segmentation).

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.

CVSS v3
3.7
EG Score
3.7LOWmedium confidence
EG Risk
33
EG Risk 33/100

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 computed (value × EchelonGraph’s weight)
Severity37% × 45%
The EG Score, 3.7 of 10.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it and apply that within your standard update timelines; until then, restrict network exposure of the affected system or apply the vendor's mitigation.
EPSS PROB
0.6%
EPSS %ILE
48th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

A fix is referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it and apply that within your standard update timelines; until then, restrict network exposure of the affected system or apply the vendor's mitigation.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

August 22, 2026

Last Modified

October 12, 2026

References (8)

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 15× in last 7d / 50× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 4 repeat rows among the latest 95 are merged into the row they repeat.

  1. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  2. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  3. 2026-10-12 16:33 UTCGHSA enrichmentGHSA-cq93-frxj-593v · GitHub severity LOW · GitHub CVSS 3.7
  4. 2026-10-12 16:25 UTCNVD updateCVSS v4 → 2.9
  5. 2026-10-12 15:37 UTCEG score recompute
  6. 2026-10-11 19:23 UTCEG score recompute
  7. 2026-10-11 16:39 UTCEG score recompute
  8. 2026-10-11 13:57 UTCEG score recompute
  9. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  10. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  11. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  12. 2026-10-09 05:07 UTCEG score recompute
  13. 2026-10-09 05:07 UTCGHSA enrichmentGHSA-cq93-frxj-593v · GitHub severity LOW · GitHub CVSS 3.7
  14. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  15. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  16. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  17. 2026-10-06 02:59 UTCEG score recompute
  18. 2026-10-06 02:59 UTCGHSA enrichmentGHSA-cq93-frxj-593v · GitHub severity LOW · GitHub CVSS 3.7
  19. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  20. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  21. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  22. 2026-10-03 02:28 UTCEG score recompute
  23. 2026-10-03 02:28 UTCGHSA enrichmentGHSA-cq93-frxj-593v · GitHub severity LOW · GitHub CVSS 3.7
  24. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  25. 2026-09-30 07:23 UTCEG score recompute
Show 66 more
  1. 2026-09-30 07:23 UTCGHSA enrichmentGHSA-cq93-frxj-593v · GitHub severity LOW · GitHub CVSS 3.7
  2. 2026-09-29 15:24 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  3. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  4. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  5. 2026-09-27 10:59 UTCEG score recompute
  6. 2026-09-27 10:59 UTCGHSA enrichmentGHSA-cq93-frxj-593v · GitHub severity LOW · GitHub CVSS 3.7
  7. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  8. 2026-09-26 00:28 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  9. 2026-09-24 15:37 UTCEG score recompute
  10. 2026-09-24 15:37 UTCGHSA enrichmentGHSA-cq93-frxj-593v · GitHub severity LOW · GitHub CVSS 3.7
  11. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  12. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  13. 2026-09-22 16:01 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  14. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  15. 2026-09-21 20:38 UTCEG score recompute
  16. 2026-09-21 20:38 UTCGHSA enrichmentGHSA-cq93-frxj-593v · GitHub severity LOW · GitHub CVSS 3.7
  17. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  18. 2026-09-19 01:39 UTCEG score recompute
  19. 2026-09-19 01:39 UTCGHSA enrichmentGHSA-cq93-frxj-593v · GitHub severity LOW · GitHub CVSS 3.7
  20. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  21. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  22. 2026-09-16 06:40 UTCEG score recompute
  23. 2026-09-16 06:40 UTCGHSA enrichmentGHSA-cq93-frxj-593v · GitHub severity LOW · GitHub CVSS 3.7
  24. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  25. 2026-09-15 03:12 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  26. 2026-09-13 11:41 UTCEG score recompute
  27. 2026-09-13 11:41 UTCGHSA enrichmentGHSA-cq93-frxj-593v · GitHub severity LOW · GitHub CVSS 3.7
  28. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  29. 2026-09-10 16:42 UTCEG score recompute
  30. 2026-09-10 16:42 UTCGHSA enrichmentGHSA-cq93-frxj-593v · GitHub severity LOW · GitHub CVSS 3.7
  31. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  32. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  33. 2026-09-07 21:43 UTCEG score recompute
  34. 2026-09-07 21:43 UTCGHSA enrichmentGHSA-cq93-frxj-593v · GitHub severity LOW · GitHub CVSS 3.7
  35. 2026-09-06 13:48 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  36. 2026-09-05 02:45 UTCEG score recompute
  37. 2026-09-05 02:44 UTCGHSA enrichmentGHSA-cq93-frxj-593v · GitHub severity LOW · GitHub CVSS 3.7
  38. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  39. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  40. 2026-09-02 07:43 UTCEG score recompute
  41. 2026-09-02 07:43 UTCGHSA enrichmentGHSA-cq93-frxj-593v · GitHub severity LOW · GitHub CVSS 3.7
  42. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  43. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  44. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  45. 2026-08-30 12:40 UTCEG score recompute
  46. 2026-08-30 12:40 UTCGHSA enrichmentGHSA-cq93-frxj-593v · GitHub severity LOW · GitHub CVSS 3.7
  47. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  48. 2026-08-28 21:42 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  49. 2026-08-27 17:37 UTCEG score recompute
  50. 2026-08-27 17:37 UTCGHSA enrichmentGHSA-cq93-frxj-593v · GitHub severity LOW · GitHub CVSS 3.7
  51. 2026-08-27 17:23 UTCNVD updateCVSS v4 → 2.9
  52. 2026-08-27 17:17 UTCEG score recompute
  53. 2026-08-27 17:17 UTCGHSA enrichmentGHSA-cq93-frxj-593v · GitHub severity LOW · GitHub CVSS 3.7
  54. 2026-08-27 16:43 UTCMITRE cvelistV5CVSS v4 → 6.3
  55. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  56. 2026-08-27 11:46 UTCEG score recompute
  57. 2026-08-27 11:46 UTCGHSA enrichmentGHSA-cq93-frxj-593v · GitHub severity LOW · GitHub CVSS 3.7
  58. 2026-08-26 14:47 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  59. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  60. 2026-08-24 16:47 UTCEG score recompute
  61. 2026-08-24 16:47 UTCGHSA enrichmentGHSA-cq93-frxj-593v · GitHub severity LOW · GitHub CVSS 3.7
  62. 2026-08-24 14:18 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  63. 2026-08-22 23:23 UTCEG score recompute
  64. 2026-08-22 23:22 UTCNVD updateCVSS v4 → 2.9
  65. 2026-08-22 22:36 UTCEG score recomputeFirst assessed: 3.7 LOW
  66. 2026-08-22 22:35 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-78049?
CVE-2026-78049 is a low-severity vulnerability; its CVE record was 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 the CVE record for CVE-2026-78049 published?
The CVE record for CVE-2026-78049 was published on August 22, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of October 12, 2026; the record at its source may have been updated since.
Is CVE-2026-78049 actively exploited?
CVE-2026-78049 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.6% probability of exploitation in the next 30 days (48th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-78049?
CVE-2026-78049 has a CVSS base score of 3.7 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-78049?
A fix for CVE-2026-78049 is referenced (a reference tagged "Patch", often a source commit), but EchelonGraph has no release containing it on record. Check that reference and the vendor's advisory for a release that contains the fix and update to it; until then, restrict network exposure of the affected system or apply the vendor's mitigation. The vendor advisories EchelonGraph has for CVE-2026-78049 are linked in the Vendor Advisories panel on this page.

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