CVE-2026-75126

MEDIUMPre-NVD 4.94.9
EchelonGraph scoreMEDIUM confidence

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

Score 4.9 from GitHub Security Advisory published 2026-08-28. A secondary CVSS source baseline 4.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source

Also known asEUVD-2026-67786 (ENISA EUVD) · GHSA-r4jg-62xg-rrfv (GitHub Security Advisories)Source: ENISA EUVD

4.9EG
EchelonGraph verdictMonitorNo release containing the referenced fix is confirmed: check the referenced fix and the vendor's advisory for a release that contains it; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.6%CVSS: 4.9Exploit: None knownExposed 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).

PLANET GS-4210-16P2S V3 firmware before 3.441b260626 contains multiple authenticated stack buffer overflow vulnerabilities in /cgi-bin/dispatcher.cgi. The following handlers copy attacker-controlled POST parameters into fixed-size stack buffers without length validation: web_vlan_membership_edit_dialog_post; web_dai_vlan_post; web_poe_alive_rmtip_post; web_sys_sntp_post; web_tool_upgradeManager_post; web_port_countersClr_post; web_rmon_statisticsClr_post; web_cablediag_copper_post; web_aaa_*Authlist* handlers; web_acl_mgmt_Rules_Apply_post; web_acl_mgmt_Rules_Edit_post; web_acl_*AceDel_post handlers; web_acl_*AceAdd/Edit_post handlers; web_acl_bindAdd_post; web_acl_bindEdit_post; web_snmp_v3view_add_post; web_snmp_v3group_add_post; web_snmp_v3community_add_post; web_snmp_v3host_add_post; web_snmp_notifyv3_add_post; web_snmp_v3user_add_post; web_snmpv3_remote_engineId_add_post; web_stp_globalSetting_post; web_isg_db_post; web_tacplus*_post handlers; web_dhcp_option82_post; and web_dhcp_port_option82_cid_post. A remote authenticated attacker can send crafted requests to crash the CGI process or web management service, resulting in denial of service.

CVSS v3
4.9
EG Score
4.9MEDIUMmedium confidence
EG Risk
22
EG Risk 22/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity49% × 45%
Impact severity (EG Severity): CVSS 4.9 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.6% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (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; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule.
EPSS PROB
0.6%
EPSS %ILE
48th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (4.9): severity, escalated by confirmed exploitation. This CVE's 4.9 is its impact severity (EG Severity), not escalated.

EG Severity
4.9 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.6% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-24). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says. In the directive's words, “Fix on system upgrade” means that, “unless conditions change”, the vulnerability “should be remediated the next time the vulnerable asset receives a scheduled major upgrade or rebuild”: its timelines are “dynamic as facts change”, and a KEV listing shortens them.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

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; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule.

Exploitation none (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.

No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says. In the directive's words, “Fix on system upgrade” means that, “unless conditions change”, the vulnerability “should be remediated the next time the vulnerable asset receives a scheduled major upgrade or rebuild”: its timelines are “dynamic as facts change”, and a KEV listing shortens them.

The score's inputs: 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 28, 2026

Last Modified

September 8, 2026

Advisory Details (2)

Auto-updated Aug 28, 2026
Fix referenced — no release confirmed yet.
Web page

PLANET GS-4210-16P2S Stack Buffer Overflow via dispatcher.cgi Standard Handlers | Advisories | VulnCheck

https://www.vulncheck.com/advisories/planet-gs-4210-16p2s-stack-buffer-overflow-via-dispatcher-cgi-standard-handlers
Web page

PLANET GS-4210-16P2S V3 - Security Advisory - PLANET Technology

https://www.planet.com.tw/en/support/security-advisory/10

Vendor Advisories for CVE-2026-75126(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 7× 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.

Showing the most recent 100 of 149 refreshes on record for this CVE.

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. None are among the latest 100 rows. The 49 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  2. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  3. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  4. 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  5. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  6. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  7. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  8. 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  9. 2026-10-25 14:03 UTCEG score recompute
  10. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  11. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  12. 2026-10-22 18:58 UTCEG score recompute
  13. 2026-10-22 18:57 UTCGHSA enrichmentGHSA-r4jg-62xg-rrfv · GitHub CVSS 4.9
  14. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  15. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  16. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  17. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  18. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  19. 2026-10-18 03:13 UTCEG score recompute
  20. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  21. 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  22. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  23. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  24. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  25. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.6% · 47th percentile
Show 75 more
  1. 2026-10-12 15:39 UTCEG score recompute
  2. 2026-10-11 19:25 UTCEG score recompute
  3. 2026-10-11 16:40 UTCEG score recompute
  4. 2026-10-11 14:00 UTCEG score recompute
  5. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  6. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  7. 2026-10-10 05:17 UTCEG score recompute
  8. 2026-10-10 05:17 UTCGHSA enrichmentGHSA-r4jg-62xg-rrfv · GitHub CVSS 4.9
  9. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  10. 2026-10-09 02:41 UTCEG score recompute
  11. 2026-10-09 02:41 UTCGHSA enrichmentGHSA-r4jg-62xg-rrfv · GitHub CVSS 4.9
  12. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  13. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  14. 2026-10-07 09:11 UTCEG score recompute
  15. 2026-10-07 09:11 UTCGHSA enrichmentGHSA-r4jg-62xg-rrfv · GitHub CVSS 4.9
  16. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  17. 2026-10-06 07:28 UTCEG score recompute
  18. 2026-10-06 07:28 UTCGHSA enrichmentGHSA-r4jg-62xg-rrfv · GitHub CVSS 4.9
  19. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  20. 2026-10-05 03:56 UTCEG score recompute
  21. 2026-10-05 03:56 UTCGHSA enrichmentGHSA-r4jg-62xg-rrfv · GitHub CVSS 4.9
  22. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  23. 2026-10-04 02:12 UTCEG score recompute
  24. 2026-10-04 02:12 UTCGHSA enrichmentGHSA-r4jg-62xg-rrfv · GitHub CVSS 4.9
  25. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  26. 2026-10-03 00:28 UTCEG score recompute
  27. 2026-10-03 00:28 UTCGHSA enrichmentGHSA-r4jg-62xg-rrfv · GitHub CVSS 4.9
  28. 2026-10-01 21:32 UTCEG score recompute
  29. 2026-10-01 21:32 UTCGHSA enrichmentGHSA-r4jg-62xg-rrfv · GitHub CVSS 4.9
  30. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  31. 2026-09-30 19:49 UTCEG score recompute
  32. 2026-09-30 19:49 UTCGHSA enrichmentGHSA-r4jg-62xg-rrfv · GitHub CVSS 4.9
  33. 2026-09-29 15:24 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  34. 2026-09-29 14:12 UTCEG score recompute
  35. 2026-09-29 14:12 UTCGHSA enrichmentGHSA-r4jg-62xg-rrfv · GitHub CVSS 4.9
  36. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  37. 2026-09-28 11:33 UTCEG score recompute
  38. 2026-09-28 11:33 UTCGHSA enrichmentGHSA-r4jg-62xg-rrfv · GitHub CVSS 4.9
  39. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  40. 2026-09-27 09:50 UTCEG score recompute
  41. 2026-09-27 09:50 UTCGHSA enrichmentGHSA-r4jg-62xg-rrfv · GitHub CVSS 4.9
  42. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  43. 2026-09-26 08:08 UTCEG score recompute
  44. 2026-09-26 08:07 UTCGHSA enrichmentGHSA-r4jg-62xg-rrfv · GitHub CVSS 4.9
  45. 2026-09-26 00:28 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  46. 2026-09-25 00:12 UTCEG score recompute
  47. 2026-09-25 00:12 UTCGHSA enrichmentGHSA-r4jg-62xg-rrfv · GitHub CVSS 4.9
  48. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  49. 2026-09-23 22:18 UTCEG score recompute
  50. 2026-09-23 22:18 UTCGHSA enrichmentGHSA-r4jg-62xg-rrfv · GitHub CVSS 4.9
  51. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  52. 2026-09-22 20:35 UTCEG score recompute
  53. 2026-09-22 20:35 UTCGHSA enrichmentGHSA-r4jg-62xg-rrfv · GitHub CVSS 4.9
  54. 2026-09-22 16:01 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  55. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  56. 2026-09-21 18:50 UTCEG score recompute
  57. 2026-09-21 18:50 UTCGHSA enrichmentGHSA-r4jg-62xg-rrfv · GitHub CVSS 4.9
  58. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  59. 2026-09-20 17:07 UTCEG score recompute
  60. 2026-09-20 17:07 UTCGHSA enrichmentGHSA-r4jg-62xg-rrfv · GitHub CVSS 4.9
  61. 2026-09-19 15:23 UTCEG score recompute
  62. 2026-09-19 15:23 UTCGHSA enrichmentGHSA-r4jg-62xg-rrfv · GitHub CVSS 4.9
  63. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  64. 2026-09-18 13:38 UTCEG score recompute
  65. 2026-09-18 13:38 UTCGHSA enrichmentGHSA-r4jg-62xg-rrfv · GitHub CVSS 4.9
  66. 2026-09-17 11:55 UTCEG score recompute
  67. 2026-09-17 11:55 UTCGHSA enrichmentGHSA-r4jg-62xg-rrfv · GitHub CVSS 4.9
  68. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  69. 2026-09-16 10:12 UTCEG score recompute
  70. 2026-09-16 10:12 UTCGHSA enrichmentGHSA-r4jg-62xg-rrfv · GitHub CVSS 4.9
  71. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  72. 2026-09-15 08:28 UTCEG score recompute
  73. 2026-09-15 08:28 UTCGHSA enrichmentGHSA-r4jg-62xg-rrfv · GitHub CVSS 4.9
  74. 2026-09-15 03:12 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  75. 2026-09-14 06:45 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-75126?
CVE-2026-75126 is a medium-severity vulnerability; its CVE record was published on August 28, 2026. PLANET GS-4210-16P2S V3 firmware before 3.441b260626 contains multiple authenticated stack buffer overflow vulnerabilities in /cgi-bin/dispatcher.cgi. The following handlers copy attacker-controlled POST parameters into fixed-size stack buffers without length validation:…
When was CVE-2026-75126 made public?
CVE-2026-75126 was made public on August 27, 2026: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on August 28, 2026. EchelonGraph's copy of the record carries a last-modified date of September 8, 2026; the record at its source may have been updated since.
Is CVE-2026-75126 actively exploited?
CVE-2026-75126 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-2026-75126?
CVE-2026-75126 has a CVSS base score of 4.9 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-75126?
A fix for CVE-2026-75126 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-2026-75126 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-75126

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