CVE-2026-77217

MEDIUMPre-NVD 4.94.9—
EchelonGraph scoreHIGH confidence

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, ghsa, secondary
Trending — 3 sources updated this week
4.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.9Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

PLANET GS-4210-16P2S V3 firmware before 3.441b260626 contains authenticated stack buffer overflow and null pointer dereference vulnerabilities in /cgi-bin/dispatcher.cgi. The web_radiusSrv*_post family of handlers copies the radKey, radKey_0, radDftParamKey, radName, and radIp POST parameters into fixed-size stack buffers without length validation, and additionally dereferences radName and radIp without verifying their presence in the request. 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
4.9(high)
EG Risk
22(Track)
EG Risk 22/100SSVC: 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 computed
Severity49% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
37%
KEV
Not listed

Published

August 28, 2026

Last Modified

September 8, 2026

Advisory Details (2)

Auto-updated Aug 28, 2026
No patch confirmed yet.
generic

PLANET GS-4210-16P2S Stack Buffer Overflow and NULL Pointer Dereference via dispatcher.cgi RADIUS Handlers | Advisories | VulnCheck

https://www.vulncheck.com/advisories/planet-gs-4210-16p2s-stack-buffer-overflow-and-null-pointer-dereference-via-dispatcher-cgi-radius-handlers
generic

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

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

Vendor Advisories for CVE-2026-77217(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 17× in last 7d / 69× 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.

  1. 2026-09-19 19:22 UTCEG score recompute
  2. 2026-09-19 19:22 UTCGHSA enrichment
  3. 2026-09-18 20:01 UTCEG score recompute
  4. 2026-09-18 20:01 UTCGHSA enrichment
  5. 2026-09-18 19:28 UTCEPSS rescore
  6. 2026-09-17 20:51 UTCEG score recompute
  7. 2026-09-17 20:51 UTCGHSA enrichment
  8. 2026-09-16 18:58 UTCEG score recompute
  9. 2026-09-16 18:58 UTCGHSA enrichment
  10. 2026-09-16 14:08 UTCEPSS rescore
  11. 2026-09-16 05:15 UTCEPSS rescore
  12. 2026-09-15 18:56 UTCEG score recompute
  13. 2026-09-15 18:56 UTCGHSA enrichment
  14. 2026-09-15 03:12 UTCEPSS rescore
  15. 2026-09-14 19:46 UTCGHSA enrichment
  16. 2026-09-13 20:36 UTCEG score recompute
  17. 2026-09-13 20:36 UTCGHSA enrichment
  18. 2026-09-12 21:26 UTCEG score recompute
  19. 2026-09-12 21:26 UTCGHSA enrichment
  20. 2026-09-12 15:02 UTCEPSS rescore
  21. 2026-09-11 22:16 UTCEG score recompute
  22. 2026-09-11 22:15 UTCGHSA enrichment
  23. 2026-09-11 14:53 UTCEPSS rescore
  24. 2026-09-10 23:04 UTCEG score recompute
  25. 2026-09-10 23:03 UTCGHSA enrichment
Show 44 more
  1. 2026-09-10 09:35 UTCEPSS rescore
  2. 2026-09-09 23:53 UTCEG score recompute
  3. 2026-09-09 23:53 UTCGHSA enrichment
  4. 2026-09-08 22:01 UTCEPSS rescore
  5. 2026-09-08 20:52 UTCGHSA enrichment
  6. 2026-09-07 16:32 UTCEG score recompute
  7. 2026-09-07 16:32 UTCGHSA enrichment
  8. 2026-09-06 17:22 UTCEG score recompute
  9. 2026-09-06 17:22 UTCGHSA enrichment
  10. 2026-09-06 13:48 UTCEPSS rescore
  11. 2026-09-05 18:12 UTCEG score recompute
  12. 2026-09-05 18:11 UTCGHSA enrichment
  13. 2026-09-04 18:59 UTCEG score recompute
  14. 2026-09-04 18:59 UTCGHSA enrichment
  15. 2026-09-04 05:07 UTCEPSS rescore
  16. 2026-09-03 19:49 UTCGHSA enrichment
  17. 2026-09-02 20:38 UTCEG score recompute
  18. 2026-09-02 20:38 UTCGHSA enrichment
  19. 2026-09-02 14:12 UTCEPSS rescore
  20. 2026-09-01 21:27 UTCEG score recompute
  21. 2026-09-01 21:27 UTCGHSA enrichment
  22. 2026-09-01 20:35 UTCEG score recompute
  23. 2026-09-01 20:35 UTCGHSA enrichment
  24. 2026-09-01 18:47 UTCEG score recompute
  25. 2026-09-01 18:46 UTCGHSA enrichment
  26. 2026-09-01 13:54 UTCEPSS rescore
  27. 2026-09-01 04:40 UTCEPSS rescore
  28. 2026-09-01 04:40 UTCEPSS rescore
  29. 2026-08-31 19:32 UTCEG score recompute
  30. 2026-08-31 19:32 UTCGHSA enrichment
  31. 2026-08-31 19:09 UTCEG score recompute
  32. 2026-08-31 19:08 UTCGHSA enrichment
  33. 2026-08-31 17:58 UTCEG score recompute
  34. 2026-08-31 17:58 UTCGHSA enrichment
  35. 2026-08-30 19:18 UTCEPSS rescore
  36. 2026-08-30 19:17 UTCEPSS rescore
  37. 2026-08-30 18:46 UTCEG score recompute
  38. 2026-08-30 18:46 UTCGHSA enrichment
  39. 2026-08-30 01:22 UTCEPSS rescore
  40. 2026-08-29 19:36 UTCEG score recompute
  41. 2026-08-29 19:36 UTCGHSA enrichment
  42. 2026-08-28 20:26 UTCEG score recompute
  43. 2026-08-28 19:40 UTCEG score recompute
  44. 2026-08-28 19:36 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-77217?
CVE-2026-77217 is a medium vulnerability published on August 28, 2026. PLANET GS-4210-16P2S V3 firmware before 3.441b260626 contains authenticated stack buffer overflow and null pointer dereference vulnerabilities in /cgi-bin/dispatcher.cgi. The webradiusSrv*post family of handlers copies the radKey, radKey_0, radDftParamKey, radName, and radIp POST parameters into…
When was CVE-2026-77217 disclosed?
CVE-2026-77217 was first published in the National Vulnerability Database on August 28, 2026, with the most recent update on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-77217 actively exploited?
CVE-2026-77217 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 62.9% of all scored CVEs.
What is the CVSS score of CVE-2026-77217?
CVE-2026-77217 has a CVSS v3 base score of 4.9 (NVD).
How do I remediate CVE-2026-77217?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-77217, 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

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