CVE-2026-36355

HIGHPre-NVD 7.77.7—
EchelonGraph scoreMEDIUM confidence

Score 7.7 from GitHub Security Advisory (severity: HIGH) published 2026-05-05. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.7; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Elevated
7.7EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.7Exploit: Elevated riskExposed: 0

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

The rtl8192cd Wi-Fi kernel driver in the Realtek rtl819x Jungle SDK (all known versions through v3.4.14B) does not perform any access control checks on the write_mem (ioctl 0x89F5) and read_mem (ioctl 0x89F6) debug handlers, which are compiled into production builds via the unconditionally defined _IOCTL_DEBUG_CMD_ macro in 8192cd_cfg.h

CVSS v3
7.7
EG Score
7.7(medium)
EG Risk
51(Track*)
EG Risk 51/100SSVC: 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
Severity77% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
1%
EPSS %ILE
50%
KEV
Not listed

Published

May 5, 2026

Last Modified

July 5, 2026

Advisory Details (1)

Auto-updated May 6, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

GitHub - totekuh/CVE-2026-36355: CVE-2026-36355: Realtek rtl819x Jungle SDK - Unauthenticated Kernel Memory Read/Write via Debug ioctls · GitHub

https://github.com/totekuh/CVE-2026-36355

Weakness Classification(3)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 29× 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.

Showing the most recent 100 of 208 total refreshes for this CVE.

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

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-52580
    First seen May 27, 2026

    Realtek rtl819x - Local Privilege

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-36355?
CVE-2026-36355 is a high vulnerability published on May 5, 2026. The rtl8192cd Wi-Fi kernel driver in the Realtek rtl819x Jungle SDK (all known versions through v3.4.14B) does not perform any access control checks on the writemem (ioctl 0x89F5) and readmem (ioctl 0x89F6) debug handlers, which are compiled into production builds via the unconditionally defined…
When was CVE-2026-36355 disclosed?
CVE-2026-36355 was first published in the National Vulnerability Database on May 5, 2026, with the most recent update on July 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-36355 actively exploited?
CVE-2026-36355 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 49.5% of all scored CVEs.
What is the CVSS score of CVE-2026-36355?
CVE-2026-36355 has a CVSS v3.1 base score of 7.7 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-36355?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-36355, 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.

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