CVE-2026-13538

MEDIUMPre-NVD 6.36.3—
EchelonGraph scoreMEDIUM confidence

Score 6.3 from GitHub Security Advisory (severity: LOW) published 2026-06-29. a secondary CVSS source baseline 6.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
6.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 2%CVSS: 6.3Exploit: Elevated riskExposed: 0

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

A vulnerability was determined in Wavlink WL-NU516U1-A M16U1_V240425. The affected element is the function sub_401D68 of the file /cgi-bin/wireless.cgi of the component POST Parameter Handler. This manipulation of the argument SSID2G2/SSID5G2/AuthMethod2/WPAPSK12 causes command injection. Remote exploitation of the attack is possible. The exploit has been publicly disclosed and may be utilized. The affected component should be upgraded. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.

CVSS v3
6.3
EG Score
6.3(medium)
EG Risk
59(Attend)
EG Risk 59/100SSVC: Attend

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
Severity63% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
2%
EPSS %ILE
82%
KEV
Not listed

Published

June 29, 2026

Last Modified

June 29, 2026

Advisory Details (2)

Auto-updated Jun 29, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

Wavlink_vul/wavlink-wl-nu516u1-wireless-multissid-ssid5g2-command-injection at main · Svigo-o/Wavlink_vul · GitHub

https://github.com/Svigo-o/Wavlink_vul/tree/main/wavlink-wl-nu516u1-wireless-multissid-ssid5g2-command-injection
generic🟡 PoC Available

Wavlink_vul/wavlink-wl-nu516u1-wireless-multissid-ssid2g2-command-injection at main · Svigo-o/Wavlink_vul · GitHub

https://github.com/Svigo-o/Wavlink_vul/tree/main/wavlink-wl-nu516u1-wireless-multissid-ssid2g2-command-injection

Vendor Advisories for CVE-2026-13538(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 5× in last 7d / 35× 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 163 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-13538?
CVE-2026-13538 is a medium vulnerability published on June 29, 2026. A vulnerability was determined in Wavlink WL-NU516U1-A M16U1V240425. The affected element is the function sub401D68 of the file /cgi-bin/wireless.cgi of the component POST Parameter Handler. This manipulation of the argument SSID2G2/SSID5G2/AuthMethod2/WPAPSK12 causes command injection. Remote…
When was CVE-2026-13538 disclosed?
CVE-2026-13538 was first published in the National Vulnerability Database on June 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-13538 actively exploited?
CVE-2026-13538 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2% probability of exploitation in the next 30 days, which ranks it in the top 18.5% of all scored CVEs.
What is the CVSS score of CVE-2026-13538?
CVE-2026-13538 has a CVSS v3 base score of 6.3 (NVD).
How do I remediate CVE-2026-13538?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-13538, 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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