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
81%
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 8× in last 7d / 70× 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 139 total refreshes for this CVE.

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

Related CVEs(same CWE)

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 19.1% 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

Explore the affected products and dependency analysis for CVE-2026-13538

Explore →

Is Your Infrastructure Affected by CVE-2026-13538?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs