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: 1%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
1%
EPSS %ILE
68%
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 16× in last 7d / 60× 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. 2026-07-30 16:27 UTCEPSS rescore
  2. 2026-07-30 01:30 UTCEPSS rescore
  3. 2026-07-29 23:42 UTCEG score recompute
  4. 2026-07-29 23:41 UTCGHSA enrichment
  5. 2026-07-28 19:54 UTCEG score recompute
  6. 2026-07-28 19:54 UTCGHSA enrichment
  7. 2026-07-28 15:36 UTCEPSS rescore
  8. 2026-07-27 16:58 UTCEG score recompute
  9. 2026-07-27 16:58 UTCGHSA enrichment
  10. 2026-07-27 14:13 UTCEPSS rescore
  11. 2026-07-26 14:54 UTCEPSS rescore
  12. 2026-07-26 14:54 UTCEPSS rescore
  13. 2026-07-26 14:22 UTCEG score recompute
  14. 2026-07-26 14:22 UTCGHSA enrichment
  15. 2026-07-25 14:17 UTCEPSS rescore
  16. 2026-07-24 14:17 UTCEPSS rescore
  17. 2026-07-23 14:18 UTCEPSS rescore
  18. 2026-07-23 03:05 UTCEG score recompute
  19. 2026-07-22 14:08 UTCEPSS rescore
  20. 2026-07-21 15:24 UTCEPSS rescore
  21. 2026-07-20 17:08 UTCEPSS rescore
  22. 2026-07-19 14:30 UTCEPSS rescore
  23. 2026-07-19 02:28 UTCEPSS rescore
  24. 2026-07-18 10:04 UTCEPSS rescore
  25. 2026-07-17 04:00 UTCGHSA enrichment
Show 42 more
  1. 2026-07-16 17:02 UTCEPSS rescore
  2. 2026-07-16 04:07 UTCGHSA enrichment
  3. 2026-07-15 16:57 UTCEPSS rescore
  4. 2026-07-15 04:13 UTCGHSA enrichment
  5. 2026-07-15 02:00 UTCEPSS rescore
  6. 2026-07-14 04:11 UTCGHSA enrichment
  7. 2026-07-13 22:30 UTCEPSS rescore
  8. 2026-07-13 06:12 UTCEPSS rescore
  9. 2026-07-13 04:17 UTCGHSA enrichment
  10. 2026-07-12 05:46 UTCEPSS rescore
  11. 2026-07-12 04:23 UTCGHSA enrichment
  12. 2026-07-11 08:27 UTCEPSS rescore
  13. 2026-07-11 04:30 UTCGHSA enrichment
  14. 2026-07-10 04:35 UTCGHSA enrichment
  15. 2026-07-09 19:10 UTCEPSS rescore
  16. 2026-07-09 04:35 UTCGHSA enrichment
  17. 2026-07-08 15:15 UTCEPSS rescore
  18. 2026-07-08 15:15 UTCEPSS rescore
  19. 2026-07-08 04:42 UTCGHSA enrichment
  20. 2026-07-07 13:46 UTCEPSS rescore
  21. 2026-07-07 04:45 UTCGHSA enrichment
  22. 2026-07-06 16:27 UTCEPSS rescore
  23. 2026-07-06 04:51 UTCGHSA enrichment
  24. 2026-07-06 02:23 UTCEPSS rescore
  25. 2026-07-05 04:47 UTCGHSA enrichment
  26. 2026-07-05 02:30 UTCEPSS rescore
  27. 2026-07-05 02:30 UTCEPSS rescore
  28. 2026-07-04 06:31 UTCEPSS rescore
  29. 2026-07-04 04:50 UTCGHSA enrichment
  30. 2026-07-03 04:56 UTCGHSA enrichment
  31. 2026-07-02 05:01 UTCGHSA enrichment
  32. 2026-07-01 15:06 UTCEPSS rescore
  33. 2026-07-01 15:06 UTCEPSS rescore
  34. 2026-07-01 05:08 UTCGHSA enrichment
  35. 2026-06-30 23:22 UTCEPSS rescore
  36. 2026-06-30 05:14 UTCGHSA enrichment
  37. 2026-06-29 15:26 UTCNVD updateCVSS v4 → 2.1
  38. 2026-06-29 14:52 UTCMITRE cvelistV5CVSS v4 → 5.3
  39. 2026-06-29 14:06 UTCEPSS rescore
  40. 2026-06-29 08:04 UTCNVD updateCVSS v4 → 2.1
  41. 2026-06-29 05:19 UTCEG score recompute
  42. 2026-06-29 05:17 UTCMITRE cvelistV5first tracked

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 1% probability of exploitation in the next 30 days, which ranks it in the top 32.3% 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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