CVE-2026-16538

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreHIGH confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-12. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this weekElevated
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.1Exploit: Elevated riskExposed: 0

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

The Wallet for WooCommerce WordPress plugin before 1.6.10 does not verify the amount actually collected for a wallet top-up before crediting the wallet, allowing customers to top up their wallet balance for less than its value.

CVSS v3
9.1
EG Score
9.1(high)
EG Risk
72(Attend)
EG Risk 72/100SSVC: 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
Severity91% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
14%
KEV
Not listed

Published

August 12, 2026

Last Modified

August 12, 2026

Advisory Details (1)

Auto-updated Aug 12, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

TeraWallet – Wallet for WooCommerce < 1.6.10 – Subscriber+ Wallet Balance Inflation via Discounted Top-Up | CVE 2026-16538 | Plugin Vulnerabilities

https://wpscan.com/vulnerability/bc87bb91-a0c4-4d35-8be1-6d3ec2623a86/

Vendor Advisories for CVE-2026-16538(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 58× in last 7d / 80× 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. 2026-08-21 06:25 UTCGHSA enrichment
  2. 2026-08-21 02:39 UTCEG score recompute
  3. 2026-08-21 02:39 UTCGHSA enrichment
  4. 2026-08-20 22:55 UTCEPSS rescore
  5. 2026-08-20 22:52 UTCGHSA enrichment
  6. 2026-08-20 19:06 UTCGHSA enrichment
  7. 2026-08-20 15:20 UTCGHSA enrichment
  8. 2026-08-20 11:34 UTCGHSA enrichment
  9. 2026-08-20 07:47 UTCGHSA enrichment
  10. 2026-08-20 04:01 UTCGHSA enrichment
  11. 2026-08-20 00:14 UTCGHSA enrichment
  12. 2026-08-19 20:28 UTCEG score recompute
  13. 2026-08-19 20:28 UTCGHSA enrichment
  14. 2026-08-19 17:03 UTCEPSS rescore
  15. 2026-08-19 16:41 UTCGHSA enrichment
  16. 2026-08-19 12:52 UTCGHSA enrichment
  17. 2026-08-19 09:06 UTCGHSA enrichment
  18. 2026-08-19 05:19 UTCGHSA enrichment
  19. 2026-08-19 01:25 UTCGHSA enrichment
  20. 2026-08-18 21:39 UTCGHSA enrichment
  21. 2026-08-18 17:22 UTCEG score recompute
  22. 2026-08-18 17:22 UTCGHSA enrichment
  23. 2026-08-18 13:48 UTCEPSS rescore
  24. 2026-08-18 12:45 UTCGHSA enrichment
  25. 2026-08-18 08:35 UTCGHSA enrichment
Show 55 more
  1. 2026-08-18 04:48 UTCGHSA enrichment
  2. 2026-08-18 01:02 UTCGHSA enrichment
  3. 2026-08-17 21:15 UTCGHSA enrichment
  4. 2026-08-17 17:29 UTCEG score recompute
  5. 2026-08-17 17:29 UTCGHSA enrichment
  6. 2026-08-17 13:47 UTCEPSS rescore
  7. 2026-08-17 13:39 UTCGHSA enrichment
  8. 2026-08-17 09:53 UTCGHSA enrichment
  9. 2026-08-17 06:07 UTCGHSA enrichment
  10. 2026-08-17 02:21 UTCGHSA enrichment
  11. 2026-08-16 22:35 UTCGHSA enrichment
  12. 2026-08-16 18:49 UTCGHSA enrichment
  13. 2026-08-16 14:59 UTCEG score recompute
  14. 2026-08-16 14:59 UTCGHSA enrichment
  15. 2026-08-16 14:56 UTCEPSS rescore
  16. 2026-08-16 11:12 UTCGHSA enrichment
  17. 2026-08-16 07:26 UTCGHSA enrichment
  18. 2026-08-16 03:40 UTCEG score recompute
  19. 2026-08-16 03:40 UTCGHSA enrichment
  20. 2026-08-16 02:14 UTCEPSS rescore
  21. 2026-08-15 23:54 UTCGHSA enrichment
  22. 2026-08-15 20:08 UTCGHSA enrichment
  23. 2026-08-15 16:22 UTCGHSA enrichment
  24. 2026-08-15 12:36 UTCGHSA enrichment
  25. 2026-08-15 08:50 UTCGHSA enrichment
  26. 2026-08-15 05:04 UTCEG score recompute
  27. 2026-08-15 05:04 UTCGHSA enrichment
  28. 2026-08-15 01:30 UTCEPSS rescore
  29. 2026-08-15 01:17 UTCGHSA enrichment
  30. 2026-08-14 21:31 UTCGHSA enrichment
  31. 2026-08-14 17:45 UTCGHSA enrichment
  32. 2026-08-14 13:47 UTCGHSA enrichment
  33. 2026-08-14 10:01 UTCGHSA enrichment
  34. 2026-08-14 06:15 UTCGHSA enrichment
  35. 2026-08-14 02:29 UTCGHSA enrichment
  36. 2026-08-13 22:43 UTCEG score recompute
  37. 2026-08-13 22:43 UTCGHSA enrichment
  38. 2026-08-13 22:00 UTCEPSS rescore
  39. 2026-08-13 18:57 UTCGHSA enrichment
  40. 2026-08-13 15:11 UTCGHSA enrichment
  41. 2026-08-13 11:25 UTCGHSA enrichment
  42. 2026-08-13 07:39 UTCGHSA enrichment
  43. 2026-08-13 03:53 UTCGHSA enrichment
  44. 2026-08-13 00:07 UTCEG score recompute
  45. 2026-08-13 00:07 UTCGHSA enrichment
  46. 2026-08-12 20:21 UTCEG score recompute
  47. 2026-08-12 20:21 UTCGHSA enrichment
  48. 2026-08-12 19:46 UTCEG score recompute▲ 9.10
  49. 2026-08-12 19:46 UTCGHSA enrichment
  50. 2026-08-12 19:45 UTCMITRE cvelistV5CVSS v3 → 9.1 · severity → CRITICAL
  51. 2026-08-12 13:50 UTCEPSS rescore
  52. 2026-08-12 06:31 UTCGHSA enrichment
  53. 2026-08-12 06:30 UTCNVD update
  54. 2026-08-12 06:06 UTCEG score recompute
  55. 2026-08-12 06:03 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-16538?
CVE-2026-16538 is a critical vulnerability published on August 12, 2026. The Wallet for WooCommerce WordPress plugin before 1.6.10 does not verify the amount actually collected for a wallet top-up before crediting the wallet, allowing customers to top up their wallet balance for less than its value.
When was CVE-2026-16538 disclosed?
CVE-2026-16538 was first published in the National Vulnerability Database on August 12, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-16538 actively exploited?
CVE-2026-16538 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 85.6% of all scored CVEs.
What is the CVSS score of CVE-2026-16538?
CVE-2026-16538 has a CVSS v3.1 base score of 9.1 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-16538?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-16538, 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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