CVE-2026-76590

CRITICALPre-NVD 9.99.9—
EchelonGraph scoreHIGH confidence

Score 9.9 from GitHub Security Advisory (severity: HIGH) published 2026-08-20. a secondary CVSS source baseline 9.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 5 sources updated this week
9.9EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.9Exploit: None knownExposed: 0

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

A vulnerability was identified in TRENDnet TEW-755AP up to 20260702. Affected by this issue is some unknown functionality of the file /cgi-bin/wan.cgi of the component ssi. Such manipulation of the argument cameo.wan.wan_pppoe_password_00 leads to stack-based buffer overflow. The attack can be executed remotely. The exploit is publicly available and might be used.

CVSS v3
9.9
EG Score
9.9(high)
EG Risk
49(Track)
EG Risk 49/100SSVC: 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
Severity99% × 45%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
47%
KEV
Not listed

Published

August 19, 2026

Last Modified

August 20, 2026

Advisory Details (2)

Auto-updated Aug 20, 2026
No patch confirmed yet.
generic

CVE/team15_20260702/15_755ap-ssi-bof at main · meishigana/CVE · GitHub

https://github.com/meishigana/CVE/tree/main/team15_20260702/15_755ap-ssi-bof
generic

CVE/team15_20260702/15_755ap-ssi-bof/poc/poc-ssi-overflow.py at main · meishigana/CVE · GitHub

https://github.com/meishigana/CVE/blob/main/team15_20260702/15_755ap-ssi-bof/poc/poc-ssi-overflow.py

Vendor Advisories for CVE-2026-76590(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 15× in last 7d / 15× 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 04:19 UTCGHSA enrichment
  2. 2026-08-21 00:28 UTCEG score recompute
  3. 2026-08-21 00:28 UTCGHSA enrichment
  4. 2026-08-20 22:56 UTCEPSS rescore
  5. 2026-08-20 20:38 UTCGHSA enrichment
  6. 2026-08-20 16:46 UTCGHSA enrichment
  7. 2026-08-20 12:50 UTCGHSA enrichment
  8. 2026-08-20 09:51 UTCGHSA enrichment
  9. 2026-08-20 06:01 UTCGHSA enrichment
  10. 2026-08-20 02:11 UTCEG score recompute
  11. 2026-08-20 02:11 UTCGHSA enrichment
  12. 2026-08-19 22:20 UTCEG score recompute
  13. 2026-08-19 22:19 UTCNVD updateCVSS v4 → 8.6
  14. 2026-08-19 21:48 UTCEG score recompute
  15. 2026-08-19 21:47 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-76590?
CVE-2026-76590 is a critical vulnerability published on August 19, 2026. A vulnerability was identified in TRENDnet TEW-755AP up to 20260702. Affected by this issue is some unknown functionality of the file /cgi-bin/wan.cgi of the component ssi. Such manipulation of the argument cameo.wan.wanpppoepassword_00 leads to stack-based buffer overflow. The attack can be…
When was CVE-2026-76590 disclosed?
CVE-2026-76590 was first published in the National Vulnerability Database on August 19, 2026, with the most recent update on August 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-76590 actively exploited?
CVE-2026-76590 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 53.2% of all scored CVEs.
What is the CVSS score of CVE-2026-76590?
CVE-2026-76590 has a CVSS v3 base score of 9.9 (NVD).
How do I remediate CVE-2026-76590?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-76590, 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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