CVE-2026-76864

MEDIUMPre-NVD 4.84.8—
EchelonGraph scoreHIGH confidence

Score 4.8 from GitHub Security Advisory published 2026-09-16. a secondary CVSS source baseline 4.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
4.8EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.8Exploit: None knownExposed: 0

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

NR255-V version 1.5.130703 fails to sanitize QoS rule names before they are parsed via eval() in qos_xianz_add_cgi, qos_xianz_show_cgi, qos_filter_add_cgi, and qos_filter_show_cgi handlers. An attacker can inject persistent script code through crafted QoS rule name input that executes when the stored data is later processed by the affected handlers.'

CVSS v3
4.8
EG Score
4.8(high)
EG Risk
22(Track)
EG Risk 22/100SSVC: 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
Severity48% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
15%
KEV
Not listed

Published

September 15, 2026

Last Modified

September 17, 2026

Advisory Details (2)

Auto-updated Sep 15, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic

Netcore NR255-V 1.5.130703 Stored Cross-Site Scripting via Unescaped QoS Rule Names | Advisories | VulnCheck

https://www.vulncheck.com/advisories/netcore-nr255-v-1.5.130703-stored-cross-site-scripting-via-unescaped-qos-rule-names
generic🟡 PoC Available

netcore-router-public-refs/2026.08.19-netcore-nr255v-qos-stored-xss.md at main · draw-ctf/netcore-router-public-refs · GitHub

https://github.com/draw-ctf/netcore-router-public-refs/blob/main/2026.08.19-netcore-nr255v-qos-stored-xss.md

Vendor Advisories for CVE-2026-76864(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 18× in last 7d / 28× 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. 2026-09-24 14:04 UTCEPSS rescore
  2. 2026-09-24 07:14 UTCEG score recompute
  3. 2026-09-24 07:14 UTCGHSA enrichment
  4. 2026-09-23 17:54 UTCEPSS rescore
  5. 2026-09-23 05:27 UTCEG score recompute
  6. 2026-09-23 05:27 UTCGHSA enrichment
  7. 2026-09-22 16:01 UTCEPSS rescore
  8. 2026-09-22 03:39 UTCEG score recompute
  9. 2026-09-22 03:39 UTCGHSA enrichment
  10. 2026-09-21 21:09 UTCEPSS rescore
  11. 2026-09-21 01:52 UTCEG score recompute
  12. 2026-09-21 01:52 UTCGHSA enrichment
  13. 2026-09-20 20:16 UTCEPSS rescore
  14. 2026-09-20 00:04 UTCEG score recompute
  15. 2026-09-20 00:04 UTCGHSA enrichment
  16. 2026-09-18 22:16 UTCEG score recompute
  17. 2026-09-18 22:16 UTCGHSA enrichment
  18. 2026-09-18 19:28 UTCEPSS rescore
  19. 2026-09-17 20:29 UTCEG score recompute
  20. 2026-09-17 20:29 UTCGHSA enrichment
  21. 2026-09-17 19:31 UTCEG score recompute
  22. 2026-09-17 19:31 UTCGHSA enrichment
  23. 2026-09-16 19:53 UTCEG score recompute
  24. 2026-09-16 19:53 UTCGHSA enrichment
  25. 2026-09-16 14:08 UTCEPSS rescore
Show 3 more
  1. 2026-09-15 22:19 UTCEG score recompute
  2. 2026-09-15 22:04 UTCEG score recompute
  3. 2026-09-15 22:02 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-76864?
CVE-2026-76864 is a medium vulnerability published on September 15, 2026. NR255-V version 1.5.130703 fails to sanitize QoS rule names before they are parsed via eval() in qosxianzaddcgi, qosxianzshowcgi, qosfilteraddcgi, and qosfiltershowcgi handlers. An attacker can inject persistent script code through crafted QoS rule name input that executes when the stored data is…
When was CVE-2026-76864 disclosed?
CVE-2026-76864 was first published in the National Vulnerability Database on September 15, 2026, with the most recent update on September 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-76864 actively exploited?
CVE-2026-76864 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 85.2% of all scored CVEs.
What is the CVSS score of CVE-2026-76864?
CVE-2026-76864 has a CVSS v3 base score of 4.8 (NVD).
How do I remediate CVE-2026-76864?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-76864, 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-2026-76864

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