CVE-2026-76070

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

1.33% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 71.0% of scored records. A rank, not a probability.

NVD base score

9.3 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Deferred. NVD last modified this record on 2026-10-12.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-08-24 15:41Z2 MO AGO

Last updated

2026-08-24 18:28Z2 MO AGO

Reserved

2026-08-18

Assigning CNA

VulnCheck

Record state

PUBLISHED

Severity

Critical (CVSS 9.3)

CNA CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Weaknesses

• CWE-121Stack-based Buffer OverflowVariant

Data version

5.2

Document digest

354accc3e055813692b76dfbe2b8595f3989c8e93b48b3f715934c42384fba17

• ozcanpng.devResearcher Bloghttps://ozcanpng.dev/blog/cve-2026-76070-netis-nc63-login-stack-buffer-overflow/technical-descriptionexploit
• github.comResearcher GitHub Repohttps://github.com/ozcanpng/CVE-2026-76070technical-descriptionexploit
• www.netis-systems.comProduct Pagehttps://www.netis-systems.com/products/NC63.htmlproduct
• www.vulncheck.comhttps://www.vulncheck.com/advisories/netis-nc63-stack-buffer-overflow-via-login-password-parameterthird-party-advisory