Netis NC63 V3.0.0.3327 Stack Buffer Overflow via Login Password Parameter (CVE-2026-76070) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-76070

Netis NC63 V3.0.0.3327 Stack Buffer Overflow via Login Password Parameter

Answer in brief

CVE-2026-76070 records a Unknown severity vulnerability in Netis NC63 V3.0.0.3327 Stack Buffer Overflow via Login Password Parameter. The current sources do not mark it as known exploited. The current feed maps Netis Systems/NC63 (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 24, 2026Updated Aug 24, 2026Source checked Aug 24, 2026First seen by HOL Aug 24, 2026Material review Aug 24, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Netis Systems/NC63 (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Netis Systems/NC63generic	0	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Netis Systems/NC63.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Aug 24, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 24, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 24, 2026

Sources and claim methodology

Upstream source description

Netis NC63 firmware through V3.0.0.3327 contains a stack-based buffer overflow vulnerability that allows unauthenticated remote attackers to overwrite saved stack state by submitting an oversized Base64-encoded password to the login handler in /bin/netis.cgi. Attackers can exploit the custom Base64 decoder's lack of output length validation against the fixed-size stack buffer to achieve remote code execution with root privileges, as the Boa web server executes the CGI environment as root.

Quoted source text, attributed separately from HOL analysis.