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CWE-121: Stack-based Buffer Overflow
Weakness Summary
A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
- Canonical source: MITRE CWE-121 (opens in a new tab)
- Published Atomicorp CVE observations: 4
- Distinct affected products in those observations: 2
- Active Atomicorp rules associated with this weakness: 12
Atomicorp Research Context
Atomicorp has published CVE-specific research observations associated with this weakness category. Each linked CVE page states whether the tested request was detected or blocked and is the authoritative customer-facing finding.
The CVEs and rules shown here are selected published examples, not a complete list of Atomicorp protections. If a CWE, CVE, or rule is absent from this page, no conclusion should be drawn about whether Atomicorp protects against that weakness or attack method.
A CWE describes a class of software weakness. It does not identify one exploit request, and association with a CWE does not mean that every vulnerability or exploitation path in that category is detected or blocked.
Selected Published CVE Observations
| CVE | Vulnerability | Product | Atomicorp finding | Observed rules |
|---|---|---|---|---|
| CVE-2021-20038 | SonicWall SMA100 Stack - Buffer Overflow/Remote Code Execution | sma 200 firmware | Attack Blocked by Atomicorp | 340193 |
| CVE-2026-76070 | Netis NC63 V3.0.0.3327 Stack Buffer Overflow via Login Password Parameter | NC63 | Attack Blocked by Atomicorp | 340014 , 340029 , 344360 , 344361 , 344363 , 344364 , 344366 , 344370 , 393655 |
| CVE-2026-76071 | Netis NC63 V3.0.0.3327 Stack Buffer Overflow via destHost Parameter | NC63 | Attack Blocked by Atomicorp | 340014 , 340023 , 340029 , 344360 , 344361 , 344363 , 344364 , 344366 , 344370 , 393655 |
| CVE-2026-36783 | Shenzhen Tenda Technology Co., Ltd Tenda O3 Wireless Router v1.0.0.5(4180) was discovered to Denial of Service Vulnerability | - | Attack Blocked by Atomicorp | 340014 , 340023 , 340029 , 340193 , 344360 , 344361 , 344363 , 344364 , 344366 , 344370 , 347009 , 393655 |
Associated Atomicorp WAF Rules
| Rule | Status | Behavior |
|---|---|---|
| 340014 | Active | disruptive (deny) |
| 340023 | Active | disruptive (deny) |
| 340029 | Active | disruptive (deny) |
| 340193 | Active | disruptive (deny) |
| 344360 | Active | disruptive (deny) |
| 344361 | Active | disruptive (deny) |
| 344363 | Active | disruptive (deny) |
| 344364 | Active | disruptive (deny) |
| 344366 | Active | disruptive (deny) |
| 344370 | Active | disruptive (deny) |
| 347009 | Active | disruptive (deny) |
| 393655 | Active | disruptive (deny) |