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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

CVEVulnerabilityProductAtomicorp findingObserved rules
CVE-2021-20038SonicWall SMA100 Stack - Buffer Overflow/Remote Code Executionsma 200 firmwareAttack Blocked by Atomicorp340193
CVE-2026-76070Netis NC63 V3.0.0.3327 Stack Buffer Overflow via Login Password ParameterNC63Attack Blocked by Atomicorp340014 , 340029 , 344360 , 344361 , 344363 , 344364 , 344366 , 344370 , 393655
CVE-2026-76071Netis NC63 V3.0.0.3327 Stack Buffer Overflow via destHost ParameterNC63Attack Blocked by Atomicorp340014 , 340023 , 340029 , 344360 , 344361 , 344363 , 344364 , 344366 , 344370 , 393655
CVE-2026-36783Shenzhen Tenda Technology Co., Ltd Tenda O3 Wireless Router v1.0.0.5(4180) was discovered to Denial of Service Vulnerability-Attack Blocked by Atomicorp340014 , 340023 , 340029 , 340193 , 344360 , 344361 , 344363 , 344364 , 344366 , 344370 , 347009 , 393655

Associated Atomicorp WAF Rules

RuleStatusBehavior
340014Activedisruptive (deny)
340023Activedisruptive (deny)
340029Activedisruptive (deny)
340193Activedisruptive (deny)
344360Activedisruptive (deny)
344361Activedisruptive (deny)
344363Activedisruptive (deny)
344364Activedisruptive (deny)
344366Activedisruptive (deny)
344370Activedisruptive (deny)
347009Activedisruptive (deny)
393655Activedisruptive (deny)