FKIE_CVE-2026-34118
Vulnerability from fkie_nvd - Published: 2026-04-02 18:16 - Updated: 2026-04-06 20:26
Severity ?
Summary
A heap-based buffer overflow vulnerability was identified in TP-Link Tapo C520WS v2.6 in the HTTP POST body parsing logic due to missing validation of remaining buffer capacity after dynamic allocation, due to insufficient boundary validation when handling externally supplied HTTP input. An attacker
on the same network segment could trigger heap memory corruption conditions by
sending crafted payloads that cause write operations beyond allocated buffer
boundaries. Successful exploitation
causes a Denial-of-Service (DoS) condition, causing the device’s process to
crash or become unresponsive.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| tp-link | tapo_c520ws_firmware | * | |
| tp-link | tapo_c520ws | 2.6 |
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"criteria": "cpe:2.3:o:tp-link:tapo_c520ws_firmware:*:*:*:*:*:*:*:*",
"matchCriteriaId": "710DD89A-E94F-4371-A03F-698C2F61D9C1",
"versionEndExcluding": "1.2.4",
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"value": "A heap-based buffer overflow vulnerability was identified in TP-Link Tapo C520WS v2.6\u00a0in the HTTP POST body parsing logic due to missing validation of remaining buffer capacity after dynamic allocation, due to\u00a0insufficient boundary validation when handling externally supplied HTTP input.\u00a0\u00a0An attacker\non the same network segment could trigger heap memory corruption conditions by\nsending crafted payloads that cause write operations beyond allocated buffer\nboundaries.\u00a0 Successful exploitation\ncauses a Denial-of-Service (DoS) condition, causing the device\u2019s process to\ncrash or become unresponsive."
}
],
"id": "CVE-2026-34118",
"lastModified": "2026-04-06T20:26:55.677",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "ADJACENT_NETWORK",
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"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
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"source": "nvd@nist.gov",
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"exploitMaturity": "NOT_DEFINED",
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"modifiedAttackComplexity": "NOT_DEFINED",
"modifiedAttackRequirements": "NOT_DEFINED",
"modifiedAttackVector": "NOT_DEFINED",
"modifiedPrivilegesRequired": "NOT_DEFINED",
"modifiedSubAvailabilityImpact": "NOT_DEFINED",
"modifiedSubConfidentialityImpact": "NOT_DEFINED",
"modifiedSubIntegrityImpact": "NOT_DEFINED",
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"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
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"published": "2026-04-02T18:16:28.503",
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"tags": [
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"url": "https://www.tp-link.com/en/support/download/tapo-c520ws/#Firmware-Release-Notes"
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"vulnStatus": "Analyzed",
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}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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