CVE-2026-34119

Device-process crash via segmented HTTP body overflow

Published Apr 2, 2026 · Updated Apr 2, 2026

Heap-based buffer overflow in the HTTP parsing loop in TP-Link Tapo C520WS v2.6 allows remote attackers to crash the device process. The parser accepts a user-controlled content length and repeatedly appends segmented request-body data without rechecking the allocated buffer's remaining capacity. Unauthenticated access from the same network segment is sufficient; the documented consequence is a process crash or unresponsive camera, with no vendor-reported data exposure or modification.

CVSS severity7.1
High
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer overflow in the HTTP parsing loop in TP-Link Tapo C520WS v2.6 allows remote attackers to crash the device process. The parser accepts a user-controlled content length and repeatedly appends segmented request-body data without rechecking the allocated buffer's remaining capacity. Unauthenticated access from the same network segment is sufficient; the documented consequence is a process crash or unresponsive camera, with no vendor-reported data exposure or modification.

The record

CVE
CVE-2026-34119
Published
Apr 2, 2026
Updated
Apr 2, 2026
Vendor
TP-Link Systems Inc.
Product
Tapo C520WS
Classifications
CWE-122, CAPEC-100, T1499
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 2, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <1.2.4 Build 260326 Rel.24666n

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

TP-Link Systems Inc. · Tapo C520WSversion=0 <1.2.4 Build 260326 Rel.24666n

Published CVSS scores

6.5NVDCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.1TP-Link Systems Inc.CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
CAPEC-100Overflow Buffers
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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