CVE-2026-0918

Unauthenticated service crashes via oversized Content-Length

Published Jan 27, 2026 · Updated Jan 27, 2026

NULL pointer dereference in the HTTP service of TP-Link Tapo C100 v5, C220 v1, and C520WS v2 allows remote attackers to crash it. An oversized Content-Length in a POST request causes memory allocation to fail, after which the service dereferences the resulting NULL pointer. Exploitation requires same-network access but no authentication; repeated requests cause automatic restarts and can keep the camera unavailable.

CVSS severity7.1
High
EPSS probability0.68%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in the HTTP service of TP-Link Tapo C100 v5, C220 v1, and C520WS v2 allows remote attackers to crash it. An oversized Content-Length in a POST request causes memory allocation to fail, after which the service dereferences the resulting NULL pointer. Exploitation requires same-network access but no authentication; repeated requests cause automatic restarts and can keep the camera unavailable.

The record

CVE
CVE-2026-0918
Published
Jan 27, 2026
Updated
Jan 27, 2026
Vendor
TP-Link Systems Inc.
Product
Tapo C520WS
Classifications
CWE-476, T1499
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 27, 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 <1.2.3 Build 251114

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

TP-Link Systems Inc. · Tapo C520WSversion=0 <1.2.3 Build 251114
TP-Link Systems Inc. · Tapo C220version=0 <1.4.2 Build 251112

Published CVSS scores

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
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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-476NULL Pointer Dereference
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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