CVE-2026-36837Public exploitNetwork attack vector

Service crash via unchecked hostname copy

Published Apr 29, 2026 · Updated Apr 29, 2026

Stack overflow in TOTOLINK A3002RU V3 3.0.0-B20220304.1804 and earlier allows remote authenticated users to crash the boa service. The formMapDelDevice handler passes the untrusted hostname parameter directly to strcpy without checking the destination stack buffer's capacity. A crafted authenticated management request overwrites stack memory, interrupting the router's management service and potentially the device.

CVSS severity7.5
High
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

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Summary

What happened

Stack overflow in TOTOLINK A3002RU V3 3.0.0-B20220304.1804 and earlier allows remote authenticated users to crash the boa service. The formMapDelDevice handler passes the untrusted hostname parameter directly to strcpy without checking the destination stack buffer's capacity. A crafted authenticated management request overwrites stack memory, interrupting the router's management service and potentially the device.

The record

CVE
CVE-2026-36837
Published
Apr 29, 2026
Updated
Apr 29, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-121
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 29, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5National Vulnerability DatabaseCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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