CVE-2026-26736Public exploit

Code execution via unbounded static_ipv6 copy

Published Feb 17, 2026 · Updated Feb 17, 2026

Stack-based buffer overflow in TOTOLINK A3002RU_V3 3.0.0-B20220304.1804 allows remote attackers to execute code or crash the router. formIpv6Setup passes the static_ipv6 request parameter directly to strcpy without a length bound, overflowing a stack buffer. CISA assesses adjacent, unauthenticated reachability, while the public PoC describes an authenticated request; impact is router compromise or a service crash.

CVSS severity8.8
High
EPSS probability0.51%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in TOTOLINK A3002RU_V3 3.0.0-B20220304.1804 allows remote attackers to execute code or crash the router. formIpv6Setup passes the static_ipv6 request parameter directly to strcpy without a length bound, overflowing a stack buffer. CISA assesses adjacent, unauthenticated reachability, while the public PoC describes an authenticated request; impact is router compromise or a service crash.

The record

CVE
CVE-2026-26736
Published
Feb 17, 2026
Updated
Feb 17, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, CWE-121, T1210
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 17, 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 vectoradjacent
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.8NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.8CISA-ADPCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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 exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
CWE-121Stack-based Buffer Overflow
T1210Exploitation of Remote Services

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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