Totolink TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327 Network Configuration formIpv6Setup static_dns2 buffer overflow

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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9.1$0-$5k1.94-

Summaryinfo

A vulnerability identified as very critical has been detected in Totolink TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327. This affects the function formIpv6Setup of the component Network Configuration. This manipulation of the argument static_dns2 causes buffer overflow. The identification of this vulnerability is CVE-2026-42022. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in Totolink TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327. It has been declared as very critical. Affected by this vulnerability is the function formIpv6Setup of the component Network Configuration. The manipulation of the argument static_dns2 with an unknown input leads to a buffer overflow vulnerability. The CWE definition for the vulnerability is CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Multiple stack-based buffer overflow vulnerabilities exist in the boa formIpv6Setup static network configuration functionality of Totolink X2000R TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327. A specially crafted HTTP request can lead to arbitrary code execution. An attacker can make an authenticated HTTP request to trigger these vulnerabilities. This vulnerability concerns the static_dns2 parameter.

The advisory is shared at talosintelligence.com. This vulnerability is known as CVE-2026-42022 since 04/23/2026. The exploitation appears to be easy. The attack can be launched remotely. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/21/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.1
VulDB Meta Temp Score: 9.1

VulDB Base Score: 9.1
VulDB Temp Score: 9.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 9.1
CNA Vector (talos): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Buffer overflow
CWE: CWE-120 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

04/23/2026 CVE reserved
10/21/2026 +181 days Advisory disclosed
10/21/2026 +0 days VulDB entry created
10/21/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: talosintelligence.com
Status: Not defined

CVE: CVE-2026-42022 (🔒)
GCVE (CVE): GCVE-0-2026-42022
GCVE (VulDB): GCVE-100-424069

Entryinfo

Created: 10/21/2026 05:27
Changes: 10/21/2026 05:27 (62)
Complete: 🔍
Cache ID: 216::103

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