Wavlink AC3000 M33A8.V5030.210505 qos.cgi qos_settings sel_mode buffer overflow

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.8$0-$5k0.00

Summaryinfo

A vulnerability classified as critical was found in Wavlink AC3000 M33A8.V5030.210505. The impacted element is the function qos_settings of the file qos.cgi. The manipulation of the argument sel_mode results in buffer overflow. This vulnerability is identified as CVE-2024-39803. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in Wavlink AC3000 M33A8.V5030.210505. It has been classified as critical. Affected is the function qos_settings of the file qos.cgi. The manipulation of the argument sel_mode with an unknown input leads to a buffer overflow vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Multiple buffer overflow vulnerabilities exist in the qos.cgi qos_settings() functionality of Wavlink AC3000 M33A8.V5030.210505. A specially crafted HTTP request can lead to stack-based buffer overflow. An attacker can make an authenticated HTTP request to trigger these vulnerabilities.A buffer overflow vulnerability exists in the `sel_mode` POST parameter.

The advisory is available at talosintelligence.com. This vulnerability is traded as CVE-2024-39803 since 06/28/2024. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation needs additional levels of successful authentication. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 08/22/2025).

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

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.8
VulDB Meta Temp Score: 7.8

VulDB Base Score: 7.2
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.2
NVD Vector: 🔍

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

EPSS Score: 🔍
EPSS Percentile: 🔍

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

06/28/2024 🔍
01/14/2025 +200 days 🔍
01/14/2025 +0 days 🔍
08/22/2025 +220 days 🔍

Sourcesinfo

Advisory: TALOS-2024-2049
Status: Not defined

CVE: CVE-2024-39803 (🔍)
GCVE (CVE): GCVE-0-2024-39803
GCVE (VulDB): GCVE-100-291606

Entryinfo

Created: 01/14/2025 16:07
Updated: 08/22/2025 05:00
Changes: 01/14/2025 16:07 (65), 08/22/2025 05:00 (12)
Complete: 🔍
Cache ID: 216::103

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