A vulnerability was found in Wavlink WL-NU516U1 708c073-mt7628. (CVE-2026-18589)
A stack-based buffer overflow vulnerability exists in the change_password function of the nas.cgi file in Wavlink WL-NU516U1 708c073-mt7628. This vulnerability is triggered by manipulation of the User1Passwd argument and can be exploited remotely without authentication. The vendor has released a fixed version promptly after being notified. The vulnerability has a high severity score of 9.8 CVSS v3.1, indicating critical impact on confidentiality, integrity, and availability.
AI Analysis
Technical Summary
CVE-2026-18589 is a remote stack-based buffer overflow vulnerability in the change_password function of the nas.cgi file on Wavlink WL-NU516U1 708c073-mt7628 devices. The flaw arises from improper handling of the User1Passwd argument, allowing an attacker to overflow the stack remotely without any privileges or user interaction. This vulnerability is classified under CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer). The vendor was contacted early and has released a fixed version of the affected product, mitigating the issue.
Potential Impact
Successful exploitation of this vulnerability allows an unauthenticated remote attacker to execute arbitrary code on the affected device, potentially leading to full compromise including complete loss of confidentiality, integrity, and availability of the device.
Mitigation Recommendations
A fixed version of the affected product has been released by the vendor. Users should upgrade to the fixed version as soon as possible to remediate this vulnerability. Patch status is confirmed by vendor response and fix release. No additional mitigation steps are indicated.
A vulnerability was found in Wavlink WL-NU516U1 708c073-mt7628. (CVE-2026-18589)
Description
A stack-based buffer overflow vulnerability exists in the change_password function of the nas.cgi file in Wavlink WL-NU516U1 708c073-mt7628. This vulnerability is triggered by manipulation of the User1Passwd argument and can be exploited remotely without authentication. The vendor has released a fixed version promptly after being notified. The vulnerability has a high severity score of 9.8 CVSS v3.1, indicating critical impact on confidentiality, integrity, and availability.
CVSS v3.1
Score 9.8critical
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-18589 is a remote stack-based buffer overflow vulnerability in the change_password function of the nas.cgi file on Wavlink WL-NU516U1 708c073-mt7628 devices. The flaw arises from improper handling of the User1Passwd argument, allowing an attacker to overflow the stack remotely without any privileges or user interaction. This vulnerability is classified under CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer). The vendor was contacted early and has released a fixed version of the affected product, mitigating the issue.
Potential Impact
Successful exploitation of this vulnerability allows an unauthenticated remote attacker to execute arbitrary code on the affected device, potentially leading to full compromise including complete loss of confidentiality, integrity, and availability of the device.
Mitigation Recommendations
A fixed version of the affected product has been released by the vendor. Users should upgrade to the fixed version as soon as possible to remediate this vulnerability. Patch status is confirmed by vendor response and fix release. No additional mitigation steps are indicated.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-jfmw-hm93-c7jh
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-18589"]
- Ecosystems
- []
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
Threat ID: 6a71067cbf32cb7a34396b1f
Added to database: 08/03/2026, 21:22:04 UTC
Last enriched: 08/03/2026, 21:39:05 UTC
Last updated: 08/04/2026, 03:17:46 UTC
Views: 4
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