Wavlink WL-NU516U1 708c073-mt7628 nas.cgi change_password User1Passwd stack-based overflow

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.8$0-$5k1.26+

Summaryinfo

A vulnerability marked as critical has been reported in Wavlink WL-NU516U1 708c073-mt7628. Affected is the function change_password of the file nas.cgi. This manipulation of the argument User1Passwd causes stack-based overflow. This vulnerability is tracked as CVE-2026-18589. The attack is possible to be carried out remotely. Moreover, an exploit is present. It is suggested to upgrade the affected component. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.

Detailsinfo

A vulnerability classified as critical was found in Wavlink WL-NU516U1 708c073-mt7628. Affected by this vulnerability is the function change_password of the file nas.cgi. The manipulation of the argument User1Passwd with an unknown input leads to a stack-based overflow vulnerability. The CWE definition for the vulnerability is CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). As an impact it is known to affect confidentiality, integrity, and availability.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-18589. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details and also a public exploit are known.

It is declared as proof-of-concept. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.

Upgrading eliminates this vulnerability. The upgrade is hosted for download at dl.wavlink.com.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.8
VulDB Meta Temp Score: 8.8

VulDB Base Score: 9.8
VulDB Temp Score: 8.8
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Stack-based overflow
CWE: CWE-121 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: dl.wavlink.com

Timelineinfo

08/02/2026 Advisory disclosed
08/02/2026 +0 days VulDB entry created
08/02/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-18589 (🔒)
GCVE (CVE): GCVE-0-2026-18589
GCVE (VulDB): GCVE-100-385417
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 08/02/2026 22:38
Changes: 08/02/2026 22:38 (59)
Complete: 🔍
Submitter: oduoke
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #850501: WAVLINK NU516U1 2026-05-15 (build 708c073-mt7628) Command Injection (by oduoke)

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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