CVE-2026-7287: CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') in Zyxel NWA1100-N firmware
CVE-2026-7287 is a high-severity buffer overflow vulnerability in Zyxel NWA1100-N firmware version 1.00(AACE.1)C0. It affects multiple functions within the device's 'webs' binary, allowing an attacker to cause a denial-of-service (DoS) by sending crafted HTTP requests. The vulnerability does not impact confidentiality or integrity but can disrupt availability by crashing the device. No official patch or remediation guidance is currently available from Zyxel. There are no known exploits in the wild at this time.
AI Analysis
Technical Summary
This vulnerability involves classic buffer overflow issues (CWE-120) in the formWep(), formWlAc(), formPasswordSetup(), formUpgradeCert(), and formDelcert() functions of the 'webs' binary in Zyxel NWA1100-N firmware version 1.00(AACE.1)C0. An attacker can trigger a denial-of-service condition by sending specially crafted HTTP requests that overflow buffers without proper input size checks. The CVSS 3.1 base score is 7.5, reflecting network attack vector, low attack complexity, no privileges or user interaction required, and impact limited to availability.
Potential Impact
Successful exploitation results in denial-of-service by crashing the device, impacting availability. There is no impact on confidentiality or integrity. The vulnerability can be triggered remotely over the network without authentication or user interaction.
Mitigation Recommendations
No official patch or remediation is currently available from Zyxel for this vulnerability. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is released, affected devices should be isolated from untrusted networks to reduce exposure to crafted HTTP requests targeting this vulnerability.
CVE-2026-7287: CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') in Zyxel NWA1100-N firmware
Description
CVE-2026-7287 is a high-severity buffer overflow vulnerability in Zyxel NWA1100-N firmware version 1.00(AACE.1)C0. It affects multiple functions within the device's 'webs' binary, allowing an attacker to cause a denial-of-service (DoS) by sending crafted HTTP requests. The vulnerability does not impact confidentiality or integrity but can disrupt availability by crashing the device. No official patch or remediation guidance is currently available from Zyxel. There are no known exploits in the wild at this time.
CVSS v3.1
Score 7.5high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves classic buffer overflow issues (CWE-120) in the formWep(), formWlAc(), formPasswordSetup(), formUpgradeCert(), and formDelcert() functions of the 'webs' binary in Zyxel NWA1100-N firmware version 1.00(AACE.1)C0. An attacker can trigger a denial-of-service condition by sending specially crafted HTTP requests that overflow buffers without proper input size checks. The CVSS 3.1 base score is 7.5, reflecting network attack vector, low attack complexity, no privileges or user interaction required, and impact limited to availability.
Potential Impact
Successful exploitation results in denial-of-service by crashing the device, impacting availability. There is no impact on confidentiality or integrity. The vulnerability can be triggered remotely over the network without authentication or user interaction.
Mitigation Recommendations
No official patch or remediation is currently available from Zyxel for this vulnerability. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is released, affected devices should be isolated from untrusted networks to reduce exposure to crafted HTTP requests targeting this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Zyxel
- Date Reserved
- 2026-04-28T09:40:36.000Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a02aae4cbff5d86109f4b56
Added to database: 05/12/2026, 04:21:56 UTC
Last enriched: 05/19/2026, 11:07:08 UTC
Last updated: 07/31/2026, 19:23:00 UTC
Views: 84
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