Arista Access Points up to 21.2.x/21.3.0M-13/22.0.1F-32 Wireless Gateway Service stack-based overflow

Summaryinfo

A vulnerability, which was classified as very critical, has been found in Arista Access Points up to 21.2.x/21.3.0M-13/22.0.1F-32. This vulnerability affects unknown code of the component Wireless Gateway Service. The manipulation leads to stack-based overflow. This vulnerability is uniquely identified as CVE-2026-102162. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in Arista Access Points up to 21.2.x/21.3.0M-13/22.0.1F-32 and classified as very critical. This issue affects an unknown functionality of the component Wireless Gateway Service. The manipulation with an unknown input leads to a stack-based overflow vulnerability. Using CWE to declare the problem leads to 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). Impacted is confidentiality, integrity, and availability. The summary by CVE is:

On affected Arista Wi-Fi access points with captive portal, or application firewall enabled on at least one SSID, a vulnerability in the wireless gateway service could allow an unauthenticated network-adjacent attacker to send a crafted packet that triggers a stack overflow, resulting in a denial-of-service condition or potentially execute arbitrary code on the device. The wireless gateway service is automatically restarted after a crash, allowing repeated exploitation attempts.

It is possible to read the advisory at arista.com. The identification of this vulnerability is CVE-2026-102162 since 09/28/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/06/2026).

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

Vendor

• Arista

Name

• Access Points

Version

• 21.0
• 21.1
• 21.2
• 21.3.0M-13
• 22.0.1F-32

License

• commercial

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