CVE-2026-102162 PUBLISHED

Security Advisory 0193

Assigner: Arista
Reserved: 28.09.2026 Published: 06.10.2026 Updated: 06.10.2026

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.

CVSS Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS Score: 8.8

Attack Vector	Adjacent Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	None	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.1

CVSS Vector: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
CVSS Score: 9.4

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Adjacent	Confidentiality	High	Confidentiality	High
Attack Complexity	Low	Integrity	High	Integrity	High
Attack Requirements	None	Availability	High	Availability	High
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	Arista Networks
Product	Wi-Fi Access Points
Versions	Default: unaffected affected from 22.0.0 to 22.0.1F-32 (incl.) affected from 21.3.0 to 21.3.0M-13 (incl.) affected from 1.0.0 to 21.3.0 (excl.)

Affected Configurations

Captive portal, or application firewall must be enabled on at least one SSID. If none of these features are configured, the web gateway service does not perform the lookups that expose this vulnerability. Additionally, this can be exploited by an associated client.

Workarounds

If captive portal and application firewall are not required, disabling these features on all SSIDs eliminates exposure to this vulnerability.

Solutions

CVE-2026-102162 has been fixed in the following releases: - 22.1.1F-61 and later release in the 22.x train - 21.4.0M-12 and later releases in the 21.x train

References

https://www.arista.com/en/support/advisories-notices/security-advisory/24809-security-advisory-0193

Problem Types

CWE-121 Stack-based Buffer Overflow CWE

Impacts

CAPEC-100 Overflow Buffers