Arista fixes 6 vulnerabilities

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[TLP:CLEAR] Arista fixes 6 vulnerabilities

Arista fixes 6 vulnerabilities in Arista EOS and Streaming Telemetry Agent (TerminAttr) products. The most severe of them are described below; the others can be found at [1]. Individual products and their fixed versions: Streaming Telemetry Agent (TerminAttr) - 1.31.16, 1.34.13, 1.37.11, 1.40.10, 1.43.6, 1.44.1, 1.45.0 [1] Arista EOS - 4.33.9M, 4.34.8M, 4.35.6M, 4.36.1F [1] The fixed EOS versions 4.33.9M, 4.34.8M and 4.35.6M were not yet available when the advisory was released. Until they are released, the recommended fix is to upgrade the TerminAttr agent [1].

Arista EOS, TerminAttr - data tampering (CVE-2026-11705)

CVSS 9.0 (Critical)

Allows an authenticated remote attacker to modify the device's system data by means of a specially crafted set of packets, if the Streaming Telemetry agent is run in a non-standard configuration with data writing enabled [1].

The vulnerability is present in products:

TerminAttr; >=1.31.0, <1.31.16; >=1.34.0, <1.34.13; >=1.37.0, <1.37.11; >=1.40.0, <1.40.10; >=1.43.0, <1.43.6; >=1.44.0, <1.44.1
Arista EOS; >=4.31.0, <=4.31.10M; >=4.32.0, <=4.32.11M; >=4.33.0, <4.33.9M; >=4.34.0, <4.34.8M; >=4.35.0, <4.35.6M; >=4.36.0F, <4.36.1F

CVSS: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

More information:

CVE-2026-11705 at cve.org, NVD
CWE-250: Execution with Unnecessary Privileges at cwe.mitre.org

The vulnerability was publicly disclosed 23. 6. 2026.

Arista EOS, TerminAttr - improper certificate validation (CVE-2026-52896)

CVSS 8.2 (High)

Allows an unauthenticated remote attacker to compromise the confidentiality of communication due to improper certificate validation by the Streaming Telemetry agent, if the agent is configured with a gRPC tunnel [1].

The vulnerability is present in products:

TerminAttr; >=1.31.0, <1.31.16; >=1.34.0, <1.34.13; >=1.37.0, <1.37.11; >=1.40.0, <1.40.10; >=1.43.0, <1.43.6; >=1.44.0, <1.44.1
Arista EOS; >=4.31.0, <=4.31.10M; >=4.32.0, <=4.32.11M; >=4.33.0, <4.33.9M; >=4.34.0, <4.34.8M; >=4.35.0, <4.35.6M; >=4.36.0F, <4.36.1F

CVSS: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

More information:

CVE-2026-52896 at cve.org, NVD
CWE-295: Improper Certificate Validation at cwe.mitre.org

The vulnerability was publicly disclosed 23. 6. 2026.

Arista EOS, TerminAttr - privilege escalation (CVE-2026-52897)

CVSS 6.3 (Medium)

Allows an authenticated local attacker to escalate their privileges if the Streaming Telemetry agent is configured to stream to CloudVision [1].

The vulnerability is present in products:

TerminAttr; >=1.31.0, <1.31.16; >=1.34.0, <1.34.13; >=1.37.0, <1.37.11; >=1.40.0, <1.40.10; >=1.43.0, <1.43.6; >=1.44.0, <1.44.1
Arista EOS; >=4.31.0, <=4.31.10M; >=4.32.0, <=4.32.11M; >=4.33.0, <4.33.9M; >=4.34.0, <4.34.8M; >=4.35.0, <4.35.6M; >=4.36.0F, <4.36.1F

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

More information:

CVE-2026-52897 at cve.org, NVD
CWE-269: Improper Privilege Management at cwe.mitre.org

The vulnerability was publicly disclosed 23. 6. 2026.

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[TLP:CLEAR] Arista fixes 6 vulnerabilities

Arista EOS, TerminAttr - data tampering (CVE-2026-11705)

CVSS 9.0 (Critical)

Arista EOS, TerminAttr - improper certificate validation (CVE-2026-52896)

CVSS 8.2 (High)

Arista EOS, TerminAttr - privilege escalation (CVE-2026-52897)

CVSS 6.3 (Medium)

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