Arista EOS up to 4.34.7M/4.35.6M/4.36.1M resource consumption

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.4$0-$5k0.29+

Summaryinfo

A vulnerability identified as critical has been detected in Arista EOS up to 4.34.7M/4.35.6M/4.36.1M. This issue affects some unknown processing. Performing a manipulation results in resource consumption. This vulnerability is known as CVE-2026-121369. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability was found in Arista EOS up to 4.34.7M/4.35.6M/4.36.1M. It has been classified as critical. This affects some unknown functionality. The manipulation with an unknown input leads to a resource consumption vulnerability. CWE is classifying the issue as CWE-400. The product does not properly control the allocation and maintenance of a limited resource. This is going to have an impact on availability. The summary by CVE is:

On affected platforms running Arista EOS under specific link configurations an attacker with direct connectivity to the system may cause system CPU and memory utilization to increase considerably leading to slow responsiveness and eventually may cause the system to reboot.

The advisory is shared at arista.com. This vulnerability is uniquely identified as CVE-2026-121369 since 11/03/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.4

VulDB Base Score: 7.5
VulDB Temp Score: 7.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 5.3
CNA Vector (Arista): 🔒

CVSSv2info

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

Exploitinginfo

Class: Resource consumption
CWE: CWE-400 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: Yes
Local: Partially
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

11/03/2026 CVE reserved
11/10/2026 +7 days Advisory disclosed
11/10/2026 +0 days VulDB entry created
11/10/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: arista.com
Status: Confirmed

CNA: Arista
CVE: CVE-2026-121369 (🔒)

GCVE (CVE): GCVE-0-2026-121369
GCVE (VulDB): GCVE-100-434625

Entryinfo

Created: 11/10/2026 21:41
Changes: 11/10/2026 21:41 (72)
Complete: 🔍
Cache ID: 216::103

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

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