Low Info disclosure

CVE-2025-3456 — On affected platforms running Arista EOS, the global common encryption key configuration may be logged in clear text, in local or remote accounting logs. Knowledge of both the encryption key and protocol specific encrypted secrets from the device running-

On affected platforms running Arista EOS, the global common encryption key configuration may be logged in clear text, in local or remote accounting logs. Knowledge of both the encryption key and protocol specific encrypted secrets from the device running-config could then be used to obtain protocol specific passwords in cases where symmetric passwords are required between devices with neighbor protocol relationships.

Published Aug 25, 2025 · Updated Oct 13, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP · CNA: Arista

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

EPSS 0.1% (30-day exploitation probability)+0

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

0.11%

ahead of 1% of scored CVEs · Oct 14, 2026

Affects

Arista Networks

EOS

CVSS base

3.8

Low · 2 source(s)

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation

None

none · proof-of-concept · active

Automatable

can an attacker script the kill-chain steps

Technical impact

Partial

partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Arista Networks EOS).
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes matching the vulnerability class (info disclosure), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Arista Networks	EOS	version 4.34.0F≥ 4.33.0 and ≤ 4.33.3F≥ 4.32.0 and ≤ 4.32.5M≥ 4.31.0 and ≤ 4.31.7M≥ 4.30.0 and ≤ 4.30.10M≥ 4.29.0 and ≤ 4.29.10M	Vulnerable	CVE Program (cve.org) e CISA ADP

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector

Local

Attack complexity

Low

Privileges required

Low

User interaction

None

Scope

Changed

Confidentiality

Low

Integrity

None

Availability

None

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Scored by
3.8	CVSS 3.1	Low	2.0	1.4	psirt@arista.com via NIST National Vulnerability Database
3.8	CVSS 3.1	Low	—	—	Arista via CVE Program (cve.org) e CISA ADP

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N (score shown at the top: psirt@arista.com)

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-532 · Insertion of Sensitive Information into Log File

Other CVEs with this weakness →

EPSS over time FIRST

Oct 13, 2026 → Oct 14, 2026 · 2 reading(s) · max 0.11%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Local/physical vector: focus on endpoint telemetry (EDR) from affected hosts.
Look for anomalous data read/export volumes and access to sensitive records.

endpoint telemetry (EDR)application logsauthentication logs

Timeline

What happened to this CVE, newest first.

2026
Affected products added · arista networks/eos
Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
SSVC assessment updated
Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
Record published
Oct 13, 2026
CVSS changed · 3.8
Oct 13, 2026 · NIST National Vulnerability Database
Source status changed · → Deferred
Oct 13, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 13, 2026 · NIST National Vulnerability Database
2025
CVE published
Aug 25, 2025 · Arista

Source activity

Repeated readings are counted rather than listed.

1× Official description updated · Oct 13, 2026 – Oct 13, 2026

References

1 on the record

www.arista.com/en/support/advisories-notices/security-advisory/22022-security-adviso
NIST National Vulnerability Database

Elsewhere on this site

Arista Networks
every CVE for this vendor

Info disclosure
same class

CWE-532
other pages naming this weakness

Related CVEs (same products)

Medium CVE-2026-2379 Arista EOS IPsec Tunnel Sequence Number Mismatch via Interface Flaps when Anti-Replay is Disabled Jun 5, 2026
Medium CVE-2026-7473 Arista Extensible Operating System Incomplete Comparison with Missing Factors Vulnerability KEV Jun 5, 2026
Critical CVE-2024-27892 On affected platforms running Arista EOS with OpenConfig configured, a gNMI Set request can be run when it should have been rejected (SSL Profiles Enabled). Jun 4, 2026
High CVE-2025-8873 Arista EOS Dataplane Denial of Service via Malformed IPsec Packet Jun 4, 2026
Critical CVE-2024-27890 On affected platforms running Arista EOS with OpenConfig configured, a gNMI Set request can be run when it should have been rejected (No SSL Profiles Enabled). Jun 4, 2026
Medium CVE-2023-5502 On affected platforms running Arista EOS with 802.1x authentication configured on the access/trunk ports, a malicious supplicant may bypass authentication. Jun 4, 2026

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No fixed version, patch or mitigation documented.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2025-3456 is "On affected platforms running Arista EOS, the global common encryption key configuration may be logged in clear text, in local or remote accounting logs. Knowledge of both the encryption key and protocol specific encrypted secrets from the device running-", rated Low. It affects EOS (Arista Networks); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 3.8 describes technical severity. EPSS 0.11% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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