In Arista EOS malformed packets can be incorrectly forwarded across VLAN boundaries in…
Priority LOW 26Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
In Arista EOS malformed packets can be incorrectly forwarded across VLAN boundaries in one direction. This vulnerability is only susceptible to exploitation by unidirectional traffic (ex. UDP) and not bidirectional traffic (ex. TCP). This affects: EOS 7170 platforms version 4.21.4.1F and below releases in the 4.21.x train; EOS X-Series versions 4.21.11M and below releases in the 4.21.x train; 4.22.6M and below releases in the 4.22.x train; 4.23.4M and below releases in the 4.23.x train; 4.24.2.1F and below releases in the 4.24.x train.
Why it matters now
EPSS 0.00987 62nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 50
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:* | 4.21.0f – 4.21.4.1f | Vulnerable | Arista |
| cpe:2.3:h:arista:7170-32c:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7170-32cd:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7170-64c:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:* | 4.21.0f – 4.21.11m; 4.22.0f – 4.22.6m; 4.23.0f – 4.23.4m; 4.24.0f – 4.24.2.1f | Vulnerable | Arista |
| cpe:2.3:h:arista:7050cx3-32s:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7050cx3m-32s:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7050qx-32s:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7050qx2-32s:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7050sx-128:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
- cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:* Versions 4.21.0f – 4.21.4.1f Vulnerable ·Arista
- cpe:2.3:h:arista:7170-32c:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7170-32cd:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7170-64c:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:* Versions 4.21.0f – 4.21.11m; 4.22.0f – 4.22.6m; 4.23.0f – 4.23.4m; 4.24.0f – 4.24.2.1f Vulnerable ·Arista
- cpe:2.3:h:arista:7050cx3-32s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7050cx3m-32s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7050qx-32s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7050qx2-32s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7050sx-128:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
Show 40 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:h:arista:7050sx-64:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7050sx-72q:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7050sx2-128:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7050sx2-72q:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7050sx3-48c8:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7050sx3-48yc:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7050sx3-48yc12:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7050sx3-48yc8:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7050sx3-96yc8:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7050tx-48:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7050tx-64:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7050tx-72q:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7050tx2-128:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7050tx3-48c8:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7060cx-32s:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7060cx2-32s:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7060dx4-32:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7060px4-32:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7060sx2-48yc6:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:720xp-24y6:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:720xp-24zy4:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:720xp-48y6:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:720xp-48zc2:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:720xp-96zc2:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7250qx-64:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7260cx:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7260cx3:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7260cx3-64:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7260qx:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7300x-32q:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7300x-64s:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7300x-64t:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7300x3-32c:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7300x3-48yc4:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7304x3:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7308x3:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7320x-32c:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7324x:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7328x:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7368x4:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
- cpe:2.3:h:arista:7050sx-64:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7050sx-72q:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7050sx2-128:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7050sx2-72q:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7050sx3-48c8:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7050sx3-48yc:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7050sx3-48yc12:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7050sx3-48yc8:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7050sx3-96yc8:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7050tx-48:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7050tx-64:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7050tx-72q:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7050tx2-128:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7050tx3-48c8:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7060cx-32s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7060cx2-32s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7060dx4-32:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7060px4-32:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7060sx2-48yc6:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:720xp-24y6:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:720xp-24zy4:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:720xp-48y6:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:720xp-48zc2:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:720xp-96zc2:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7250qx-64:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7260cx:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7260cx3:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7260cx3-64:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7260qx:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7300x-32q:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7300x-64s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7300x-64t:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7300x3-32c:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7300x3-48yc4:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7304x3:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7308x3:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7320x-32c:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7324x:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7328x:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7368x4:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-15898
- 2026-10-03 Alias added: GHSA-63qj-x5v8-6jj4
References
More Arista Eos vulnerabilities
- TI-2014-05975 GNU Bash through 4.3 bash43-025 processes trailing strings after certain malformed… KEVCVSS 3.1CRITICAL 9.8
- TI-2014-05157 GNU Bash through 4.3 processes trailing strings after function definitions in the values… KEVCVSS 3.1CRITICAL 9.8
- TI-2026-06569 Arista EOS Unexpected Tunnel Protocol Decapsulation and Forwarding Bypass KEVCVSS 4.0MEDIUM 6.9
- TI-2017-10594 Heap-based buffer overflow in dnsmasq before 2.78 allows remote attackers to cause a… CVSS 3.1CRITICAL 9.8
- TI-2024-05929 Openssh: regresshion - race condition in ssh allows rce/dos CVSS 3.1HIGH 8.1
- TI-2020-08209 utility.c in telnetd in netkit telnet through 0.17 allows remote attackers to execute… CVSS 3.1CRITICAL 9.8
Sources
- CVE-2020-15898 · CVE Program
- CVE-2020-15898 · NVD
- FIRST EPSS
- GHSA-63qj-x5v8-6jj4 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences