Uncontrolled resource consumption in Arista EOS
Priority HIGH 72CWE-400Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-400.
Summary
For certain systems running EOS, a Precision Time Protocol (PTP) packet of a management/signaling message with an invalid Type-Length-Value (TLV) causes the PTP agent to restart. Repeated restarts of the service will make the service unavailable.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.01014 63rd 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
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Arista | EOS | 4.22; 4.27.1 – 4.27.0; 4.26.4 – 4.26.0; 4.25.6 – 4.25.0; 4.24.8 – 4.24.0; 4.23.10 – 4.23.0 | — | No fix listed | CNA |
- EOS VendorArista Affected 4.22; 4.27.1 – 4.27.0; 4.26.4 – 4.26.0; 4.25.6 – 4.25.0; 4.24.8 – 4.24.0; 4.23.10 – 4.23.0 Fixed in — No fix listed CNA
CPE configurations NVD · 77
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:* | before 4.23.10; 4.24.0 to before 4.24.8; 4.25.0 to before 4.25.6; 4.26.0 to before 4.26.4; 4.27.0 to before 4.27.1 | Vulnerable | Arista |
| cpe:2.3:h:arista:7020r:-:*:*:*:*:*:*:* | not specified by NVD | Running on | 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: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:o:arista:eos:*:*:*:*:*:*:*:* Versions before 4.23.10; 4.24.0 to before 4.24.8; 4.25.0 to before 4.25.6; 4.26.0 to before 4.26.4; 4.27.0 to before 4.27.1 Vulnerable ·Arista
- cpe:2.3:h:arista:7020r:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·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
- 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
Show 67 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| 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:7150s-24:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7150s-52:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7150s-64:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7150sc-24:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7150sc-64:-:*:*:*:*:*:*:* | not specified by NVD | Running on | 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: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:7280e:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7280r:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7280r2:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7280r3:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7280sr3-48yc8:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7280sr3k-48yc8:-:*:*:*:*:*:*:* | 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:7500e:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7500r:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7500r2:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7500r3:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7500r3-24d:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7500r3-24p:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7500r3-36cq:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7500r3k-36cq:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7504r3:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7508r3:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7512r3:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7800r3-36p:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7800r3-48cq:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7800r3k-48cq:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7804r3:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
| cpe:2.3:h:arista:7808r3:-:*:*:*:*:*:*:* | 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:7150s-24:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7150s-52:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7150s-64:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7150sc-24:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7150sc-64:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·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: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:7280e:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7280r:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7280r2:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7280r3:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7280sr3-48yc8:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7280sr3k-48yc8:-:*:*:*:*:*:*:* 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
- cpe:2.3:h:arista:7500e:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7500r:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7500r2:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7500r3:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7500r3-24d:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7500r3-24p:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7500r3-36cq:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7500r3k-36cq:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7504r3:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7508r3:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7512r3:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7800r3-36p:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7800r3-48cq:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7800r3k-48cq:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7804r3:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
- cpe:2.3:h:arista:7808r3:-:*:*:*:*:*:*:* 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-2021-28510
- 2026-10-03 Alias added: GHSA-c5c5-rwc6-67m5
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-2021-28510 · CVE Program
- CVE-2021-28510 · NVD
- FIRST EPSS
- GHSA-c5c5-rwc6-67m5 · 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