AC500 V2 unauthenticated crafter packet vulnerability
Priority MEDIUM 41CWE-789Published · 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 · CNA. Fix status from CNA. Impact type from CWE-789.
Summary
An unauthenticated specially crafted packet sent by an attacker over the network will cause a denial-of-service (DoS) vulnerability. Vulnerability allows attacker to stop the PLC. After stopping (ERR LED flashing red), physical access to the PLC is required in order to restart the application. This issue affects: ABB AC500 V2 products with onboard Ethernet version 2.8.4 and prior versions.
Why it matters now
EPSS 0.01627 76th percentileScored 2026-11-07
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 |
|---|---|---|---|---|---|
| ABB | AC500 V2 products with onboard Ethernet | version 2.8.4 and prior versions | — | No fix listed | CNA |
- AC500 V2 products with onboard Ethernet VendorABB Affected version 2.8.4 and prior versions Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-24685
- 2026-10-03 Alias added: GHSA-cvwc-6hv2-wv97
References
More ABB Ac500 Cpu Firmware vulnerabilities
- TI-2022-02947 Improper check for unusual or exceptional conditions in ABB AC500 V2 CVSS 3.1MEDIUM 5.3
Sources
- CVE-2020-24685 · CVE Program
- CVE-2020-24685 · NVD
- FIRST EPSS
- GHSA-cvwc-6hv2-wv97 · GitHub Advisory Database · CC BY 4.0
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