CVE-2021-22816
What it is
A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists that could cause a Denial of Service of the RTU when receiving a specially crafted request over Modbus, and the RTU is configured as a Modbus server. Affected Products: SCADAPack 312E, 313E, 314E, 330E, 333E, 334E, 337E, 350E and 357E RTUs with firmware V8.18.1 and prior
At a glance
- Exploitability
- Can be exploited over the network without logging in. High risk of service disruption.
- Exploit odds
- 0.9% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 0.9% in the next 30 days (EPSS).
- Severity: 7.5 HIGH (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 0.9% · EPSS, next 30 days
- Weakness
- CWE-754
- Record status
- Modified
Affected
- schneider-electric Scadapack 312e Firmware < 8.19.1
- schneider-electric Scadapack 313e Firmware < 8.19.1
- schneider-electric Scadapack 314e Firmware < 8.19.1
- schneider-electric Scadapack 330e Firmware < 8.19.1
- schneider-electric Scadapack 333e Firmware < 8.19.1
- schneider-electric Scadapack 334e Firmware < 8.19.1
- schneider-electric Scadapack 337e Firmware < 8.19.1
- schneider-electric Scadapack 350e Firmware < 8.19.1
Attack profile CVSS 3.1 · 7.5
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Raw vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2021-22816.md and follow it. Check whether this project is affected by CVE-2021-22816. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2021-313-01
- https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2021-313-01