CVE-2021-40507
9.8 · CRITICALOverview
CVE-2021-40507 is a critical-severity vulnerability affecting openrisc or1200_firmware. It was published on April 18, 2023 and has a CVSS 3.1 base score of 9.8 (CRITICAL).
This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
An issue was discovered in the ALU unit of the OR1200 (aka OpenRISC 1200) processor 2011-09-10 through 2015-11-11. The overflow flag is not being updated correctly for the subtract instruction, which results in an incorrect value in the overflow flag. Any software that relies on this flag may experience corruption in execution.
Remediation
Check the references section for vendor advisories and patches from openrisc. Update or1200_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| openrisc | or1200_firmware | 2011-09-10 | Affected |
Frequently Asked Questions
What is CVE-2021-40507?
CVE-2021-40507 is a critical-severity vulnerability affecting openrisc or1200_firmware. It was published on April 18, 2023 and has a CVSS 3.1 base score of 9.8 (CRITICAL).
How severe is CVE-2021-40507?
This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2021-40507?
Check the references section for vendor advisories and patches from openrisc. Update or1200_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-40507?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-40507 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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