CVE-2022-40022 — Syncserver S650 Firmware
CRITICALCVE-2022-40022 is a critical-severity (CVSS 9.8) CWE-77 vulnerability in microchip syncserver s650 firmware. 1 public exploit reference exists, so weaponization risk is real. No vendor fix is recorded yet; mitigation options are listed below.
Microchip Technology (Microsemi) SyncServer S650 was discovered to contain a command injection vulnerability.
Exploitation Status
No confirmed exploitation observed yet
- CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
- A successful exploit gives an attacker total control of the affected component, not partial access.
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for CVE-2022-40022.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
CVE-2022-40022 by exploitation likelihood (EPSS) against impact (CVSS). In the shaded patch-first corner (EPSS 50%+, CVSS 7.0+).
Where this sits among everything scored
Of 395,249 CVEs with a current EPSS score, this one falls in the ≥ 90% band (highlighted). Counts from FIRST.org, log-scaled.
Description
Microchip Technology (Microsemi) SyncServer S650 was discovered to contain a command injection vulnerability.
Affected Products
syncserver s650 firmwaremicrochipResearch use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
Detection & mitigation playbook
Vendor / applianceDetect
Inventory every microchip syncserver s650 firmware deployment and check each version against the affected-products list above.
Remediation status
No patch has shipped for CVE-2022-40022 yet — track the microchip syncserver s650 firmware advisory for a fixed release and apply the workarounds below in the meantime.
Mitigate without a patch
Stop passing untrusted input into the interpreter or shell: call the affected binary with an argument array rather than a composed command string, reject anything outside a strict allowlist of expected values, and run the component under an account that cannot reach beyond the work it legitimately does. Alongside that, restrict the management interface to trusted networks and apply the vendor's recommended configuration mitigations.
How to detect CVE-2022-40022
A community-maintained Nuclei template exists for this CVE. You can scan for it directly:
nuclei -id cve-2022-40022 -u https://target- Template
- Symmetricom SyncServer Unauthenticated - Remote Command Execution
- Severity
- critical
- Impact
- Successful exploitation of this vulnerability could allow an attacker to execute arbitrary commands on the affected device.
- Remediation
- Apply the latest security patches or firmware updates provided by the vendor to mitigate this vulnerability.
Template by ProjectDiscovery nuclei-templates (DhiyaneshDK, mielverkerken), MIT licensed. View the full template. Scan only systems you are authorised to test.
Frequently Asked Questions
Is CVE-2022-40022 being exploited in your environment?
Detect and block the exploit chain at execution, on systems you cannot patch yet.