Cyber Resilience

CVE-2022-40022

RCE in Microchip Syncserver S650 Firmware

Public PoCHigh EPSSRCECommand Injection
Published
13 February 2023
Modified
21 March 2025
Patch / advisory
View advisory
CVSS Score v3.1 9.8
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.92 99.8th percentile
Risk Priority 97 floored blend · peak EPSS

CVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.

Summary

CVE-2022-40022 is a critical-severity Command Injection (CWE-77) vulnerability in Microchip Syncserver S650 Firmware. Its CVSS base score is 9.8 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Command and Scripting Interpreter (T1059); ranked in the top 0.2% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

Deeper analysis AI-assisted summary

Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.

Microchip Technology (Microsemi) SyncServer S650 contains a command injection vulnerability tracked as CVE-2022-40022 and assigned CWE-77. The flaw received a CVSS 3.1 score of 9.8, reflecting network attack vector, low attack complexity, and no requirements for authentication or user interaction. The affected device is a network time server used for precise timing and synchronization in enterprise and telecommunications environments.

Unauthenticated remote attackers can exploit the issue over the network to inject and execute arbitrary operating-system commands. Successful exploitation grants full control over the device, enabling complete compromise of confidentiality, integrity, and availability without any prior credentials or user assistance.

Public references include an exploit proof-of-concept published on Packet Storm and a detailed advisory on Securifera, confirming unauthenticated remote command execution is achievable. The EPSS score currently stands at 0.9078 with a recorded peak of 0.9084, indicating sustained high exploitation probability since disclosure. No vendor patch or mitigation guidance is described in the supplied references.

OWASP Top 10 for Web (2025)

A05:2025 Injection

EU & UK References

Vulnerability Data

Microchip Technology (Microsemi) SyncServer S650 was discovered to contain a command injection vulnerability.

CWE(s)
CWE-77

Related Threats

MITRE ATT&CK Enterprise Techniques

T1059 Command and Scripting Interpreter Execution
Adversaries may abuse command and script interpreters to execute commands, scripts, or binaries.
attack.mitre.org →
T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1059.001 PowerShell Execution
Adversaries may abuse PowerShell commands and scripts for execution.
attack.mitre.org →
T1059.003 Windows Command Shell Execution
Adversaries may abuse the Windows command shell for execution.
attack.mitre.org →
T1059.004 Unix Shell Execution
Adversaries may abuse Unix shell commands and scripts for execution.
attack.mitre.org →
T1059.008 Network Device CLI Execution
Adversaries may abuse scripting or built-in command line interpreters (CLI) on network devices to execute malicious command and payloads.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2026-32241Shared CWE-77
CVE-2024-29864Shared CWE-77
CVE-2024-44400Shared CWE-77
CVE-2023-3739Shared CWE-77
CVE-2023-45852Shared CWE-77
CVE-2024-30637Shared CWE-77
CVE-2023-52291Shared CWE-77
CVE-2026-2256Shared CWE-77
CVE-2023-51812Shared CWE-77
CVE-2024-50591Shared CWE-77

Affected Assets

microchip
syncserver s650 firmware
all versions

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V1.2.3
  • V1.2.5
  • V1.2.8
  • V1.2.9

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

Secure SDLC practices directly require input validation and neutralization that prevent command injection.

DE.CM-09 partial match
prevents

Runtime monitoring of software and data can detect anomalous command execution resulting from injection.

ID.RA-01 partial match
prevents

Identifying recorded vulnerabilities enables remediation of command-injection flaws before exploitation.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.28 Secure coding mostly match
prevents

Secure coding standards require proper escaping and parameterization of commands, directly eliminating CWE-77.

A.8.29 Security testing in development and acceptance mostly match
finds

Security testing in development catches command-injection vulnerabilities before release.

A.8.25 Secure development life cycle partial match
prevents

Secure development life cycle mandates input validation and command construction practices that directly prevent command injection.

A.8.26 Application security requirements partial match
prevents

Application security requirements explicitly call for controls against injection flaws including command injection.

A.8.27 Secure system architecture and engineering principles partial match
prevents

Secure architecture principles reduce the attack surface but do not prescribe the specific neutralization techniques needed.

References