How severe is CVE-2020-9377?

CVE-2020-9377 has a CVSS score of 8.8/10, rated HIGH. Immediate patching is strongly recommended.

Which packages are affected by CVE-2020-9377?

Affected package information for CVE-2020-9377 is not yet fully mapped. Check the official advisory links for details.

How do I fix CVE-2020-9377?

No fixed release is recorded for CVE-2020-9377 yet. Track the upstream advisory, and apply the exposure-reduction steps below in the meantime.

How do I detect CVE-2020-9377 in my code and dependencies?

Identify every host running the affected component and compare the installed build against the fixed version below — for source-built or distro-packaged software the version string, not a lockfile, is the source of truth (`dpkg -l`, `rpm -q`, or the binary's own `--version`).

How do I mitigate CVE-2020-9377 if there is no patch (or I can't update yet)?

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.

Is CVE-2020-9377 actively exploited in the wild?

Yes. There are 5 known exploit references for CVE-2020-9377, including 5 in-the-wild exploitations observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2020-9377?

CVE-2020-9377 has an EPSS (Exploit Prediction Scoring System) score of 21.3%, placing it in the 98th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score warrants monitoring and prompt remediation.

Is CVE-2020-9377 in the CISA Known Exploited Vulnerabilities catalog?

Yes. CVE-2020-9377 (D-Link DIR-610 Devices Remote Command Execution) was added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2022-03-25. CISA required all US federal civilian agencies to remediate this vulnerability by 2022-04-15. The required action was: The impacted product is end-of-life and should be disconnected if still in use. Being listed in the KEV catalog is the strongest possible confirmation of active exploitation — treat this as a critical priority.

What type of vulnerability is CVE-2020-9377?

CVE-2020-9377 is classified as OS Command Injection (CWE-78). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

When was CVE-2020-9377 published, and has it been updated?

CVE-2020-9377 was published on July 9, 2020 and was last updated on October 21, 2025. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🛡️

CISA KEV · ACTIVELY EXPLOITED

HIGH severity

CVE-2020-9377 — GouveaHeitor

HIGH

CVE-2020-9377 is a high-severity (CVSS 8.8) OS Command Injection vulnerability. It is in CISA's Known Exploited Vulnerabilities catalog (added 2022-03-25) — treat it as actively exploited and patch now. No vendor fix is recorded yet; mitigation options are listed below.

D-Link DIR-610 devices allow Remote Command Execution via the cmd parameter to command.php. NOTE: This vulnerability only affects products that are no longer supported by the maintainer

Published

Jul 9, 2020

Updated

Oct 21, 2025

Affected

1 product

Patched

See advisory

Exploits

5 known

Exploitation data as of Oct 23, 2026 · OSV.dev, NVD, CISA KEV, FIRST.org (EPSS)

Exploitation Status

Actively exploited in the wild

Confirmed by CISA's Known Exploited Vulnerabilities catalog on 2022-03-25. Federal agencies were required to remediate by 2022-04-15.
A successful exploit gives an attacker total control of the affected component, not partial access.

Exploitation and automatability from CISA (KEV catalog and SSVC triage) for CVE-2020-9377.

EPSS Exploitation Probability

via FIRST.org ↗

21.3%probability of exploitation in next 30 days

Moderate Risk0.00%

Lower risk than most CVEs98th percentile — riskier than 98% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

CVE-2020-9377 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 395,249 CVEs with a current EPSS score, this one falls in the 10–50% band (highlighted). Counts from FIRST.org, log-scaled.

Description

D-Link DIR-610 devices allow Remote Command Execution via the cmd parameter to command.php. NOTE: This vulnerability only affects products that are no longer supported by the maintainer

Affected Products

1 product · 1 configurations

dir-610 firmwaredlink

all

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.