CVE-2020-22724

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-24. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 5%CVSS: 9.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

A remote command execution vulnerability exists in add_server_service of PPTP_SERVER in Mercury Router MER1200 v1.0.1 and Mercury Router MER1200G v1.0.1.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
51(Track)
EG Risk 51/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation5% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
91.8%
KEV
Not listed

Published

October 14, 2021

Last Modified

November 21, 2024

Advisory Details (2)

Auto-updated Jul 7, 2026
⚠️ Active exploitation confirmed. No patch confirmed yet.
generic

CVE_Apply/Mercury/Mercury MER1200 Router v1.0.1 RCE .md at master · MrRtcl/CVE_Apply · GitHub

https://github.com/DarkEyeR/CVE_Apply/blob/master/Mercury/Mercury%20MER1200%20Router%20v1.0.1%20RCE%20%20.md
generic🔴 Active Exploitation

CWE - CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') (4.20)

https://cwe.mitre.org/data/definitions/78.html

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 12× in last 7d / 42× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-23 01:51 UTCEG score recompute
  2. 2026-07-22 22:37 UTCEG score recompute
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  59. 2026-05-26 09:04 UTCEG score recompute
  60. 2026-05-26 09:04 UTCGHSA enrichment
  61. 2026-05-26 07:17 UTCEPSS rescore
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  63. 2026-05-24 16:48 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2020-22724?
CVE-2020-22724 is a critical vulnerability published on October 14, 2021. A remote command execution vulnerability exists in addserverservice of PPTP_SERVER in Mercury Router MER1200 v1.0.1 and Mercury Router MER1200G v1.0.1.
When was CVE-2020-22724 disclosed?
CVE-2020-22724 was first published in the National Vulnerability Database on October 14, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2020-22724 actively exploited?
CVE-2020-22724 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 91.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2020-22724?
CVE-2020-22724 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2020-22724?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-22724, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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