CVE-2020-16138

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2022-05-24. NVD baseline CVSS 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Weaponized
7.5EG
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • Public exploit code is available (Metasploit, epss top5pct, public exploit)
CISA-KEV: Not listedEPSS PROB: 21%CVSS: 7.5Exploit: Metasploit · epss top5pct · public exploitExposed: 0

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

A denial-of-service issue in Cisco Unified IP Conference Station 7937G 1-4-4-0 through 1-4-5-7 allows attackers to remotely disable the device until it is power cycled. Note: We cannot prove this vulnerability exists. Out of an abundance of caution, this CVE is being assigned to better serve our customers and ensure all who are still running this product understand that the product is end of life and should be removed or upgraded. For more information on this, and how to upgrade, refer to the CVE’s reference information

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
75(Track)
EG Risk 75/100SSVC: 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
Severity75% × 45%
Exploitation65% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
21%
EPSS %ILE
97%
KEV
Not listed

Published

August 12, 2020

Last Modified

November 21, 2024

References (6)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 28× 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.

Showing the most recent 100 of 108 total refreshes for this CVE.

  1. 2026-08-20 22:52 UTCEPSS rescore
  2. 2026-08-19 17:00 UTCEPSS rescore
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  1. 2026-07-23 14:15 UTCEPSS rescore
  2. 2026-07-23 01:50 UTCEG score recompute
  3. 2026-07-22 22:35 UTCEG score recompute
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  45. 2026-06-21 01:57 UTCEPSS rescore
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  47. 2026-06-18 17:50 UTCEPSS rescore
  48. 2026-06-17 17:50 UTCEPSS rescore
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  50. 2026-06-16 17:50 UTCEPSS rescore
  51. 2026-06-15 17:46 UTCEPSS rescore
  52. 2026-06-14 23:15 UTCEPSS rescore
  53. 2026-06-13 22:58 UTCEPSS rescore
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  55. 2026-06-12 23:10 UTCEPSS rescore
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  72. 2026-05-31 00:15 UTCEPSS rescore
  73. 2026-05-31 00:15 UTCEPSS rescore
  74. 2026-05-29 13:42 UTCEPSS rescore
  75. 2026-05-28 13:43 UTCEPSS rescore

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Metasploit module). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Metasploitauxiliary/dos/cisco/cisco_7937g_dos✓ verified
    First seen Jun 2, 2020

    Cisco 7937G Denial-of-Service Attack

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2020-16138?
CVE-2020-16138 is a high vulnerability published on August 12, 2020. A denial-of-service issue in Cisco Unified IP Conference Station 7937G 1-4-4-0 through 1-4-5-7 allows attackers to remotely disable the device until it is power cycled. Note: We cannot prove this vulnerability exists. Out of an abundance of caution, this CVE is being assigned to better serve our…
When was CVE-2020-16138 disclosed?
CVE-2020-16138 was first published in the National Vulnerability Database on August 12, 2020, 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-2020-16138 actively exploited?
CVE-2020-16138 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 21% probability of exploitation in the next 30 days, which ranks it in the top 2.6% of all scored CVEs.
What is the CVSS score of CVE-2020-16138?
CVE-2020-16138 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2020-16138?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-16138, 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.

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