CVE-2022-20676

MEDIUMNVD 5.16.7▲
EchelonGraph scoreMEDIUM confidence

Score 6.7 from GitHub Security Advisory (severity: HIGH) published 2022-04-16. NVD baseline CVSS 5.1; sources differ by 1.6.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
5.1
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.1Exploit: NoneExposed: 0

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

A vulnerability in the Tool Command Language (Tcl) interpreter of Cisco IOS XE Software could allow an authenticated, local attacker to escalate from privilege level 15 to root-level privileges. This vulnerability is due to insufficient input validation of data that is passed into the Tcl interpreter. An attacker could exploit this vulnerability by loading malicious Tcl code on an affected device. A successful exploit could allow the attacker to execute arbitrary commands as root. By default, Tcl shell access requires privilege level 15.

CVSS v3
5.1
EG Score
6.7(medium)
EPSS
19.2%
KEV
Not listed

Published

April 15, 2022

Last Modified

November 21, 2024

References (2)

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 46× 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. 2026-07-21 15:22 UTCEPSS rescore
  2. 2026-07-21 15:22 UTCEPSS rescore
  3. 2026-07-20 17:05 UTCEPSS rescore
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  1. 2026-07-06 02:21 UTCEPSS rescore
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  6. 2026-07-01 15:04 UTCEPSS rescore
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  21. 2026-06-22 14:24 UTCEPSS rescore
  22. 2026-06-21 14:55 UTCEPSS rescore
  23. 2026-06-21 01:58 UTCEPSS rescore
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  25. 2026-06-19 19:24 UTCEPSS rescore
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  27. 2026-06-18 17:51 UTCEPSS rescore
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  44. 2026-06-07 15:23 UTCEPSS rescore
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  46. 2026-06-06 13:46 UTCEPSS rescore
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  48. 2026-06-05 22:45 UTCEPSS rescore
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  56. 2026-05-31 22:29 UTCEPSS rescore
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  62. 2026-05-27 13:39 UTCEPSS rescore
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  66. 2026-05-26 07:17 UTCEPSS rescore
  67. 2026-05-26 07:17 UTCEPSS rescore
  68. 2026-05-25 23:46 UTCEG score recompute
  69. 2026-05-25 23:46 UTCGHSA enrichment

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Frequently asked(5)

What is CVE-2022-20676?
CVE-2022-20676 is a medium vulnerability published on April 15, 2022. A vulnerability in the Tool Command Language (Tcl) interpreter of Cisco IOS XE Software could allow an authenticated, local attacker to escalate from privilege level 15 to root-level privileges. This vulnerability is due to insufficient input validation of data that is passed into the Tcl…
When was CVE-2022-20676 disclosed?
CVE-2022-20676 was first published in the National Vulnerability Database on April 15, 2022, 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-2022-20676 actively exploited?
CVE-2022-20676 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 19.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2022-20676?
CVE-2022-20676 has a CVSS v3 base score of 5.1 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 6.7.
How do I remediate CVE-2022-20676?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-20676, 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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