CVE-2022-20755

CRITICALNVD 9.09.0—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.0 under NVD CVSS v3. EPSS exploit probability: 3.3% (88th percentile of EPSS-scored CVEs). GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
9.0EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 3.3%CVSS: 9.0Exploit: None knownExposed services: Not assessed

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

Multiple vulnerabilities in the API and web-based management interfaces of Cisco Expressway Series and Cisco TelePresence Video Communication Server (VCS) could allow an authenticated, remote attacker with read/write privileges to the application to write files or execute arbitrary code on the underlying operating system of an affected device as the root user. For more information about these vulnerabilities, see the Details section of this advisory.

CVSS v3
9.0
EG Score
9.0CRITICALmedium confidence
EG Risk
42
EG Risk 42/100CISA SSVC

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
Severity90% × 45%
Exploitation3% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
3.3%
EPSS %ILE
88th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

April 6, 2022

Last Modified

November 21, 2024

Advisory Details (1)

Auto-updated Jul 24, 2026
No fix on record yet.
generic

Cisco Expressway Series and Cisco TelePresence Video Communication Server Vulnerabilities

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-expressway-filewrite-87Q5YRk

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 30× 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 167 total refreshes for this CVE.

  1. 2026-10-10 19:56 UTCEPSS rescore
  2. 2026-10-09 20:04 UTCEPSS rescore
  3. 2026-10-08 16:40 UTCEPSS rescore
  4. 2026-10-07 23:45 UTCEPSS rescore
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  8. 2026-10-03 14:22 UTCEPSS rescore
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  10. 2026-10-02 16:23 UTCEPSS rescore
  11. 2026-09-30 15:48 UTCEG score recompute
  12. 2026-09-30 15:00 UTCEPSS rescore
  13. 2026-09-29 15:15 UTCEPSS rescore
  14. 2026-09-28 13:47 UTCEPSS rescore
  15. 2026-09-26 15:54 UTCEPSS rescore
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  19. 2026-09-23 13:45 UTCEPSS rescore
  20. 2026-09-22 14:44 UTCEPSS rescore
  21. 2026-09-21 20:28 UTCEPSS rescore
  22. 2026-09-19 15:38 UTCEPSS rescore
  23. 2026-09-18 19:24 UTCEPSS rescore
  24. 2026-09-17 19:23 UTCEPSS rescore
  25. 2026-09-16 14:05 UTCEPSS rescore
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  1. 2026-09-16 14:05 UTCEPSS rescore
  2. 2026-09-15 03:06 UTCEPSS rescore
  3. 2026-09-12 14:57 UTCEPSS rescore
  4. 2026-09-11 14:49 UTCEPSS rescore
  5. 2026-09-11 09:33 UTCEPSS rescore
  6. 2026-09-08 21:57 UTCEPSS rescore
  7. 2026-09-07 15:58 UTCEPSS rescore
  8. 2026-09-06 13:45 UTCEPSS rescore
  9. 2026-09-05 15:25 UTCEPSS rescore
  10. 2026-09-04 13:57 UTCEPSS rescore
  11. 2026-09-04 05:03 UTCEPSS rescore
  12. 2026-09-02 14:09 UTCEPSS rescore
  13. 2026-09-01 13:51 UTCEPSS rescore
  14. 2026-08-30 19:14 UTCEPSS rescore
  15. 2026-08-30 01:19 UTCEPSS rescore
  16. 2026-08-28 21:38 UTCEPSS rescore
  17. 2026-08-27 14:22 UTCEPSS rescore
  18. 2026-08-26 14:43 UTCEPSS rescore
  19. 2026-08-25 13:46 UTCEPSS rescore
  20. 2026-08-24 14:13 UTCEPSS rescore
  21. 2026-08-21 23:46 UTCEPSS rescore
  22. 2026-08-20 22:52 UTCEPSS rescore
  23. 2026-08-19 17:01 UTCEPSS rescore
  24. 2026-08-18 13:45 UTCEPSS rescore
  25. 2026-08-17 13:44 UTCEPSS rescore
  26. 2026-08-16 14:53 UTCEPSS rescore
  27. 2026-08-16 02:11 UTCEPSS rescore
  28. 2026-08-15 01:27 UTCEPSS rescore
  29. 2026-08-13 21:57 UTCEPSS rescore
  30. 2026-08-12 13:48 UTCEPSS rescore
  31. 2026-08-11 13:38 UTCEPSS rescore
  32. 2026-08-09 13:44 UTCEPSS rescore
  33. 2026-08-08 16:34 UTCEPSS rescore
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  35. 2026-08-06 13:44 UTCEPSS rescore
  36. 2026-08-05 19:15 UTCEPSS rescore
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  40. 2026-08-02 02:24 UTCEPSS rescore
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  42. 2026-07-30 16:25 UTCEPSS rescore
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  44. 2026-07-28 15:33 UTCEPSS rescore
  45. 2026-07-26 14:52 UTCEPSS rescore
  46. 2026-07-25 14:15 UTCEPSS rescore
  47. 2026-07-24 14:15 UTCEPSS rescore
  48. 2026-07-24 14:15 UTCEPSS rescore
  49. 2026-07-23 14:16 UTCEPSS rescore
  50. 2026-07-23 02:07 UTCEG score recompute
  51. 2026-07-22 22:54 UTCEG score recompute▲ 1.80
  52. 2026-07-22 14:06 UTCEPSS rescore
  53. 2026-07-21 15:22 UTCEPSS rescore
  54. 2026-07-21 15:22 UTCEPSS rescore
  55. 2026-07-20 17:05 UTCEPSS rescore
  56. 2026-07-19 14:29 UTCEPSS rescore
  57. 2026-07-19 02:27 UTCEPSS rescore
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  59. 2026-07-18 10:02 UTCEPSS rescore
  60. 2026-07-16 17:00 UTCEPSS rescore
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  62. 2026-07-15 16:55 UTCEPSS rescore
  63. 2026-07-15 01:58 UTCEPSS rescore
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  65. 2026-07-13 22:27 UTCEPSS rescore
  66. 2026-07-13 06:11 UTCEPSS rescore
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  68. 2026-07-12 05:44 UTCEPSS rescore
  69. 2026-07-11 08:25 UTCEPSS rescore
  70. 2026-07-09 19:07 UTCEPSS rescore
  71. 2026-07-09 19:07 UTCEPSS rescore
  72. 2026-07-08 15:12 UTCEPSS rescore
  73. 2026-07-08 15:12 UTCEPSS rescore
  74. 2026-07-07 13:43 UTCEPSS rescore
  75. 2026-07-06 16:25 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2022-20755?
CVE-2022-20755 is a critical vulnerability published on April 6, 2022. Multiple vulnerabilities in the API and web-based management interfaces of Cisco Expressway Series and Cisco TelePresence Video Communication Server (VCS) could allow an authenticated, remote attacker with read/write privileges to the application to write files or execute arbitrary code on the…
When was CVE-2022-20755 disclosed?
CVE-2022-20755 was first published on April 6, 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-2022-20755 actively exploited?
CVE-2022-20755 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3.3% probability of exploitation in the next 30 days (88th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2022-20755?
CVE-2022-20755 has a CVSS v3 base score of 9.0 (NVD).
How do I remediate CVE-2022-20755?
No fix for CVE-2022-20755 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix.

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