CVE-2020-15860

CRITICALNVD 9.99.9—
EchelonGraph scoreMEDIUM confidence

Score 9.9 from GitHub Security Advisory published 2022-05-24. NVD baseline CVSS 9.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.9EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 4.0%CVSS: 9.9Exploit: None knownExposed services: Not assessed

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

Parallels Remote Application Server (RAS) 17.1.1 has a Business Logic Error causing remote code execution. It allows an authenticated user to execute any application in the backend operating system through the web application, despite the affected application not being published. In addition, it was discovered that it is possible to access any host in the internal domain, even if it has no published applications or the mentioned host is no longer associated with that server farm.

CVSS v3
9.9
EG Score
9.9CRITICALmedium confidence
EG Risk
51
EG Risk 51/100CISA 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
Severity99% × 45%
Exploitation4% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track* or Attend 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 at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.
EPSS PROB
4.0%
EPSS %ILE
90th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* or Attend 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 at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact total (CVSS ≥ 9.0). 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

July 24, 2020

Last Modified

November 21, 2024

Advisory Details (2)

Auto-updated Sep 30, 2026
No fix on record yet.
generic

Parallels Remote Application Server — App & Desktop Delivery

https://www.parallels.com/products/ras/remote-application-server/
generic

Parallels Remote Application Server — App & Desktop Delivery

https://kb.parallels.com/en/125112

Data Freshness Timeline

(refreshed 6× in last 7d / 26× 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 155 total refreshes for this CVE.

  1. 2026-10-05 17:39 UTCEPSS rescore
  2. 2026-10-04 23:18 UTCEPSS rescore
  3. 2026-10-03 14:22 UTCEPSS rescore
  4. 2026-10-02 16:22 UTCEPSS rescore
  5. 2026-09-30 15:12 UTCEG score recompute
  6. 2026-09-30 14:59 UTCEPSS rescore
  7. 2026-09-27 13:40 UTCEPSS rescore
  8. 2026-09-26 15:54 UTCEPSS rescore
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  1. 2026-09-06 13:44 UTCEPSS rescore
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  7. 2026-08-30 19:14 UTCEPSS rescore
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  9. 2026-08-27 14:21 UTCEPSS rescore
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  11. 2026-08-25 13:45 UTCEPSS rescore
  12. 2026-08-21 23:45 UTCEPSS rescore
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  20. 2026-08-13 21:57 UTCEPSS rescore
  21. 2026-08-12 13:47 UTCEPSS rescore
  22. 2026-08-09 13:43 UTCEPSS rescore
  23. 2026-08-08 16:33 UTCEPSS rescore
  24. 2026-08-07 16:23 UTCEPSS rescore
  25. 2026-08-06 13:43 UTCEPSS rescore
  26. 2026-08-05 19:14 UTCEPSS rescore
  27. 2026-08-04 15:06 UTCEPSS rescore
  28. 2026-08-04 10:34 UTCEPSS rescore
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  39. 2026-07-24 14:14 UTCEPSS rescore
  40. 2026-07-23 14:15 UTCEPSS rescore
  41. 2026-07-23 14:15 UTCEPSS rescore
  42. 2026-07-23 01:50 UTCEG score recompute
  43. 2026-07-22 22:35 UTCEG score recompute
  44. 2026-07-22 14:05 UTCEPSS rescore
  45. 2026-07-21 15:22 UTCEPSS rescore
  46. 2026-07-21 15:22 UTCEPSS rescore
  47. 2026-07-20 17:04 UTCEPSS rescore
  48. 2026-07-20 17:04 UTCEPSS rescore
  49. 2026-07-19 14:28 UTCEPSS rescore
  50. 2026-07-19 02:26 UTCEPSS rescore
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  52. 2026-07-18 10:02 UTCEPSS rescore
  53. 2026-07-16 16:59 UTCEPSS rescore
  54. 2026-07-15 16:55 UTCEPSS rescore
  55. 2026-07-15 01:57 UTCEPSS rescore
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  63. 2026-07-09 19:07 UTCEPSS rescore
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  65. 2026-07-07 13:43 UTCEPSS rescore
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  67. 2026-07-06 16:25 UTCEPSS rescore
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  69. 2026-07-06 02:21 UTCEPSS rescore
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  71. 2026-07-05 02:27 UTCEPSS rescore
  72. 2026-07-04 06:29 UTCEPSS rescore
  73. 2026-07-04 06:28 UTCEPSS rescore
  74. 2026-07-01 15:03 UTCEPSS rescore
  75. 2026-06-30 23:20 UTCEPSS rescore

Frequently asked(5)

What is CVE-2020-15860?
CVE-2020-15860 is a critical vulnerability published on July 24, 2020. Parallels Remote Application Server (RAS) 17.1.1 has a Business Logic Error causing remote code execution. It allows an authenticated user to execute any application in the backend operating system through the web application, despite the affected application not being published. In addition, it…
When was CVE-2020-15860 disclosed?
CVE-2020-15860 was first published on July 24, 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-2020-15860 actively exploited?
CVE-2020-15860 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 4.0% probability of exploitation in the next 30 days (90th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2020-15860?
CVE-2020-15860 has a CVSS v3 base score of 9.9 (NVD).
How do I remediate CVE-2020-15860?
No fix for CVE-2020-15860 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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