CVE-2020-3495

CRITICALNVD 9.99.9—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.9 under NVD CVSS v3. EPSS exploit probability: 60% (99th percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Elevated
9.9EG
EchelonGraph verdictMitigate this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 60%
CISA-KEV: Not listedEPSS PROB: 60%CVSS: 9.9Exploit: Elevated riskExposed services: Not assessed

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

A vulnerability in Cisco Jabber for Windows could allow an authenticated, remote attacker to execute arbitrary code. The vulnerability is due to improper validation of message contents. An attacker could exploit this vulnerability by sending specially crafted Extensible Messaging and Presence Protocol (XMPP) messages to the affected software. A successful exploit could allow the attacker to cause the application to execute arbitrary programs on the targeted system with the privileges of the user account that is running the Cisco Jabber client software, possibly resulting in arbitrary code execution.

CVSS v3
9.9
EG Score
9.9CRITICALmedium confidence
EG Risk
69
EG Risk 69/100CISA 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%
Exploitation60% × 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
60%
EPSS %ILE
99th
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

September 4, 2020

Last Modified

November 21, 2024

Advisory Details (1)

Auto-updated Sep 30, 2026
No patch confirmed yet.
generic

Cisco Jabber for Windows Message Handling Arbitrary Code Execution Vulnerability

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-jabber-UyTKCPGg

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 4× in last 7d / 21× 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 122 total refreshes for this CVE.

  1. 2026-10-04 23:18 UTCEPSS rescore
  2. 2026-10-03 14:22 UTCEPSS rescore
  3. 2026-09-30 15:18 UTCEG score recompute
  4. 2026-09-30 14:59 UTCEPSS rescore
  5. 2026-09-27 13:41 UTCEPSS rescore
  6. 2026-09-26 15:54 UTCEPSS rescore
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  8. 2026-09-24 14:00 UTCEPSS rescore
  9. 2026-09-22 14:43 UTCEPSS rescore
  10. 2026-09-21 20:28 UTCEPSS rescore
  11. 2026-09-20 20:11 UTCEPSS rescore
  12. 2026-09-19 15:37 UTCEPSS rescore
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  17. 2026-09-12 14:57 UTCEPSS rescore
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  20. 2026-09-07 15:57 UTCEPSS rescore
  21. 2026-09-06 13:44 UTCEPSS rescore
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  24. 2026-09-02 14:08 UTCEPSS rescore
  25. 2026-08-30 19:14 UTCEPSS rescore
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  1. 2026-08-30 01:18 UTCEPSS rescore
  2. 2026-08-27 14:21 UTCEPSS rescore
  3. 2026-08-26 14:42 UTCEPSS rescore
  4. 2026-08-25 13:45 UTCEPSS rescore
  5. 2026-08-21 23:45 UTCEPSS rescore
  6. 2026-08-20 22:52 UTCEPSS rescore
  7. 2026-08-19 17:00 UTCEPSS rescore
  8. 2026-08-18 13:44 UTCEPSS rescore
  9. 2026-08-17 13:43 UTCEPSS rescore
  10. 2026-08-16 02:11 UTCEPSS rescore
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  12. 2026-08-13 21:57 UTCEPSS rescore
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  18. 2026-07-30 16:25 UTCEPSS rescore
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  20. 2026-07-28 15:33 UTCEPSS rescore
  21. 2026-07-26 14:51 UTCEPSS rescore
  22. 2026-07-25 14:15 UTCEPSS rescore
  23. 2026-07-24 14:14 UTCEPSS rescore
  24. 2026-07-23 14:15 UTCEPSS rescore
  25. 2026-07-23 14:15 UTCEPSS rescore
  26. 2026-07-23 01:53 UTCEG score recompute
  27. 2026-07-22 22:39 UTCEG score recompute
  28. 2026-07-22 14:05 UTCEPSS rescore
  29. 2026-07-21 15:22 UTCEPSS rescore
  30. 2026-07-21 15:22 UTCEPSS rescore
  31. 2026-07-20 17:04 UTCEPSS rescore
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  33. 2026-07-19 14:28 UTCEPSS rescore
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  35. 2026-07-16 16:59 UTCEPSS rescore
  36. 2026-07-15 16:55 UTCEPSS rescore
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  38. 2026-07-13 22:27 UTCEPSS rescore
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  40. 2026-07-13 06:10 UTCEPSS rescore
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  42. 2026-07-12 05:44 UTCEPSS rescore
  43. 2026-07-11 08:25 UTCEPSS rescore
  44. 2026-07-11 08:25 UTCEPSS rescore
  45. 2026-07-09 19:07 UTCEPSS rescore
  46. 2026-07-06 16:25 UTCEPSS rescore
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  48. 2026-07-04 06:29 UTCEPSS rescore
  49. 2026-07-04 06:29 UTCEPSS rescore
  50. 2026-06-28 04:54 UTCEPSS rescore
  51. 2026-06-28 04:54 UTCEPSS rescore
  52. 2026-06-27 03:06 UTCEPSS rescore
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  54. 2026-06-25 13:48 UTCEPSS rescore
  55. 2026-06-23 21:31 UTCEPSS rescore
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  57. 2026-06-21 14:54 UTCEPSS rescore
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  60. 2026-06-18 17:50 UTCEPSS rescore
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  64. 2026-06-15 17:46 UTCEPSS rescore
  65. 2026-06-14 23:15 UTCEPSS rescore
  66. 2026-06-13 22:58 UTCEPSS rescore
  67. 2026-06-12 23:10 UTCEPSS rescore
  68. 2026-06-11 13:58 UTCEPSS rescore
  69. 2026-06-10 22:16 UTCEPSS rescore
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  71. 2026-06-06 13:46 UTCEPSS rescore
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  73. 2026-06-05 22:45 UTCEPSS rescore
  74. 2026-06-05 22:45 UTCEPSS rescore
  75. 2026-06-05 06:08 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2020-3495?
CVE-2020-3495 is a critical vulnerability published on September 4, 2020. A vulnerability in Cisco Jabber for Windows could allow an authenticated, remote attacker to execute arbitrary code. The vulnerability is due to improper validation of message contents. An attacker could exploit this vulnerability by sending specially crafted Extensible Messaging and Presence…
When was CVE-2020-3495 disclosed?
CVE-2020-3495 was first published on September 4, 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-2020-3495 actively exploited?
CVE-2020-3495 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 60% probability of exploitation in the next 30 days (99th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2020-3495?
CVE-2020-3495 has a CVSS v3 base score of 9.9 (NVD).
How do I remediate CVE-2020-3495?
No fix for CVE-2020-3495 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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