CVE-2026-20045

CRITICALNVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score elevated to 9.8 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2026-01-21), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 9.8 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 4 sources updated this weekExploited in the wild
9.8EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 5%CVSS: 9.8Exploit: cisa kev · ssvc active · public exploitExposed: 0

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

A vulnerability in Cisco Unified Communications Manager (Unified CM), Cisco Unified Communications Manager Session Management Edition (Unified CM SME), Cisco Unified Communications Manager IM & Presence Service (Unified CM IM&P), Cisco Unity Connection, and Cisco Webex Calling Dedicated Instance could allow an unauthenticated, remote attacker to execute arbitrary commands on the underlying operating system of an affected device.  This vulnerability is due to improper validation of user-supplied input in HTTP requests. An attacker could exploit this vulnerability by sending a sequence of crafted HTTP requests to the web-based management interface of an affected device. A successful exploit could allow the attacker to obtain user-level access to the underlying operating system and then elevate privileges to root.  Note: Cisco has assigned this security advisory a Security Impact Rating (SIR) of Critical rather than High as the score indicates. The reason is that exploitation of this vulnerability could result in an attacker elevating privileges to root.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
99(Act)
EG Risk 99/100SSVC: Act

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
Severity98% × 45%
Exploitation100% × 40%
Automatability100% × 15%
Action: Fix now — active exploitation, automatable, high impact.
EPSS PROB
5%
EPSS %ILE
91%
KEV
⚠ Exploited

Published

January 21, 2026

Last Modified

June 17, 2026

Advisory Details (2)

Auto-updated Sep 21, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: cisa.
cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20045
generic🔴 Active Exploitation

Cisco Unified Communications Products Remote Code Execution Vulnerability

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-voice-rce-mORhqY4b

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 57× in last 7d / 247× 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 933 total refreshes for this CVE.

  1. 2026-09-22 13:56 UTCGHSA enrichment
  2. 2026-09-22 09:59 UTCGHSA enrichment
  3. 2026-09-22 06:03 UTCGHSA enrichment
  4. 2026-09-22 02:07 UTCGHSA enrichment
  5. 2026-09-21 22:09 UTCEG score recompute
  6. 2026-09-21 22:08 UTCGHSA enrichment
  7. 2026-09-21 19:09 UTCCISA KEV update
  8. 2026-09-21 18:11 UTCGHSA enrichment
  9. 2026-09-21 14:15 UTCGHSA enrichment
  10. 2026-09-21 10:19 UTCGHSA enrichment
  11. 2026-09-21 06:23 UTCGHSA enrichment
  12. 2026-09-21 02:27 UTCGHSA enrichment
  13. 2026-09-20 22:30 UTCEG score recompute
  14. 2026-09-20 22:30 UTCGHSA enrichment
  15. 2026-09-20 20:15 UTCEPSS rescore
  16. 2026-09-20 18:34 UTCGHSA enrichment
  17. 2026-09-20 14:38 UTCGHSA enrichment
  18. 2026-09-20 10:38 UTCGHSA enrichment
  19. 2026-09-20 06:41 UTCGHSA enrichment
  20. 2026-09-20 02:42 UTCGHSA enrichment
  21. 2026-09-19 22:46 UTCGHSA enrichment
  22. 2026-09-19 18:49 UTCEG score recompute
  23. 2026-09-19 18:49 UTCGHSA enrichment
  24. 2026-09-19 14:53 UTCGHSA enrichment
  25. 2026-09-19 10:55 UTCGHSA enrichment
Show 75 more
  1. 2026-09-19 06:59 UTCGHSA enrichment
  2. 2026-09-19 03:03 UTCGHSA enrichment
  3. 2026-09-18 23:07 UTCEG score recompute
  4. 2026-09-18 23:07 UTCGHSA enrichment
  5. 2026-09-18 19:27 UTCEPSS rescore
  6. 2026-09-18 19:20 UTCCISA KEV update
  7. 2026-09-18 19:10 UTCGHSA enrichment
  8. 2026-09-18 15:14 UTCGHSA enrichment
  9. 2026-09-18 14:15 UTCCISA KEV update
  10. 2026-09-18 11:18 UTCGHSA enrichment
  11. 2026-09-18 07:22 UTCGHSA enrichment
  12. 2026-09-18 03:26 UTCGHSA enrichment
  13. 2026-09-17 23:30 UTCGHSA enrichment
  14. 2026-09-17 19:34 UTCEG score recompute
  15. 2026-09-17 19:34 UTCGHSA enrichment
  16. 2026-09-17 15:38 UTCGHSA enrichment
  17. 2026-09-17 11:42 UTCGHSA enrichment
  18. 2026-09-17 07:46 UTCGHSA enrichment
  19. 2026-09-17 03:50 UTCGHSA enrichment
  20. 2026-09-16 23:54 UTCGHSA enrichment
  21. 2026-09-16 19:57 UTCGHSA enrichment
  22. 2026-09-16 16:01 UTCEG score recompute
  23. 2026-09-16 16:01 UTCGHSA enrichment
  24. 2026-09-16 14:10 UTCCISA KEV update
  25. 2026-09-16 14:07 UTCEPSS rescore
  26. 2026-09-16 12:05 UTCGHSA enrichment
  27. 2026-09-16 08:09 UTCEG score recompute
  28. 2026-09-16 08:08 UTCGHSA enrichment
  29. 2026-09-16 05:14 UTCEPSS rescore
  30. 2026-09-16 04:11 UTCGHSA enrichment
  31. 2026-09-16 00:14 UTCGHSA enrichment
  32. 2026-09-15 20:18 UTCGHSA enrichment
  33. 2026-09-15 16:21 UTCGHSA enrichment
  34. 2026-09-15 12:24 UTCGHSA enrichment
  35. 2026-09-15 08:28 UTCGHSA enrichment
  36. 2026-09-15 04:31 UTCEG score recompute
  37. 2026-09-15 04:31 UTCGHSA enrichment
  38. 2026-09-15 00:34 UTCGHSA enrichment
  39. 2026-09-14 20:38 UTCGHSA enrichment
  40. 2026-09-14 19:24 UTCCISA KEV update
  41. 2026-09-14 16:42 UTCGHSA enrichment
  42. 2026-09-14 12:46 UTCGHSA enrichment
  43. 2026-09-14 08:50 UTCGHSA enrichment
  44. 2026-09-14 04:54 UTCGHSA enrichment
  45. 2026-09-14 00:58 UTCGHSA enrichment
  46. 2026-09-13 21:02 UTCGHSA enrichment
  47. 2026-09-13 17:06 UTCGHSA enrichment
  48. 2026-09-13 13:09 UTCGHSA enrichment
  49. 2026-09-13 09:13 UTCGHSA enrichment
  50. 2026-09-13 05:17 UTCGHSA enrichment
  51. 2026-09-13 01:21 UTCGHSA enrichment
  52. 2026-09-12 21:25 UTCGHSA enrichment
  53. 2026-09-12 17:28 UTCEG score recompute
  54. 2026-09-12 17:28 UTCGHSA enrichment
  55. 2026-09-12 15:00 UTCEPSS rescore
  56. 2026-09-12 13:32 UTCGHSA enrichment
  57. 2026-09-12 09:36 UTCGHSA enrichment
  58. 2026-09-12 05:40 UTCGHSA enrichment
  59. 2026-09-12 01:44 UTCGHSA enrichment
  60. 2026-09-11 21:48 UTCGHSA enrichment
  61. 2026-09-11 18:49 UTCCISA KEV update
  62. 2026-09-11 17:52 UTCEG score recompute
  63. 2026-09-11 17:52 UTCGHSA enrichment
  64. 2026-09-11 14:52 UTCEPSS rescore
  65. 2026-09-11 13:55 UTCGHSA enrichment
  66. 2026-09-11 09:59 UTCEG score recompute
  67. 2026-09-11 09:58 UTCGHSA enrichment
  68. 2026-09-11 09:36 UTCEPSS rescore
  69. 2026-09-11 06:01 UTCGHSA enrichment
  70. 2026-09-11 02:04 UTCGHSA enrichment
  71. 2026-09-10 22:08 UTCGHSA enrichment
  72. 2026-09-10 19:28 UTCCISA KEV update
  73. 2026-09-10 18:11 UTCGHSA enrichment
  74. 2026-09-10 14:14 UTCGHSA enrichment
  75. 2026-09-10 10:17 UTCEG score recompute

Publicly available exploits

(1 reference)

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

  • GitHub PoCdkstar11q/Ashwesker-CVE-2026-20045
    First seen Jan 25, 2026

    CVE-2026-20045

    Open source ↗

Related CVEs(same CWE)

Frequently asked(6)

What is CVE-2026-20045?
CVE-2026-20045 is a critical vulnerability published on January 21, 2026. A vulnerability in Cisco Unified Communications Manager (Unified CM), Cisco Unified Communications Manager Session Management Edition (Unified CM SME), Cisco Unified Communications Manager IM & Presence Service (Unified CM IM&P), Cisco Unity Connection, and Cisco Webex Calling Dedicated…
When was CVE-2026-20045 disclosed?
CVE-2026-20045 was first published in the National Vulnerability Database on January 21, 2026, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-20045 actively exploited?
Yes. CISA added CVE-2026-20045 to the Known Exploited Vulnerabilities catalog on January 21, 2026, affecting Cisco Unified Communications Manager. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2026-20045?
CVE-2026-20045 has a CVSS v3 base score of 9.8 (NVD).
Which products are affected by CVE-2026-20045?
CVE-2026-20045 affects Cisco Unified Communications Manager. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2026-20045?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-20045, 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.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-20045

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