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: 4%CVSS: 9.8Exploit: cisa kev · ssvc activeExposed: 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
4%
EPSS %ILE
90%
KEV
⚠ Exploited

Published

January 21, 2026

Last Modified

June 17, 2026

Advisory Details (2)

Auto-updated Jul 27, 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 53× in last 7d / 230× 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 496 total refreshes for this CVE.

  1. 2026-08-01 04:15 UTCEPSS rescore
  2. 2026-08-01 03:50 UTCGHSA enrichment
  3. 2026-07-31 23:54 UTCGHSA enrichment
  4. 2026-07-31 19:56 UTCGHSA enrichment
  5. 2026-07-31 15:59 UTCGHSA enrichment
  6. 2026-07-31 12:01 UTCGHSA enrichment
  7. 2026-07-31 08:05 UTCGHSA enrichment
  8. 2026-07-31 04:08 UTCGHSA enrichment
  9. 2026-07-31 00:10 UTCGHSA enrichment
  10. 2026-07-30 20:12 UTCEG score recompute
  11. 2026-07-30 20:12 UTCGHSA enrichment
  12. 2026-07-30 16:15 UTCGHSA enrichment
  13. 2026-07-30 12:19 UTCEG score recompute
  14. 2026-07-30 12:19 UTCGHSA enrichment
  15. 2026-07-30 08:23 UTCGHSA enrichment
  16. 2026-07-30 04:27 UTCEG score recompute
  17. 2026-07-30 04:27 UTCGHSA enrichment
  18. 2026-07-30 01:30 UTCEPSS rescore
  19. 2026-07-30 00:30 UTCGHSA enrichment
  20. 2026-07-29 20:32 UTCGHSA enrichment
  21. 2026-07-29 19:27 UTCCISA KEV update
  22. 2026-07-29 16:35 UTCGHSA enrichment
  23. 2026-07-29 12:38 UTCGHSA enrichment
  24. 2026-07-29 08:41 UTCGHSA enrichment
  25. 2026-07-29 04:44 UTCGHSA enrichment
Show 75 more
  1. 2026-07-29 00:48 UTCGHSA enrichment
  2. 2026-07-28 20:51 UTCGHSA enrichment
  3. 2026-07-28 16:53 UTCEG score recompute
  4. 2026-07-28 16:53 UTCGHSA enrichment
  5. 2026-07-28 12:57 UTCGHSA enrichment
  6. 2026-07-28 09:00 UTCGHSA enrichment
  7. 2026-07-28 05:04 UTCGHSA enrichment
  8. 2026-07-28 01:05 UTCGHSA enrichment
  9. 2026-07-27 21:08 UTCGHSA enrichment
  10. 2026-07-27 19:24 UTCCISA KEV update
  11. 2026-07-27 17:17 UTCCISA KEV update
  12. 2026-07-27 17:12 UTCEG score recompute▲ 0.80
  13. 2026-07-27 17:11 UTCGHSA enrichment
  14. 2026-07-27 14:13 UTCEPSS rescore
  15. 2026-07-27 13:14 UTCGHSA enrichment
  16. 2026-07-27 09:17 UTCGHSA enrichment
  17. 2026-07-27 05:21 UTCGHSA enrichment
  18. 2026-07-27 01:19 UTCGHSA enrichment
  19. 2026-07-26 21:23 UTCGHSA enrichment
  20. 2026-07-26 17:26 UTCGHSA enrichment
  21. 2026-07-26 13:30 UTCEG score recompute
  22. 2026-07-26 13:30 UTCGHSA enrichment
  23. 2026-07-26 09:32 UTCGHSA enrichment
  24. 2026-07-26 05:36 UTCGHSA enrichment
  25. 2026-07-26 01:40 UTCEG score recompute
  26. 2026-07-26 01:40 UTCGHSA enrichment
  27. 2026-07-25 14:17 UTCEPSS rescore
  28. 2026-07-25 14:17 UTCEPSS rescore
  29. 2026-07-24 14:17 UTCEPSS rescore
  30. 2026-07-23 14:18 UTCEPSS rescore
  31. 2026-07-23 14:18 UTCEPSS rescore
  32. 2026-07-23 03:06 UTCEG score recompute
  33. 2026-07-22 20:33 UTCGHSA enrichment
  34. 2026-07-22 19:40 UTCCISA KEV update
  35. 2026-07-22 16:36 UTCEG score recompute
  36. 2026-07-22 16:35 UTCGHSA enrichment
  37. 2026-07-22 14:08 UTCEPSS rescore
  38. 2026-07-22 12:38 UTCGHSA enrichment
  39. 2026-07-22 08:41 UTCGHSA enrichment
  40. 2026-07-22 04:44 UTCGHSA enrichment
  41. 2026-07-22 00:46 UTCGHSA enrichment
  42. 2026-07-21 20:49 UTCGHSA enrichment
  43. 2026-07-21 16:52 UTCEG score recompute
  44. 2026-07-21 16:52 UTCGHSA enrichment
  45. 2026-07-21 15:24 UTCEPSS rescore
  46. 2026-07-21 15:24 UTCEPSS rescore
  47. 2026-07-21 14:37 UTCCISA KEV update
  48. 2026-07-21 12:55 UTCGHSA enrichment
  49. 2026-07-21 08:59 UTCGHSA enrichment
  50. 2026-07-21 05:02 UTCGHSA enrichment
  51. 2026-07-21 01:05 UTCGHSA enrichment
  52. 2026-07-20 21:10 UTCGHSA enrichment
  53. 2026-07-20 17:12 UTCEG score recompute
  54. 2026-07-20 17:12 UTCGHSA enrichment
  55. 2026-07-20 17:08 UTCEPSS rescore
  56. 2026-07-20 13:14 UTCGHSA enrichment
  57. 2026-07-20 09:18 UTCGHSA enrichment
  58. 2026-07-20 05:22 UTCGHSA enrichment
  59. 2026-07-20 01:26 UTCGHSA enrichment
  60. 2026-07-19 21:29 UTCGHSA enrichment
  61. 2026-07-19 17:33 UTCEG score recompute
  62. 2026-07-19 17:33 UTCGHSA enrichment
  63. 2026-07-19 14:31 UTCEPSS rescore
  64. 2026-07-19 14:31 UTCEPSS rescore
  65. 2026-07-19 13:37 UTCGHSA enrichment
  66. 2026-07-19 09:41 UTCGHSA enrichment
  67. 2026-07-19 05:45 UTCEG score recompute
  68. 2026-07-19 05:45 UTCGHSA enrichment
  69. 2026-07-19 02:29 UTCEPSS rescore
  70. 2026-07-19 02:28 UTCEPSS rescore
  71. 2026-07-19 01:48 UTCGHSA enrichment
  72. 2026-07-18 21:52 UTCGHSA enrichment
  73. 2026-07-18 17:56 UTCGHSA enrichment
  74. 2026-07-18 14:00 UTCEG score recompute
  75. 2026-07-18 14:00 UTCGHSA enrichment

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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.

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