CVE-2026-20230

CRITICALPre-NVD 8.69.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2026-06-25), indicating real-world exploitation has been confirmed by US federal agencies. a secondary CVSS source baseline 8.6 retained for reference (NVD's own analysis pending). Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, secondary
Trending — 4 sources updated this weekExploited in the wild
9.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 81%CVSS: 8.6Exploit: cisa kev · epss top5pct · epss highExposed: 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) and Cisco Unified Communications Manager Session Management Edition (Unified CM SME) could allow an unauthenticated, remote attacker to conduct server-side request forgery (SSRF) attacks through an affected device. This vulnerability is due to improper input validation for specific HTTP requests. An attacker could exploit this vulnerability by sending a crafted HTTP request to an affected device. A successful exploit could allow the attacker to write files to the underlying operating system that could be used later to elevate 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. Note: To exploit this vulnerability, the WebDialer service must be enabled. WebDialer is disabled by default.

CVSS v3
8.6
EG Score
9.0(high)
EG Risk
81(Attend)
EG Risk 81/100SSVC: Attend

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%
Exploitation100% × 40%
Automatability0% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
81%
EPSS %ILE
100%
KEV
⚠ Exploited

Published

June 3, 2026

Last Modified

July 22, 2026

Advisory Details (1)

Auto-updated Jun 3, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

Cisco Unified Communications Manager Server-Side Request Forgery Vulnerability

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cucm-ssrf-cXPnHcW

Vendor Advisories for CVE-2026-20230(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 57× in last 7d / 229× 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 309 total refreshes for this CVE.

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

Frequently asked(6)

What is CVE-2026-20230?
CVE-2026-20230 is a critical vulnerability published on June 3, 2026. A vulnerability in Cisco Unified Communications Manager (Unified CM) and Cisco Unified Communications Manager Session Management Edition (Unified CM SME) could allow an unauthenticated, remote attacker to conduct server-side request forgery (SSRF) attacks through an affected device. This…
When was CVE-2026-20230 disclosed?
CVE-2026-20230 was first published in the National Vulnerability Database on June 3, 2026, with the most recent update on July 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-20230 actively exploited?
Yes. CISA added CVE-2026-20230 to the Known Exploited Vulnerabilities catalog on June 25, 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-2026-20230?
CVE-2026-20230 has a CVSS v3 base score of 8.6 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2026-20230?
CVE-2026-20230 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-2026-20230?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-20230, 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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