CVE-2026-20046

Administrative takeover via misassigned CLI task groups

Published Mar 11, 2026 · Updated Mar 11, 2026

Privilege escalation in Cisco IOS XR Software on IOS XRv 9000 Routers allows local users to gain full administrative control. The source code maps an undisclosed CLI command to incorrect task groups, so task group–based authorization checks are bypassed. A low-privileged account and local CLI access are required; successful exploitation permits device actions without authorization checks.

CVSS severity8.8
High
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Privilege escalation in Cisco IOS XR Software on IOS XRv 9000 Routers allows local users to gain full administrative control. The source code maps an undisclosed CLI command to incorrect task groups, so task group–based authorization checks are bypassed. A low-privileged account and local CLI access are required; successful exploitation permits device actions without authorization checks.

The record

CVE
CVE-2026-20046
Published
Mar 11, 2026
Updated
Mar 11, 2026
Vendor
ClamAV
Product
Cisco IOS XR Software
Classifications
CWE-264, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=24.1.1
  2. Affected versionversion=24.1.2
  3. Affected versionversion=24.2.1
  4. Affected versionversion=24.2.2
  5. Affected versionversion=24.2.20
  6. Affected versionversion=24.2.21
  7. Affected versionversion=24.3.1
  8. Affected versionversion=24.3.2
  9. Affected versionversion=24.3.20
  10. Affected versionversion=24.3.30
  11. Affected versionversion=24.4.1
  12. Affected versionversion=24.4.2
  13. Affected versionversion=25.1.1
  14. Affected versionversion=25.1.2
  15. Affected versionversion=25.1.30
  16. Affected versionversion=25.2.1
  17. Affected versionversion=6.5.1
  18. Affected versionversion=6.5.2
  19. Affected versionversion=6.5.3
  20. Affected versionversion=6.6.1
  21. Affected versionversion=6.6.2
  22. Affected versionversion=6.6.25
  23. Affected versionversion=6.6.3
  24. Affected versionversion=6.6.4
  25. Affected versionversion=7.0.1
  26. Affected versionversion=7.0.2
  27. Affected versionversion=7.0.90
  28. Affected versionversion=7.10.1
  29. Affected versionversion=7.10.2
  30. Affected versionversion=7.1.1
  31. Affected versionversion=7.11.1
  32. Affected versionversion=7.11.2
  33. Affected versionversion=7.11.21
  34. Affected versionversion=7.1.2
  35. Affected versionversion=7.2.1
  36. Affected versionversion=7.2.2
  37. Affected versionversion=7.3.1
  38. Affected versionversion=7.3.2
  39. Affected versionversion=7.3.3
  40. Affected versionversion=7.3.4
  41. Affected versionversion=7.3.6
  42. Affected versionversion=7.4.1
  43. Affected versionversion=7.4.2
  44. Affected versionversion=7.5.1
  45. Affected versionversion=7.5.2
  46. Affected versionversion=7.5.4
  47. Affected versionversion=7.5.5
  48. Affected versionversion=7.6.1
  49. Affected versionversion=7.6.2
  50. Affected versionversion=7.7.1
  51. Affected versionversion=7.7.2
  52. Affected versionversion=7.7.21
  53. Affected versionversion=7.8.1
  54. Affected versionversion=7.8.2
  55. Affected versionversion=7.8.22
  56. Affected versionversion=7.9.1
  57. Affected versionversion=7.9.2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

ClamAV · Cisco IOS XR Softwareversion=24.1.1; version=24.1.2; version=24.2.1; version=24.2.2; version=24.2.20; version=24.2.21; version=24.3.1; version=24.3.2; version=24.3.20; version=24.3.30; version=24.4.1; version=24.4.2; version=25.1.1; version=25.1.2; version=25.1.30; version=25.2.1; version=6.5.1; version=6.5.2; version=6.5.3; version=6.6.1; version=6.6.2; version=6.6.25; version=6.6.3; version=6.6.4; version=7.0.1; version=7.0.2; version=7.0.90; version=7.10.1; version=7.10.2; version=7.1.1; version=7.11.1; version=7.11.2; version=7.11.21; version=7.1.2; version=7.2.1; version=7.2.2; version=7.3.1; version=7.3.2; version=7.3.3; version=7.3.4; version=7.3.6; version=7.4.1; version=7.4.2; version=7.5.1; version=7.5.2; version=7.5.4; version=7.5.5; version=7.6.1; version=7.6.2; version=7.7.1; version=7.7.2; version=7.7.21; version=7.8.1; version=7.8.2; version=7.8.22; version=7.9.1; version=7.9.2

Published CVSS scores

8.8Cisco Systems, Inc.CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-264Permissions, Privileges, and Access Controls
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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