Read the docs
TI-2020-02916 Aliases CVE-2020-3364GHSA-h32p-cwph-5qx4

Improper access control in Cisco IOS XR Software

Priority LOW 32CWE-284Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
None · Low · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-284.

Summary

A vulnerability in the access control list (ACL) functionality of the standby route processor management interface of Cisco IOS XR Software could allow an unauthenticated, remote attacker to reach the configured IP addresses on the standby route processor management Gigabit Ethernet Management interface. The vulnerability is due to a logic error that was introduced in the Cisco IOS XR Software, which prevents the ACL from working when applied against the standby route processor management interface. An attacker could exploit this vulnerability by attempting to access the device through the standby route processor management interface.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00914 60th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
CiscoCisco IOS XR Softwareall versions—No fix listedCNA
  • Cisco IOS XR Software VendorCisco Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 6

CPEVersionsRoleVendor
cpe:2.3:o:cisco:ios_xr:6.7.1:*:*:*:*:*:*:*6.7.1VulnerableCisco
cpe:2.3:o:cisco:ios_xr:7.0.2:*:*:*:*:*:*:*7.0.2VulnerableCisco
cpe:2.3:o:cisco:ios_xr:7.0.11:*:*:*:*:*:*:*7.0.11VulnerableCisco
cpe:2.3:o:cisco:ios_xr:7.0.12:*:*:*:*:*:*:*7.0.12VulnerableCisco
cpe:2.3:o:cisco:ios_xr:7.1.1:*:*:*:*:*:*:*7.1.1VulnerableCisco
cpe:2.3:o:cisco:ios_xr:7.1.15:*:*:*:*:*:*:*7.1.15VulnerableCisco
  • cpe:2.3:o:cisco:ios_xr:6.7.1:*:*:*:*:*:*:* Versions 6.7.1 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:7.0.2:*:*:*:*:*:*:* Versions 7.0.2 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:7.0.11:*:*:*:*:*:*:* Versions 7.0.11 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:7.0.12:*:*:*:*:*:*:* Versions 7.0.12 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:7.1.1:*:*:*:*:*:*:* Versions 7.1.1 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:7.1.15:*:*:*:*:*:*:* Versions 7.1.15 Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-3364
  2. 2026-10-03 Alias added: GHSA-h32p-cwph-5qx4

References

Advisory 1

  • TI-2020-02680 Cisco IOS XR Software Cisco Discovery Protocol Format String Vulnerability KEVCVSS 3.1HIGH 8.8
  • TI-2018-00135 Memory corruption in Cisco IOS, IOS XE, and IOS XR KEVCVSS 3.1HIGH 8.8
  • TI-2020-03113 Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerabilities KEVCVSS 3.1HIGH 8.6
  • TI-2020-03110 Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerability KEVCVSS 3.1HIGH 8.6
  • TI-2018-00142 Memory corruption in Cisco IOS, IOS XE, and IOS XR KEVCVSS 3.1HIGH 8.0
  • TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
See all 199 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences