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01 Record

CVE-2026-76505

Cisco IOS XR Software for ASR 9000 Series Routers IPv4 Unicast Packets Denial of Service Vulnerability

HighPUBLISHEDCNA: cisco
CNA base score7.5 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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02 Description

Cisco IOS XR Software for ASR 9000 Series Routers IPv4 Unicast Packets Denial of Service Vulnerability

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.46% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 40.2% of scored records. A rank, not a probability.
NVD base score
7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD analysis status
Awaiting Analysis. NVD last modified this record on 2026-10-22.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-10-21 16:18Z8 DAYS AGO
Last updated
2026-10-22 13:37Z7 DAYS AGO
Reserved
2026-08-19
Assigning CNA
cisco
Record state
PUBLISHED
Severity
High (CVSS 7.5)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses
  • CWE-20Improper Input ValidationClass
Data version
5.2
Document digest
eb1c376991e228a1430c65a881bee87979778505c59049d9e1bfd56b04ad3e7f

05 Affected products

VendorProductVersionsPlatforms
CiscoCisco IOS XR Software7.0.1, 7.1.1, 7.0.90, 6.7.1, 7.0.2, 7.1.15, 7.1.2, 6.7.2, 7.1.25, 7.1.3, 6.7.3, 7.3.1, 7.4.1, 6.8.1, 7.3.2, 7.5.1, 7.6.1, 7.5.2, 7.3.3, 6.8.2, 7.7.1, 7.4.2, 7.3.4, 6.7.35, 6.9.1, 7.6.2, 7.8.1, 7.5.3, 7.7.2, 6.9.2, 7.9.1, 7.8.2, 7.5.4, 7.8.22, 7.10.1, 7.9.2, 7.3.5, 7.5.5, 7.11.1, 7.9.21, 7.10.2, 24.1.1, 7.11.2, 24.2.1, 24.1.2, 24.3.1, 24.4.1, 24.2.2, 7.8.23, 7.11.21, 24.3.2, 24.3.20, 24.3.30—

06 References