CVE-2011-2549: n/a vulnerability

CVE-2011-2549: Unspecified vulnerability in Cisco IOS XR 4.1.x before 4.1.1 on Cisco Aggregation Services Routers (ASR) 90...

Unspecified vulnerability in Cisco IOS XR 4.1.x before 4.1.1 on Cisco Aggregation Services Routers (ASR) 9000 series devices allows remote attackers to cause a denial of service (line-card reload) via an IPv4 packet, aka Bug ID CSCtr26695.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 23:08 UTC (UTC+00:00)

Security readout for executives and security teams

This issue affects Cisco ASR 9000 routers running Cisco IOS XR 4.1.x before 4.1.1. A remote IPv4 packet can make a line card reload, which may disrupt routing capacity or customer traffic. It matters most where these routers support backbone, aggregation, or customer-facing network services. Exposure is limited to Cisco ASR 9000 series routers running Cisco IOS XR 4.1.x before 4.1.1. Organizations without this platform and software train are unlikely to be affected based on the supplied sources. Prioritize remediation where affected ASR 9000 routers support critical network paths. The main business risk is service disruption from line-card reloads, not data theft. Urgency depends on whether legacy IOS XR 4.1.x remains deployed. Mitigation focus: Identify ASR 9000 routers running IOS XR 4.1.x.; Upgrade affected devices to IOS XR 4.1.1 or later per Cisco guidance.; Review Cisco advisory and Bug ID CSCtr26695 for platform-specific upgrade notes..

Prepared: Jun 27, 2026, 18:09 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Jul 28, 2011, 22:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

2Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
cisco-asr-ipv4-dos(68733)CVE reference · vdb-entry, x_refsource_XF

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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