CVE-2011-0943
CVE-2011-0943 is a high-severity vulnerability in Cisco Ios Xr with a CVSS 2.0 base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-399.
Key facts
- Severity: High (CVSS 2.0 base score 7.8)
- EPSS exploit prediction: 1% (65th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-399
- Affected product: Cisco Ios Xr
- Published:
- Last modified:
Description
Cisco IOS XR 3.8.3, 3.8.4, and 3.9.1 allows remote attackers to cause a denial of service (NetIO process restart or device reload) via a crafted IPv4 packet, aka Bug ID CSCth44147.
Frequently asked questions
- What is CVE-2011-0943?
- Cisco IOS XR 3.8.3, 3.8.4, and 3.9.1 allows remote attackers to cause a denial of service (NetIO process restart or device reload) via a crafted IPv4 packet, aka Bug ID CSCth44147.
- How severe is CVE-2011-0943?
- CVE-2011-0943 has a CVSS 2.0 base score of 7.8, rated high severity.
- Is CVE-2011-0943 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2011-0943?
- CVE-2011-0943 primarily affects Cisco Ios Xr. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2011-0943?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2011-0943 published?
- CVE-2011-0943 was published on 2011-05-31 and last updated on 2026-06-16.
References
Affected products (3)
- cpe:2.3:o:cisco:ios_xr:3.8.3:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:ios_xr:3.8.4:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:ios_xr:3.9.1:*:*:*:*:*:*:*
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