How severe is CVE-2011-3283?

CVE-2011-3283 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2011-3283 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-3283?

CVE-2011-3283 affects Cisco Carrier Routing System. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2011-3283?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2011-3283 published?

CVE-2011-3283 was published on 2012-05-02 and last updated on 2026-06-16.

CVE-2011-3283

CVE-2011-3283 is a medium-severity vulnerability in Cisco Carrier Routing System with a CVSS 2.0 base score of 5.0. 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-20.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 2% (72nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Cisco Carrier Routing System
Published: 2012-05-02
Last modified: 2026-06-16

Description

Cisco Carrier Routing System 3.9.1 allows remote attackers to cause a denial of service (Metro subsystem crash) via a fragmented GRE packet, aka Bug ID CSCts14887.

Frequently asked questions

What is CVE-2011-3283?: Cisco Carrier Routing System 3.9.1 allows remote attackers to cause a denial of service (Metro subsystem crash) via a fragmented GRE packet, aka Bug ID CSCts14887.
How severe is CVE-2011-3283?: CVE-2011-3283 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2011-3283 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-3283?: CVE-2011-3283 affects Cisco Carrier Routing System. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2011-3283?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-3283 published?: CVE-2011-3283 was published on 2012-05-02 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:cisco:carrier_routing_system:3.9.1:*:*:*:*:*:*:*

More vulnerabilities in Cisco Carrier Routing System

CVE-2018-0132 — High (CVSS 8.6): A vulnerability in the forwarding information base (FIB) code of Cisco IOS XR Software could allow an unauthenticated,…
CVE-2019-1918 — High (CVSS 7.4): A vulnerability in the implementation of Intermediate System–to–Intermediate System (IS–IS) routing…
CVE-2019-1910 — High (CVSS 7.4): A vulnerability in the implementation of the Intermediate System–to–Intermediate System (IS–IS)…
CVE-2015-0618 — High (CVSS 7.1): Cisco IOS XR 5.0.1 and 5.2.1 on Network Convergence System (NCS) 6000 devices and 5.1.3 and 5.1.4 on Carrier Routing…
CVE-2012-1342 — Medium (CVSS 5.8): Cisco Carrier Routing System (CRS) 3.9, 4.0, and 4.1 allows remote attackers to bypass ACL entries via fragmented…
CVE-2016-6401 — Medium (CVSS 5.3): Cisco Carrier Routing System (CRS) 5.1 and 5.1.4, as used in CRS Carrier Grade Services for CRS-1 and CRS-3 devices,…

All CVEs affecting Cisco Carrier Routing System →

Other CWE-20 (Improper Input Validation) vulnerabilities

CVE-2026-48316 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48281 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48277 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48055 — Critical (CVSS 10.0): Streambert is a cross-platform Electron Desktop App to stream and download any video media. In versions 2.4.0 and…
CVE-2026-34910 — Critical (CVSS 10.0): A malicious actor with access to the network could exploit an Improper Input Validation vulnerability found in UniFi OS…
CVE-2026-33587 — Critical (CVSS 10.0): Lack of user input sanitisation in Open Notebook v1.8.3 allows the application user to execute Python code (and…

Browse all CWE-20 (Improper Input Validation) vulnerabilities →