How severe is CVE-2016-1361?

CVE-2016-1361 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over an adjacent network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2016-1361 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-1361?

CVE-2016-1361 primarily affects Cisco Ios Xr. In total, 34 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2016-1361?

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

When was CVE-2016-1361 published?

CVE-2016-1361 was published on 2016-03-12 and last updated on 2026-06-17.

CVE-2016-1361

CVE-2016-1361 is a medium-severity vulnerability in Cisco Ios Xr with a CVSS 3.x base score of 5.3. 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: Medium (CVSS 3.x base score 5.3)
CVSS v2: 4.6
EPSS exploit prediction: 1% (50th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-399
Affected product: Cisco Ios Xr
Published: 2016-03-12
Last modified: 2026-06-17

Description

Cisco IOS XR through 4.3.2 on Gigabit Switch Router (GSR) 12000 devices does not properly check for a Bidirectional Forwarding Detection (BFD) header in a UDP packet, which allows remote attackers to cause a denial of service (line-card restart) via a crafted packet, aka Bug ID CSCuw56900.

Frequently asked questions

What is CVE-2016-1361?: Cisco IOS XR through 4.3.2 on Gigabit Switch Router (GSR) 12000 devices does not properly check for a Bidirectional Forwarding Detection (BFD) header in a UDP packet, which allows remote attackers to cause a denial of service (line-card restart) via a crafted packet, aka Bug ID CSCuw56900.
How severe is CVE-2016-1361?: CVE-2016-1361 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over an adjacent network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2016-1361 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-1361?: CVE-2016-1361 primarily affects Cisco Ios Xr. In total, 34 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2016-1361?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2016-1361 published?: CVE-2016-1361 was published on 2016-03-12 and last updated on 2026-06-17.

References

Affected products (34)

cpe:2.3:o:cisco:ios_xr:3.3.3:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:3.4.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:3.4.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:3.4.3:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:3.5.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:3.5.3:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:3.5.4:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:3.6.0:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:3.6.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:3.6.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:3.6.3:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:3.7.0:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:3.7.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:3.8.0:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:3.8.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:3.8.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:3.8.4:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:3.9.0:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:3.9.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:3.9.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:4.0.0:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:4.0.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:4.0.3:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:4.1.0:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:4.1.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:4.1.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:4.2.0:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:4.2.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:4.2.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:4.2.3:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:4.2.4:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:4.3.0:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:4.3.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:4.3.2:*:*:*:*:*:*:*

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