How severe is CVE-2016-1407?

CVE-2016-1407 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2016-1407 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-1407?

CVE-2016-1407 primarily affects Cisco Ios Xr. In total, 79 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2016-1407?

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-2016-1407 published?

CVE-2016-1407 was published on 2016-05-25 and last updated on 2026-06-17.

CVE-2016-1407

CVE-2016-1407 is a high-severity vulnerability in Cisco Ios Xr with a CVSS 3.x base score of 7.5. 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: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (75th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Cisco Ios Xr
Published: 2016-05-25
Last modified: 2026-06-17

Description

Cisco IOS XR through 5.3.2 mishandles Local Packet Transport Services (LPTS) flow-base entries, which allows remote attackers to cause a denial of service (session drop) by making many connection attempts to open TCP ports, aka Bug ID CSCux95576.

Frequently asked questions

What is CVE-2016-1407?: Cisco IOS XR through 5.3.2 mishandles Local Packet Transport Services (LPTS) flow-base entries, which allows remote attackers to cause a denial of service (session drop) by making many connection attempts to open TCP ports, aka Bug ID CSCux95576.
How severe is CVE-2016-1407?: CVE-2016-1407 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2016-1407 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-1407?: CVE-2016-1407 primarily affects Cisco Ios Xr. In total, 79 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2016-1407?: 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-2016-1407 published?: CVE-2016-1407 was published on 2016-05-25 and last updated on 2026-06-17.

References

Affected products (79)

cpe:2.3:o:cisco:ios_xr:2.0.0:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:3.0.0:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:3.0.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:3.2.0:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:3.2.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:3.2.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:3.2.3:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:3.2.4:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:3.2.6:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:3.2.50:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:3.3.0:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:3.3.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:3.3.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:3.3.3:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:3.3.4:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:3.4.0:*:*:*:*:*:*:*
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:3.5.0:*:*:*:*:*:*:*
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:3.6_base:*:*:*:*:*:*:*
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:3.7.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:3.7.3:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:3.7_base:*:*:*:*:*:*:*
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:3.8.3:*:*:*:*:*:*:*
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:*:*:*:*:*:*:*

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