How severe is CVE-2016-1348?

CVE-2016-1348 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-2016-1348 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-1348?

CVE-2016-1348 primarily affects Cisco Ios Xe. In total, 82 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2016-1348?

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-2016-1348 published?

CVE-2016-1348 was published on 2016-03-26 and last updated on 2026-06-17.

CVE-2016-1348

CVE-2016-1348 is a high-severity vulnerability in Cisco Ios Xe 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-399.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 7.8
EPSS exploit prediction: 2% (78th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-399
Affected product: Cisco Ios Xe
Published: 2016-03-26
Last modified: 2026-06-17

Description

Cisco IOS 15.0 through 15.5 and IOS XE 3.3 through 3.16 allow remote attackers to cause a denial of service (device reload) via a crafted DHCPv6 Relay message, aka Bug ID CSCus55821.

Frequently asked questions

What is CVE-2016-1348?: Cisco IOS 15.0 through 15.5 and IOS XE 3.3 through 3.16 allow remote attackers to cause a denial of service (device reload) via a crafted DHCPv6 Relay message, aka Bug ID CSCus55821.
How severe is CVE-2016-1348?: CVE-2016-1348 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-2016-1348 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-1348?: CVE-2016-1348 primarily affects Cisco Ios Xe. In total, 82 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2016-1348?: 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-2016-1348 published?: CVE-2016-1348 was published on 2016-03-26 and last updated on 2026-06-17.

References

Affected products (82)

cpe:2.3:o:cisco:ios_xe:3.3xo_3.3.0xo:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.3xo_3.3.1xo:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.3xo_3.3.2xo:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.5e_3.5.0e:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.5e_3.5.1e:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.5e_3.5.2e:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.5e_3.5.3e:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.5s_3.5.0s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.5s_3.5.1s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.5s_3.5.2s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.6e_3.6.0e:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.6e_3.6.1e:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.6e_3.6.2ae:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.6e_3.6.2e:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.6e_3.6.3e:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.6s_3.6.0s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.6s_3.6.1s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.6s_3.6.2s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.7e_3.7.0e:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.7e_3.7.1e:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.7e_3.7.2e:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.7s_3.7.0s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.7s_3.7.1s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.7s_3.7.2s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.7s_3.7.2ts:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.7s_3.7.3s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.7s_3.7.4as:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.7s_3.7.4s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.7s_3.7.5s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.7s_3.7.6s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.7s_3.7.7s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.8e_3.8.0e:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.8s_3.8.0s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.8s_3.8.1s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.8s_3.8.2s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.9s_3.9.0as:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.9s_3.9.0s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.9s_3.9.1as:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.9s_3.9.1s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.9s_3.9.2s:*:*:*:*:*:*:*

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