How severe is CVE-2015-6273?

CVE-2015-6273 has a CVSS 2.0 base score of 7.8, rated high severity.

Is CVE-2015-6273 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-6273?

CVE-2015-6273 primarily affects Cisco Ios Xe. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2015-6273?

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-2015-6273 published?

CVE-2015-6273 was published on 2015-08-29 and last updated on 2026-06-17.

CVE-2015-6273

CVE-2015-6273 is a high-severity vulnerability in Cisco Ios Xe 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: 2% (77th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-399
Affected product: Cisco Ios Xe
Published: 2015-08-29
Last modified: 2026-06-17

Description

Cisco IOS XE before 3.1.2S on ASR 1000 devices mishandles the automatic setup of Virtual Fragment Reassembly (VFR) by certain firewall and NAT components, which allows remote attackers to cause a denial of service (Embedded Services Processor crash) via crafted IP packets, aka Bug IDs CSCtf87624, CSCte93229, CSCtd19103, and CSCti63623.

Frequently asked questions

What is CVE-2015-6273?: Cisco IOS XE before 3.1.2S on ASR 1000 devices mishandles the automatic setup of Virtual Fragment Reassembly (VFR) by certain firewall and NAT components, which allows remote attackers to cause a denial of service (Embedded Services Processor crash) via crafted IP packets, aka Bug IDs CSCtf87624, CSCte93229, CSCtd19103, and CSCti63623.
How severe is CVE-2015-6273?: CVE-2015-6273 has a CVSS 2.0 base score of 7.8, rated high severity.
Is CVE-2015-6273 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-6273?: CVE-2015-6273 primarily affects Cisco Ios Xe. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2015-6273?: 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-2015-6273 published?: CVE-2015-6273 was published on 2015-08-29 and last updated on 2026-06-17.

References

Affected products (5)

cpe:2.3:o:cisco:ios_xe:2.2.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:2.2.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:2.2.3:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.1.0s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.1.1s:*:*:*:*:*:*:*

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