How severe is CVE-2015-4243?

CVE-2015-4243 has a CVSS 2.0 base score of 6.1, rated medium severity.

Is CVE-2015-4243 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-4243?

CVE-2015-4243 affects Cisco Ios Xe. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2015-4243?

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

When was CVE-2015-4243 published?

CVE-2015-4243 was published on 2015-07-08 and last updated on 2026-06-17.

CVE-2015-4243

CVE-2015-4243 is a medium-severity vulnerability in Cisco Ios Xe with a CVSS 2.0 base score of 6.1. 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 2.0 base score 6.1)
EPSS exploit prediction: 1% (51st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-399
Affected product: Cisco Ios Xe
Published: 2015-07-08
Last modified: 2026-06-17

Description

The PPPoE establishment implementation in Cisco IOS XE 3.5.0S on ASR 1000 devices allows remote attackers to cause a denial of service (device reload) by sending malformed PPPoE Active Discovery Request (PADR) packets on the local network, aka Bug ID CSCty94202.

Frequently asked questions

What is CVE-2015-4243?: The PPPoE establishment implementation in Cisco IOS XE 3.5.0S on ASR 1000 devices allows remote attackers to cause a denial of service (device reload) by sending malformed PPPoE Active Discovery Request (PADR) packets on the local network, aka Bug ID CSCty94202.
How severe is CVE-2015-4243?: CVE-2015-4243 has a CVSS 2.0 base score of 6.1, rated medium severity.
Is CVE-2015-4243 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-4243?: CVE-2015-4243 affects Cisco Ios Xe. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2015-4243?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2015-4243 published?: CVE-2015-4243 was published on 2015-07-08 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:cisco:ios_xe:3.5.0s:*:*:*:*:*:*:*

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