How severe is CVE-2016-9203?

CVE-2016-9203 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-2016-9203 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (88th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-9203?

CVE-2016-9203 affects Cisco Asr 5000 Series Software. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2016-9203?

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-2016-9203 published?

CVE-2016-9203 was published on 2016-12-14 and last updated on 2026-06-17.

CVE-2016-9203

CVE-2016-9203 is a high-severity vulnerability in Cisco Asr 5000 Series Software 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-119.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 3% (88th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Cisco Asr 5000 Series Software
Published: 2016-12-14
Last modified: 2026-06-17

Description

A vulnerability in the Internet Key Exchange Version 2 (IKEv2) feature of Cisco ASR 5000 Series Software could allow an unauthenticated, remote attacker to cause a reload of the ipsecmgr process. More Information: CSCvb38398. Known Affected Releases: 20.2.3 20.2.3.65026. Known Fixed Releases: 21.1.M0.65431 21.1.PP0.65733 21.1.R0.65467 21.1.R0.65496 21.1.VC0.65434 21.1.VC0.65489 21.2.A0.65437.

Frequently asked questions

What is CVE-2016-9203?: A vulnerability in the Internet Key Exchange Version 2 (IKEv2) feature of Cisco ASR 5000 Series Software could allow an unauthenticated, remote attacker to cause a reload of the ipsecmgr process. More Information: CSCvb38398. Known Affected Releases: 20.2.3 20.2.3.65026. Known Fixed Releases: 21.1.M0.65431 21.1.PP0.65733 21.1.R0.65467 21.1.R0.65496 21.1.VC0.65434 21.1.VC0.65489 21.2.A0.65437.
How severe is CVE-2016-9203?: CVE-2016-9203 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-2016-9203 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (88th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-9203?: CVE-2016-9203 affects Cisco Asr 5000 Series Software. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2016-9203?: 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-2016-9203 published?: CVE-2016-9203 was published on 2016-12-14 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:cisco:asr_5000_series_software:20.0.2.3.65026:*:*:*:*:*:*:*

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