How severe is CVE-2016-1335?

CVE-2016-1335 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2016-1335 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-1335?

CVE-2016-1335 primarily affects Cisco Asr 5000 Series Software. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2016-1335?

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-2016-1335 published?

CVE-2016-1335 was published on 2016-02-19 and last updated on 2026-06-17.

CVE-2016-1335

CVE-2016-1335 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-264.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 7.1
EPSS exploit prediction: 3% (87th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-264
Affected product: Cisco Asr 5000 Series Software
Published: 2016-02-19
Last modified: 2026-06-17

Description

The SSH implementation in Cisco StarOS before 19.3.M0.62771 and 20.x before 20.0.M0.62768 on ASR 5000 devices mishandles a multi-user public-key authentication configuration, which allows remote authenticated users to gain privileges by establishing a connection from an endpoint that was previously used for an administrator's connection, aka Bug ID CSCux22492.

Frequently asked questions

What is CVE-2016-1335?: The SSH implementation in Cisco StarOS before 19.3.M0.62771 and 20.x before 20.0.M0.62768 on ASR 5000 devices mishandles a multi-user public-key authentication configuration, which allows remote authenticated users to gain privileges by establishing a connection from an endpoint that was previously used for an administrator's connection, aka Bug ID CSCux22492.
How severe is CVE-2016-1335?: CVE-2016-1335 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2016-1335 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-1335?: CVE-2016-1335 primarily affects Cisco Asr 5000 Series Software. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2016-1335?: 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-2016-1335 published?: CVE-2016-1335 was published on 2016-02-19 and last updated on 2026-06-17.

References

Affected products (6)

cpe:2.3:a:cisco:asr_5000_series_software:16.5.2:*:*:*:*:*:*:*
cpe:2.3:a:cisco:asr_5000_series_software:17.7.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:asr_5000_series_software:18.4.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:asr_5000_series_software:19.0.1:*:*:*:*:*:*:*
cpe:2.3:a:cisco:asr_5000_series_software:19.3.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:asr_5000_series_software:20.0.0:*:*:*:*:*:*:*

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