A vulnerability in Cisco NX-OS System Software could allow an authenticated, local attacker to bypass signature verification when loading a software patch. The vulnerability is due to insufficient NX-OS signature verification for software patches. An authenticated, local attacker could exploit this vulnerability to bypass signature verification and load a crafted, unsigned software patch on a targeted device. The attacker would need valid administrator credentials to perform this exploit. This vulnerability affects the following products running Cisco NX-OS System Software: Multilayer Director Switches, Nexus 7000 Series Switches, Nexus 7700 Series Switches, Unified Computing System Manager. Cisco Bug IDs: CSCvf16494, CSCvf23655.
CVE-2017-12331
MEDIUMNVD 6.76.7—
EchelonGraph scoreMEDIUM confidence
Score 6.7 from GitHub Security Advisory (severity: HIGH) published 2022-05-17. NVD baseline CVSS 6.7; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
6.7
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.7Exploit: NoneExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 6.7
- EG Score
- 6.7(medium)
- EPSS
- 14.1%
- KEV
- Not listed
Published
November 30, 2017
Last Modified
May 13, 2026
References (6)
- psirt@ciscohttp://www.securityfocus.com/bid/102159
- psirt@ciscohttp://www.securitytracker.com/id/1039930
- psirt@ciscohttps://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171129-nxos
- af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/102159
- af854a3a-2127-422b-91ae-364da2661108http://www.securitytracker.com/id/1039930
- af854a3a-2127-422b-91ae-364da2661108https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171129-nxos
Frequently asked(5)
What is CVE-2017-12331?
CVE-2017-12331 is a medium vulnerability published on November 30, 2017. A vulnerability in Cisco NX-OS System Software could allow an authenticated, local attacker to bypass signature verification when loading a software patch. The vulnerability is due to insufficient NX-OS signature verification for software patches. An authenticated, local attacker could exploit this…
When was CVE-2017-12331 disclosed?
CVE-2017-12331 was first published in the National Vulnerability Database on November 30, 2017, with the most recent update on May 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2017-12331 actively exploited?
CVE-2017-12331 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 14.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2017-12331?
CVE-2017-12331 has a CVSS v3 base score of 6.7 (NVD).
How do I remediate CVE-2017-12331?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2017-12331, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
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