Cisco NX-OS Software Image Signature Verification Vulnerability
Published Mar 11, 2019
6.7
MEDIUMCVSS 3.0
EPSS 0.25%
Description
A vulnerability in the Image Signature Verification feature of Cisco NX-OS Software could allow an authenticated, local attacker with administrator-level credentials to install a malicious software image on an affected device. The vulnerability is due to improper verification of digital signatures for software images. An attacker could exploit this vulnerability by loading an unsigned software image on an affected device. A successful exploit could allow the attacker to boot a malicious software image. Note: The fix for this vulnerability requires a BIOS upgrade as part of the software upgrade. For additional information, see the Details section of this advisory. Nexus 3000 Series Switches are affected running software versions prior to 7.0(3)I7(5). Nexus 9000 Series Fabric Switches in ACI Mode are affected running software versions prior to 13.2(1l). Nexus 9000 Series Switches in Standalone NX-OS Mode are affected running software versions prior to 7.0(3)I7(5). Nexus 9500 R-Series Line Cards and Fabric Modules are affected running software versions prior to 7.0(3)F3(5).
Affected products
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- Version unspecifiedStatusaffectedConstraints<7.0(3)I7(5)
- Version
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- Version unspecifiedStatusaffectedConstraints<13.2(1l)
- Version
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- Version unspecifiedStatusaffectedConstraints<7.0(3)I7(5)
- Version
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- Version unspecifiedStatusaffectedConstraints<7.0(3)F3(5)
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Cisco | Nexus 3000 Series Switches | n/a |
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| Cisco | Nexus 9000 Series Fabric Switches in ACI Mode | n/a |
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| Cisco | Nexus 9000 Series Switches in Standalone NX-OS Mode | n/a |
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| Cisco | Nexus 9500 R-Series Line Cards and Fabric Modules | n/a |
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Configuration 1
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Configuration 2
Running on/with
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No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
AV:L/AC:L/Au:N/C:P/I:P/A:P
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
NoTechnical Impact
TotalDecision
n/aAssessed Nov 20, 2024 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (8 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 0.25% (0.00246) | 14.37th | v5 (v2026.06.15) |
| Sep 20, 2026 | 0.25% (0.00246) | 16.13th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.04% (0.00042) | 5.06th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00042) | 5.63th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Jan 6, 2022 | 1.47% (0.01474) | 32.51th | v1 |
| Jan 5, 2022 | 0.33% (0.00332) | 7.00th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.33% (0.00332) | 0.00th | v1 |
References (2)
- http://www.securityfocus.com/bid/107397 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190306-nxos-sig-verif vendor-advisoryx_refsource_CISCOVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/107397 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190306-nxos-sig-verif | vendor-advisoryx_refsource_CISCOVendor Advisory |
Change history (0)
No recorded changes yet.