CVE-2021-34709
MEDIUMCisco IOS XR < 7.3.2 - Authenticated Arbitrary Code Execution via Image Verification Bypass
Title source: llmDescription
Multiple vulnerabilities in image verification checks of Cisco Network Convergence System (NCS) 540 Series Routers, only when running Cisco IOS XR NCS540L software images, and Cisco IOS XR Software for Cisco 8000 Series Routers could allow an authenticated, local attacker to execute arbitrary code on the underlying operating system. For more information about these vulnerabilities, see the Details section of this advisory.
References (1)
Core 1
Core References
Vendor Advisory vendor-advisory
x_refsource_cisco
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-lnt-QN9mCzwn
Scores
CVSS v3
6.0
EPSS
0.0002
EPSS Percentile
6.9%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
total
Details
CWE
CWE-347
Status
published
Products (1)
cisco/ios_xr
< 7.3.2
Published
Sep 09, 2021
Tracked Since
Feb 18, 2026