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Highest advisory severityMedium 1 vendor · 1 advisory

CVE-2026-20110

CVE-2026-20110: 1 tracked advisory record across Cisco. Compare vendor sources and published fix guidance.

Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.

NVD detail CVE.org

Vendor advisory comparison

Cisco

1 advisory
  • Advisory severityMedium6.5

    Medium [CVE-2026-20110] Cisco IOS XE Software Denial of Service Vulnerability

    cisco-sa-iosxe-mntc-dos-LZweQcyqSource published Source updated

    A vulnerability in the CLI of Cisco IOS XE Software could allow an authenticated, local attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability exists because incorrect privileges are associated with the start maintenance command. An attacker could exploit this vulnerability by accessing the management CLI of the affected device as a low-privileged user and using the start maintenance command. A successful exploit could allow the attacker to put the device in maintenance mode, which shuts down interfaces, resulting in a denial of service (DoS) condition. In case of exploitation, a device administrator can connect to the CLI and use the stop maintenance command to restore operations. Cisco has released software updates that address this…

    Related products — impact not confirmed
    • IOS XE Software
    Source-reported affected versions
    • Scope: At the time of publication, this vulnerability affected Cisco IOS XE Software if it supported the start maintenance command.
    Source-reported fixed versions
    No fixed-version detail extracted. This does not mean no fix exists.
    Mitigation guidance
    No mitigation guidance extracted; consult the source.
    Workarounds
    • There is a workaround that addresses this vulnerability. Set the privilege level of the start maintenance command manually by connecting to the device management CLI and using the privilege exec level 15 start maintenance configuration command, as shown in the following example:
    • Router# configuration terminal
    • Enter configuration commands, one per line. End with CNTL/Z.
    • Router(config)# privilege exec level 15 start maintenance

    1 more entries in the full advisory.

    Full advisory and evidenceOpen source bulletin

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