CVE-2026-20288: Improper Neutralization of Expression/Command Delimiters in Cisco Cisco Unified Computing System (Standalone)
A vulnerability in the web-based management interface of Cisco IMC could allow an authenticated, remote attacker with Admin privileges to execute arbitrary commands on the underlying operating system of an affected system and elevate privileges to root. This vulnerability is due to improper validation of user-supplied input. An attacker could exploit this vulnerability by entering crafted inputs to the web-based management interface of the affected software. A successful exploit could allow the attacker to execute arbitrary commands on the underlying operating system as the root user. Cisco has assigned this vulnerability a SIR of High rather than Medium as the score indicates because additional security implications could occur when the attacker becomes root.
AI Analysis
Technical Summary
This vulnerability involves improper neutralization of expression or command delimiters in the Cisco IMC web-based management interface. An attacker with Admin privileges can exploit this flaw by submitting crafted inputs, leading to arbitrary command execution on the underlying OS with root privileges. The vulnerability stems from insufficient input validation, allowing command injection. Cisco has assigned a high security impact rating due to the potential for privilege escalation to root, despite the CVSS score being medium.
Potential Impact
Successful exploitation allows an authenticated attacker with Admin privileges to execute arbitrary commands on the underlying operating system as the root user, potentially leading to full system compromise. This elevates the attacker's privileges beyond the initial Admin level to root, increasing the severity of the impact.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround has been provided at this time. Until a patch is available, restrict Admin access to trusted personnel and monitor for unusual activity on the management interface.
CVE-2026-20288: Improper Neutralization of Expression/Command Delimiters in Cisco Cisco Unified Computing System (Standalone)
Description
A vulnerability in the web-based management interface of Cisco IMC could allow an authenticated, remote attacker with Admin privileges to execute arbitrary commands on the underlying operating system of an affected system and elevate privileges to root. This vulnerability is due to improper validation of user-supplied input. An attacker could exploit this vulnerability by entering crafted inputs to the web-based management interface of the affected software. A successful exploit could allow the attacker to execute arbitrary commands on the underlying operating system as the root user. Cisco has assigned this vulnerability a SIR of High rather than Medium as the score indicates because additional security implications could occur when the attacker becomes root.
CVSS v3.1
Score 6.5medium
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves improper neutralization of expression or command delimiters in the Cisco IMC web-based management interface. An attacker with Admin privileges can exploit this flaw by submitting crafted inputs, leading to arbitrary command execution on the underlying OS with root privileges. The vulnerability stems from insufficient input validation, allowing command injection. Cisco has assigned a high security impact rating due to the potential for privilege escalation to root, despite the CVSS score being medium.
Potential Impact
Successful exploitation allows an authenticated attacker with Admin privileges to execute arbitrary commands on the underlying operating system as the root user, potentially leading to full system compromise. This elevates the attacker's privileges beyond the initial Admin level to root, increasing the severity of the impact.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround has been provided at this time. Until a patch is available, restrict Admin access to trusted personnel and monitor for unusual activity on the management interface.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- cisco
- Date Reserved
- 2025-10-08T11:59:15.405Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a736b60bf8831d5392da49d
Added to database: 08/05/2026, 16:57:04 UTC
Last enriched: 08/05/2026, 17:33:30 UTC
Last updated: 08/05/2026, 22:00:26 UTC
Views: 4
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.