Skip to main content
Threat Radar animated logo
DashboardThreatsMapFeedsPricingView Plans & Pricing
reconnecting
Press slash or control plus K to focus the search. Use the arrow keys to navigate results and press enter to open a threat.
Reconnecting to live updates…

CVE-2026-20272: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') in Cisco Cisco IOS XE Software

0
Critical
VulnerabilityCVE-2026-20272cvecve-2026-20272
Published: 08/05/2026 (08/05/2026, 16:19:26 UTC)
Source: CVE Database V5
Vendor/Project: Cisco
Product: Cisco IOS XE Software

Description

As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco IOS XE Software engineering team has conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-20272 are related to issues with improper neutralization of special elements that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-74.

CVSS v3.1

Score 9.8critical

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected software

Affected versions
=17.2.1a=16.12.1y=16.12.3s=16.7.1b=16.6.2=16.6.5=16.12.1w=16.9.1d=17.3.1=16.9.4c=16.7.1=17.2.1=16.6.8=16.9.1b=16.9.2s=16.12.4=16.12.3a=17.1.1s=16.11.1a=16.7.2=16.11.1b=16.9.1s=16.9.3h=16.9.1c=16.6.5a=16.6.3=16.10.1f=17.2.1v=16.8.1e=16.9.3a=16.12.1a=16.12.1x=16.6.4s=16.10.1c=16.12.3=16.11.2=16.6.5b=16.12.2s=16.10.1b=16.7.3=16.6.7=16.9.6=16.9.2=16.10.1=16.12.1t=16.9.1=16.8.1a=16.9.3s=16.6.7a=16.12.2=16.11.1=16.9.3=16.11.1s=16.12.1=17.1.1=17.1.2=16.10.1d=17.1.1t=16.9.4=16.8.3=16.12.2t=16.9.5=16.8.1s=16.10.1e=16.8.2=16.6.4=16.8.1b=16.10.1a=16.12.1z=16.8.1c=16.9.1a=16.9.5f=16.6.4a=16.10.1g=16.8.1=16.6.6=16.9.2a=16.8.1d=16.10.3=16.7.1a=16.11.1c=16.10.1s=17.2.1r=17.1.1a=16.10.2=16.12.2a=16.12.1c=16.12.1s=16.7.4=17.2.2=16.9.8=16.9.7=17.1.3=17.3.1a=17.3.2a=16.12.5=17.3.1w=17.3.2=17.4.1=16.12.4a=17.4.1a=17.3.1x=17.3.3=16.6.9=17.2.3=17.5.1=16.12.1z1=16.12.5a=17.4.1b=17.3.1z=16.12.5b=17.4.2=17.3.3a=17.3.5=17.3.4=17.5.1a=16.12.6=17.6.1=16.12.1z2=16.6.10=17.3.4a=17.6.1a=17.7.1=17.6.1x=17.6.2=16.12.6a=17.3.4c=17.4.2a=17.3.4b=17.7.1a=16.12.7=17.8.1a=17.6.3a=17.6.3=17.7.2=17.7.1b=17.9.1w=17.3.5a=17.6.1z=16.12.8=17.8.1=17.9.1=17.6.4=17.3.5b=17.9.1a=17.3.6=17.10.1=16.9.8a=17.6.1z1=17.10.1a=17.9.2=17.6.5=17.9.1x=17.9.1y=16.9.8b=17.3.7=17.9.2a=17.9.3=16.12.9=17.11.1=17.10.1b=17.6.6=17.9.1x1=17.11.1a=17.9.3a=17.12.1=17.3.8=17.9.4=16.12.10=17.12.1w=17.9.1y1=17.12.1a=17.9.5=17.13.1=17.12.1x=17.12.2=17.14.1=17.9.4a=17.3.8a=17.6.6a=17.6.5a=17.6.7=16.12.10a=17.15.1=17.13.1a=17.12.2a=16.12.11=17.12.3=17.12.1y=17.12.1z=17.9.5a=17.14.1a=17.9.5b=17.6.8=16.12.12=17.12.4=17.9.6=17.17.1=17.16.1=17.15.1w=17.12.3a=17.9.5c=17.15.1a=17.12.1z1=17.15.2=17.15.1b=17.9.5d=17.15.1x=17.9.6a=17.12.1z2=17.6.8a=17.16.1a=16.12.13=17.15.3=17.9.7=17.12.5=17.15.1y=17.9.5e=17.12.4a=17.15.2a=17.15.2c=17.15.2b=17.12.1z3=17.9.5f=17.12.4b=17.12.5a=17.18.1=17.12.6=17.12.1z4=17.9.8=17.9.7a=17.15.3a=17.15.4=17.12.5b=17.15.3b=16.12.14=17.18.1z=17.9.7b=17.12.5c=26.1.1=17.18.1a=17.15.4a=17.18.2=17.18.1w=17.15.4b=17.12.6a=17.12.7=17.15.4c=17.9.9=17.12.5d=16.12.15=17.15.4s1=17.15.5=17.12.1z5=17.18.1x=17.12.1z6=17.15.4d=17.12.6b=17.4.1c=17.15.5a=17.18.1y=17.12.7a=17.18.3=17.12.7b=17.18.3a=26.1.1a=17.15.7=16.12.1617.2.1a16.12.1y16.12.3s16.7.1b16.6.216.6.516.12.1w16.9.1d17.3.116.9.4c16.7.117.2.116.6.816.9.1b16.9.2s16.12.416.12.3a17.1.1s16.11.1a16.7.216.11.1b16.9.1s16.9.3h16.9.1c16.6.5a16.6.316.10.1f17.2.1v16.8.1e16.9.3a16.12.1a16.12.1x16.6.4s16.10.1c16.12.316.11.216.6.5b16.12.2s16.10.1b16.7.316.6.716.9.616.9.216.10.116.12.1t16.9.116.8.1a16.9.3s16.6.7a16.12.216.11.116.9.316.11.1s16.12.117.1.117.1.216.10.1d17.1.1t16.9.416.8.316.12.2t16.9.516.8.1s16.10.1e16.8.216.6.416.8.1b16.10.1a16.12.1z16.8.1c16.9.1a16.9.5f16.6.4a16.10.1g16.8.116.6.616.9.2a16.8.1d16.10.316.7.1a16.11.1c16.10.1s17.2.1r17.1.1a16.10.216.12.2a16.12.1c16.12.1s16.7.417.2.216.9.816.9.717.1.317.3.1a17.3.2a16.12.517.3.1w17.3.217.4.116.12.4a17.4.1a17.3.1x17.3.316.6.917.2.317.5.116.12.1z116.12.5a17.4.1b17.3.1z16.12.5b17.4.217.3.3a17.3.517.3.417.5.1a16.12.617.6.116.12.1z216.6.1017.3.4a17.6.1a17.7.117.6.1x17.6.216.12.6a17.3.4c17.4.2a17.3.4b17.7.1a16.12.717.8.1a17.6.3a17.6.317.7.217.7.1b17.9.1w17.3.5a17.6.1z16.12.817.8.117.9.117.6.417.3.5b17.9.1a17.3.617.10.116.9.8a17.6.1z117.10.1a17.9.217.6.517.9.1x17.9.1y16.9.8b17.3.717.9.2a17.9.316.12.917.11.117.10.1b17.6.617.9.1x117.11.1a17.9.3a17.12.117.3.817.9.416.12.1017.12.1w17.9.1y117.12.1a17.9.517.13.117.12.1x17.12.217.14.117.9.4a17.3.8a17.6.6a17.6.5a17.6.716.12.10a17.15.117.13.1a17.12.2a16.12.1117.12.317.12.1y17.12.1z17.9.5a17.14.1a17.9.5b17.6.816.12.1217.12.417.9.617.17.117.16.117.15.1w17.12.3a17.9.5c17.15.1a17.12.1z117.15.217.15.1b17.9.5d17.15.1x17.9.6a17.12.1z217.6.8a17.16.1a16.12.1317.15.317.9.717.12.517.15.1y17.9.5e17.12.4a17.15.2a17.15.2c17.15.2b17.12.1z317.9.5f17.12.4b17.12.5a17.18.117.12.617.12.1z417.9.817.9.7a17.15.3a17.15.417.12.5b17.15.3b16.12.1417.18.1z17.9.7b17.12.5c26.1.117.18.1a17.15.4a17.18.217.18.1w17.15.4b17.12.6a17.12.717.15.4c17.9.917.12.5d16.12.1517.15.4s117.15.517.12.1z517.18.1x17.12.1z617.15.4d17.12.6b17.4.1c17.15.5a17.18.1y17.12.7a17.18.317.12.7b17.18.3a26.1.1a17.15.716.12.16

Technical Details

Data Version
5.2
Assigner Short Name
cisco
Date Reserved
2025-10-08T11:59:15.403Z
Cvss Version
3.1
State
PUBLISHED
Remediation Level
null

Threat ID: 6a736b60bf8831d5392da497

Added to database: 08/05/2026, 16:57:04 UTC

Last updated: 08/05/2026, 17:57:58 UTC

Views: 3

Community Reviews

0 reviews

Crowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.

Sort by
Loading community insights…

Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.

Actions

Please log in to the Console to use AI analysis features.

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

Breach by OffSeqOFFSEQFRIENDS — 25% OFF

Check if your credentials are on the dark web

Instant breach scanning across billions of leaked records. Free tier available.

Scan now
OffSeq TrainingCredly Certified

Lead Pen Test Professional

Technical5-day eLearningPECB Accredited
View courses