High
Cisco IOS XE Software Security Hardening Release
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-2026-20268 are related to issues with improper restriction of operations within the bounds of a memory buffer that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-119.
Announced Group revision 1
Original source ↗CVE-2026-20268
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-20268
Cisco IOS XE Software
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "Cisco",
"product": "Cisco IOS XE Software",
"versions": [
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{
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{
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{
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{
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{
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"status": "affected",
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{
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{
"status": "affected",
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},
{
"status": "affected",
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{
"status": "affected",
"version": "16.12.16"
},
{
"status": "affected",
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{
"status": "affected",
"version": "26.1.3"
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{
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"version": "17.12.9"
},
{
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}
],
"defaultStatus": "unknown"
}
]- Related CVEs
- CVE-2026-20268
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #8194 · Revision 1
- Added to Heist Feed
- Publisher date