Cisco IOS XE Catalyst SD-WAN 16.11.1a when installed on Cisco 4000 Series Integrated Services Routers

productUS

A product tracked in the threat graph; the vulnerabilities below are known to affect it.

KEV-listed

public exploit

EPSS ≥ 10%

critical

by severity

0critical2high0medium0low

updated 2026-10-27

vulnerabilities (3)

Related CVEs.

sort

ID	severity	EPSS	exploitable	patched	published	affected
CVE-2021-1274US	high8.6	1.92% (80th)	—	no fix	2021-01-20	—
CVE-2021-1278US	high7.5	1.68% (77th)	—	no fix	2021-01-20	—
CVE-2022-20655US	—	0.83% (57th)	—	no fix	2024-11-15	—

The flaw types (CWEs) most of these CVEs share.

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer2 CVEs
CWE-476NULL Pointer Dereference1 CVEs
CWE-59Improper Link Resolution Before File Access ('Link Following')1 CVEs
CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')1 CVEs

Which sources assert this record, and when.

scry

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