CVE-2026-20280

HIGH

As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco IOS XR Software engineering team has conducted a comprehensive internal security review. This review ...

Affects 0 products across 1 vendor.

CVSS 3.18.8
EPSS0.3%
Percentile20th
PatchUnknown
CVSS Vector — Plain English Remotely exploitable over the network, low complexity, low privileges required, no user interaction needed, impact contained to the vulnerable component, full confidentiality impact, full integrity impact, full availability impact.
CWE Weakness Definitions
CWE-703: CWE-703
◆ AI Analysis — automated analysis, not human-reviewed

A high severity vulnerability (CVE-2026-20280) affects the target system. As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco IOS XR Software engineering team has conducted a comprehensive internal security review. This review resulted in a software hardening releases that addres...

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Frequently Asked Questions
What is CVE-2026-20280?
A high severity vulnerability (CVE-2026-20280) affects the target system. As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco IOS XR Software engineering team has conducted a comprehensive internal security review. This review resulted in a software hardening releases that addres...
What is the CVSS score for CVE-2026-20280?
CVE-2026-20280 has CVSS 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS: 0.3%.
Is CVE-2026-20280 actively exploited?
No confirmed active exploitation of CVE-2026-20280 as of 2026-09-25.
How do I remediate CVE-2026-20280?
Apply vendor patches for CVE-2026-20280. Monitor Cisco advisories.
What systems are affected by CVE-2026-20280?
CVE-2026-20280 affects: Cisco.
Vulnerability Details
CVE IDCVE-2026-20280
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published2026-09-02
Last Modified2026-09-18
ICS Relevance55%
Weakness (CWE)
CWE-703
SourceNVD
Official Description

As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco IOS XR Software engineering team has conducted a comprehensive internal security review. This review resulted in a software hardening releases that address multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-20280 are related to improper checking or handling of exceptional condition issues that are grouped under the Common Weakness Enumeration (CWE) CWE-703.

Source: NIST NVD / MITRE CVE Database

Affected Products
VendorProductFixed Version
Cisco — —
Remediation

No patch URL on record. Monitor vendor security advisories directly.

Threat Intelligence
● Threat Intelligence Validated: September 2026 | Threat Age: 25 Days
CISA KEVNot in KEV catalog
Public ExploitNot confirmed
PoC CodeNot confirmed
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