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Vulnerability record · CVE-2026-20278 · published 2 September 2026

CVE-2026-20278: As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco IOS XR Software eng…

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-2026-20278 are related to improper neutralization issues that are grouped under the Common Weakness Enumeration (CWE) CWE-707.

8.8 CVSS 3.1 High EPSS 0.30% · top 79.8% CWE-707 · CWE-707 Awaiting Analysis
8.8CVSS 3.1 base score
0.30%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
2References
18 Sep 2026Last modified by NVD

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-2026-20278 are related to improper neutralization issues that are grouped under the Common Weakness Enumeration (CWE) CWE-707.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

LinkTags
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-iosxr-qg64NcM
https://www.cve.org/Media/News/item/blog/2026/06/16/Preserving-Vulnerability-Level-Identification

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

7.0CVE-2025-26633Microsoft Management Console improper neutralization security feature bypassMicrosoft Management Console (MMC) fails to properly neutralize input, letting an attacker bypass a security feature. The flaw affects a broad set of…KEVEPSS 30%analysed7.8CVE-2024-43572Microsoft Management Console remote code execution flawCVE-2024-43572 is a remote code execution vulnerability in the Microsoft Management Console (MMC) affecting a broad range of Windows 10, Windows 11 a…KEVEPSS 67%analysed

Source: NIST National Vulnerability Database (record CVE-2026-20278), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.