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CVE-2026-20280

HIGHCVSS 8.8/10EPSS 0.29%

Last modified

CVE-2026-20280 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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.. EPSS estimates a 0.29% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
8.8/10

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

EPSS Probability
0.29%

21.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
CiscoIos Xr6.5.25
CiscoIos Xr6.5.26
CiscoIos Xr6.5.28
CiscoIos Xr6.5.29
CiscoIos Xr6.5.31
CiscoIos Xr6.5.32
CiscoIos Xr6.5.33
CiscoIos Xr6.5.35
CiscoIos Xr6.5.90
CiscoIos Xr6.5.351
CiscoIos Xr6.5.352
CiscoIos Xr6.5.353
CiscoIos Xr6.7.1
CiscoIos Xr6.7.2
CiscoIos Xr6.7.3
CiscoIos Xr6.7.4
CiscoIos Xr6.7.35
CiscoIos Xr6.8.1
CiscoIos Xr6.8.2
CiscoIos Xr6.9.1
CiscoIos Xr6.9.2
CiscoIos Xr7.0.0
CiscoIos Xr7.0.1
CiscoIos Xr7.0.2
CiscoIos Xr7.0.11
CiscoIos Xr7.0.12
CiscoIos Xr7.0.14
CiscoIos Xr7.0.90
CiscoIos Xr7.1.1
CiscoIos Xr7.1.2
CiscoIos Xr7.1.3
CiscoIos Xr7.1.15
CiscoIos Xr7.1.25
CiscoIos Xr7.2.0
CiscoIos Xr7.2.1
CiscoIos Xr7.2.2
CiscoIos Xr7.2.12
CiscoIos Xr7.3.1
CiscoIos Xr7.3.2
CiscoIos Xr7.3.3
CiscoIos Xr7.3.4
CiscoIos Xr7.3.5
CiscoIos Xr7.3.6
CiscoIos Xr7.3.15
CiscoIos Xr7.3.16
CiscoIos Xr7.3.27
CiscoIos Xr7.4.1
CiscoIos Xr7.4.2
CiscoIos Xr7.4.15
CiscoIos Xr7.4.16

Showing 50 of 111 affected configurations. See NVD for the full list.

References

Timeline

Published
Last Modified
Status
Analyzed

Frequently Asked Questions

What is CVE-2026-20280?
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.
How severe is CVE-2026-20280?
CVE-2026-20280 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.29% probability of exploitation in the next 30 days.
How do I fix CVE-2026-20280?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST