CVE-2026-20277
published 2026-09-02CVE-2026-20277: As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco IOS XR Software engineering team has conducted a comprehensive…
PriorityP343high8.2CVSS 3.1
AVNACLPRNUINSUCNILAH
EPSS
0.22%
12.4th percentile
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-2026-20277 are related to protection mechanism failure issues that are grouped under the Common Weakness Enumeration (CWE) CWE-693.
Affected
111 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
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GHSA
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.
ghsa_unreviewed·2026-09-02·CVSS 8.2
CVE-2026-20277 [HIGH] CWE-693 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.
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-2026-20277 are related to protection mechanism failure issues that are grouped under the Common Weakness Enumeration (CWE) CWE-693.
VulDB
Cisco IOS XR Software up to 26.2.101 protection mechanism (EUVD-2026-70202)
vuldb·2026-09-02·CVSS 8.2
CVE-2026-20277 [HIGH] Cisco IOS XR Software up to 26.2.101 protection mechanism (EUVD-2026-70202)
A vulnerability was found in Cisco IOS XR Software. It has been declared as critical. This vulnerability affects unknown code. Executing a manipulation can lead to protection mechanism failure.
This vulnerability is handled as CVE-2026-20277. The attack can be executed remotely. There is not any exploit available.
It is recommended to upgrade the affected component.
No detection rules found.
No public exploits indexed.
2026-09-02
Published