8.6
HIGH
CVSS 3.1
CVE-2026-20269
Cisco IOS XE Software Security Hardening Release
Overview
Description
As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco IOS XE Software engineering team has conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-20269 are related to issues with improper control of a resource through its lifetime that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-664.
Details
INFO
Published Date :
Aug. 5, 2026, 5:16 p.m.
Last Modified :
Aug. 5, 2026, 6:17 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Impact
Affected Products
The following products are affected by CVE-2026-20269
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework
for assessing the severity of vulnerabilities in software and systems.
We collect and displays CVSS scores from various sources for each CVE.
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | [email protected] |
Solution
Apply software hardening releases to address resource lifetime control vulnerabilities.
- Update Cisco IOS XE Software to the latest version.
- Apply security hardening releases provided by Cisco.
- Review resource management configurations.
References
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-20269.
| URL | Resource |
|---|---|
| https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-iosxe-V8NMuMZJ |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-20269 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-20269
weaknesses.
CAPEC-21: Exploitation of Trusted Identifiers Exploitation of Trusted Identifiers
CAPEC-60: Reusing Session IDs (aka Session Replay) Reusing Session IDs (aka Session Replay)
CAPEC-61: Session Fixation Session Fixation
CAPEC-62: Cross Site Request Forgery Cross Site Request Forgery
CAPEC-196: Session Credential Falsification through Forging Session Credential Falsification through Forging
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-20269 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-20269 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Aug. 05, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-20269', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-08-05T17:33:29.799902Z'} -
New CVE Received by [email protected]
Aug. 05, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'Cisco', 'product': 'Cisco IOS XE Software', 'versions': [{'status': 'affected', 'version': '17.2.1a'}, {'status': 'affected', 'version': '16.12.1y'}, {'status': 'affected', 'version': '16.12.3s'}, {'status': 'affected', 'version': '16.7.1b'}, {'status': 'affected', 'version': '16.6.2'}, {'status': 'affected', 'version': '16.6.5'}, {'status': 'affected', 'version': '16.12.1w'}, {'status': 'affected', 'version': '16.9.1d'}, {'status': 'affected', 'version': '17.3.1'}, {'status': 'affected', 'version': '16.9.4c'}, {'status': 'affected', 'version': '16.7.1'}, {'status': 'affected', 'version': '17.2.1'}, {'status': 'affected', 'version': '16.6.8'}, {'status': 'affected', 'version': '16.9.1b'}, {'status': 'affected', 'version': '16.9.2s'}, {'status': 'affected', 'version': '16.12.4'}, {'status': 'affected', 'version': '16.12.3a'}, {'status': 'affected', 'version': '17.1.1s'}, {'status': 'affected', 'version': '16.11.1a'}, {'status': 'affected', 'version': '16.7.2'}, {'status': 'affected', 'version': '16.11.1b'}, {'status': 'affected', 'version': '16.9.1s'}, {'status': 'affected', 'version': '16.9.3h'}, {'status': 'affected', 'version': '16.9.1c'}, {'status': 'affected', 'version': '16.6.5a'}, {'status': 'affected', 'version': '16.6.3'}, {'status': 'affected', 'version': '16.10.1f'}, {'status': 'affected', 'version': '17.2.1v'}, {'status': 'affected', 'version': '16.8.1e'}, {'status': 'affected', 'version': '16.9.3a'}, {'status': 'affected', 'version': '16.12.1a'}, {'status': 'affected', 'version': '16.12.1x'}, {'status': 'affected', 'version': '16.6.4s'}, {'status': 'affected', 'version': '16.10.1c'}, {'status': 'affected', 'version': '16.12.3'}, {'status': 'affected', 'version': '16.11.2'}, {'status': 'affected', 'version': '16.6.5b'}, {'status': 'affected', 'version': '16.12.2s'}, {'status': 'affected', 'version': '16.10.1b'}, {'status': 'affected', 'version': '16.7.3'}, {'status': 'affected', 'version': '16.6.7'}, {'status': 'affected', 'version': '16.9.6'}, {'status': 'affected', 'version': '16.9.2'}, {'status': 'affected', 'version': '16.10.1'}, {'status': 'affected', 'version': '16.12.1t'}, {'status': 'affected', 'version': '16.9.1'}, {'status': 'affected', 'version': '16.8.1a'}, {'status': 'affected', 'version': '16.9.3s'}, {'status': 'affected', 'version': '16.6.7a'}, {'status': 'affected', 'version': '16.12.2'}, {'status': 'affected', 'version': '16.11.1'}, {'status': 'affected', 'version': '16.9.3'}, {'status': 'affected', 'version': '16.11.1s'}, {'status': 'affected', 'version': '16.12.1'}, {'status': 'affected', 'version': '17.1.1'}, {'status': 'affected', 'version': '17.1.2'}, {'status': 'affected', 'version': '16.10.1d'}, {'status': 'affected', 'version': '17.1.1t'}, {'status': 'affected', 'version': '16.9.4'}, {'status': 'affected', 'version': '16.8.3'}, {'status': 'affected', 'version': '16.12.2t'}, {'status': 'affected', 'version': '16.9.5'}, {'status': 'affected', 'version': '16.8.1s'}, {'status': 'affected', 'version': '16.10.1e'}, {'status': 'affected', 'version': '16.8.2'}, {'status': 'affected', 'version': '16.6.4'}, {'status': 'affected', 'version': '16.8.1b'}, {'status': 'affected', 'version': '16.10.1a'}, {'status': 'affected', 'version': '16.12.1z'}, {'status': 'affected', 'version': '16.8.1c'}, {'status': 'affected', 'version': '16.9.1a'}, {'status': 'affected', 'version': '16.9.5f'}, {'status': 'affected', 'version': '16.6.4a'}, {'status': 'affected', 'version': '16.10.1g'}, {'status': 'affected', 'version': '16.8.1'}, {'status': 'affected', 'version': '16.6.6'}, {'status': 'affected', 'version': '16.9.2a'}, {'status': 'affected', 'version': '16.8.1d'}, {'status': 'affected', 'version': '16.10.3'}, {'status': 'affected', 'version': '16.7.1a'}, {'status': 'affected', 'version': '16.11.1c'}, {'status': 'affected', 'version': '16.10.1s'}, {'status': 'affected', 'version': '17.2.1r'}, {'status': 'affected', 'version': '17.1.1a'}, {'status': 'affected', 'version': '16.10.2'}, {'status': 'affected', 'version': '16.12.2a'}, {'status': 'affected', 'version': '16.12.1c'}, {'status': 'affected', 'version': '16.12.1s'}, {'status': 'affected', 'version': '16.7.4'}, {'status': 'affected', 'version': '17.2.2'}, {'status': 'affected', 'version': '16.9.8'}, {'status': 'affected', 'version': '16.9.7'}, {'status': 'affected', 'version': '17.1.3'}, {'status': 'affected', 'version': '17.3.1a'}, {'status': 'affected', 'version': '17.3.2a'}, {'status': 'affected', 'version': '16.12.5'}, {'status': 'affected', 'version': '17.3.1w'}, {'status': 'affected', 'version': '17.3.2'}, {'status': 'affected', 'version': '17.4.1'}, {'status': 'affected', 'version': '16.12.4a'}, {'status': 'affected', 'version': '17.4.1a'}, {'status': 'affected', 'version': '17.3.1x'}, {'status': 'affected', 'version': '17.3.3'}, {'status': 'affected', 'version': '16.6.9'}, {'status': 'affected', 'version': '17.2.3'}, {'status': 'affected', 'version': '17.5.1'}, {'status': 'affected', 'version': '16.12.1z1'}, {'status': 'affected', 'version': '16.12.5a'}, {'status': 'affected', 'version': '17.4.1b'}, {'status': 'affected', 'version': '17.3.1z'}, {'status': 'affected', 'version': '16.12.5b'}, {'status': 'affected', 'version': '17.4.2'}, {'status': 'affected', 'version': '17.3.3a'}, {'status': 'affected', 'version': '17.3.5'}, {'status': 'affected', 'version': '17.3.4'}, {'status': 'affected', 'version': '17.5.1a'}, {'status': 'affected', 'version': '16.12.6'}, {'status': 'affected', 'version': '17.6.1'}, {'status': 'affected', 'version': '16.12.1z2'}, {'status': 'affected', 'version': '16.6.10'}, {'status': 'affected', 'version': '17.3.4a'}, {'status': 'affected', 'version': '17.6.1a'}, {'status': 'affected', 'version': '17.7.1'}, {'status': 'affected', 'version': '17.6.1x'}, {'status': 'affected', 'version': '17.6.2'}, {'status': 'affected', 'version': '16.12.6a'}, {'status': 'affected', 'version': '17.3.4c'}, {'status': 'affected', 'version': '17.4.2a'}, {'status': 'affected', 'version': '17.3.4b'}, {'status': 'affected', 'version': '17.7.1a'}, {'status': 'affected', 'version': '16.12.7'}, {'status': 'affected', 'version': '17.8.1a'}, {'status': 'affected', 'version': '17.6.3a'}, {'status': 'affected', 'version': '17.6.3'}, {'status': 'affected', 'version': '17.7.2'}, {'status': 'affected', 'version': '17.7.1b'}, {'status': 'affected', 'version': '17.9.1w'}, {'status': 'affected', 'version': '17.3.5a'}, {'status': 'affected', 'version': '17.6.1z'}, {'status': 'affected', 'version': '16.12.8'}, {'status': 'affected', 'version': '17.8.1'}, {'status': 'affected', 'version': '17.9.1'}, {'status': 'affected', 'version': '17.6.4'}, {'status': 'affected', 'version': '17.3.5b'}, {'status': 'affected', 'version': '17.9.1a'}, {'status': 'affected', 'version': '17.3.6'}, {'status': 'affected', 'version': '17.10.1'}, {'status': 'affected', 'version': '16.9.8a'}, {'status': 'affected', 'version': '17.6.1z1'}, {'status': 'affected', 'version': '17.10.1a'}, {'status': 'affected', 'version': '17.9.2'}, {'status': 'affected', 'version': '17.6.5'}, {'status': 'affected', 'version': '17.9.1x'}, {'status': 'affected', 'version': '17.9.1y'}, {'status': 'affected', 'version': '16.9.8b'}, {'status': 'affected', 'version': '17.3.7'}, {'status': 'affected', 'version': '17.9.2a'}, {'status': 'affected', 'version': '17.9.3'}, {'status': 'affected', 'version': '16.12.9'}, {'status': 'affected', 'version': '17.11.1'}, {'status': 'affected', 'version': '17.10.1b'}, {'status': 'affected', 'version': '17.6.6'}, {'status': 'affected', 'version': '17.9.1x1'}, {'status': 'affected', 'version': '17.11.1a'}, {'status': 'affected', 'version': '17.9.3a'}, {'status': 'affected', 'version': '17.12.1'}, {'status': 'affected', 'version': '17.3.8'}, {'status': 'affected', 'version': '17.9.4'}, {'status': 'affected', 'version': '16.12.10'}, {'status': 'affected', 'version': '17.12.1w'}, {'status': 'affected', 'version': '17.9.1y1'}, {'status': 'affected', 'version': '17.12.1a'}, {'status': 'affected', 'version': '17.9.5'}, {'status': 'affected', 'version': '17.13.1'}, {'status': 'affected', 'version': '17.12.1x'}, {'status': 'affected', 'version': '17.12.2'}, {'status': 'affected', 'version': '17.14.1'}, {'status': 'affected', 'version': '17.9.4a'}, {'status': 'affected', 'version': '17.3.8a'}, {'status': 'affected', 'version': '17.6.6a'}, {'status': 'affected', 'version': '17.6.5a'}, {'status': 'affected', 'version': '17.6.7'}, {'status': 'affected', 'version': '16.12.10a'}, {'status': 'affected', 'version': '17.15.1'}, {'status': 'affected', 'version': '17.13.1a'}, {'status': 'affected', 'version': '17.12.2a'}, {'status': 'affected', 'version': '16.12.11'}, {'status': 'affected', 'version': '17.12.3'}, {'status': 'affected', 'version': '17.12.1y'}, {'status': 'affected', 'version': '17.12.1z'}, {'status': 'affected', 'version': '17.9.5a'}, {'status': 'affected', 'version': '17.14.1a'}, {'status': 'affected', 'version': '17.9.5b'}, {'status': 'affected', 'version': '17.6.8'}, {'status': 'affected', 'version': '16.12.12'}, {'status': 'affected', 'version': '17.12.4'}, {'status': 'affected', 'version': '17.9.6'}, {'status': 'affected', 'version': '17.17.1'}, {'status': 'affected', 'version': '17.16.1'}, {'status': 'affected', 'version': '17.15.1w'}, {'status': 'affected', 'version': '17.12.3a'}, {'status': 'affected', 'version': '17.9.5c'}, {'status': 'affected', 'version': '17.15.1a'}, {'status': 'affected', 'version': '17.12.1z1'}, {'status': 'affected', 'version': '17.15.2'}, {'status': 'affected', 'version': '17.15.1b'}, {'status': 'affected', 'version': '17.9.5d'}, {'status': 'affected', 'version': '17.15.1x'}, {'status': 'affected', 'version': '17.9.6a'}, {'status': 'affected', 'version': '17.12.1z2'}, {'status': 'affected', 'version': '17.6.8a'}, {'status': 'affected', 'version': '17.16.1a'}, {'status': 'affected', 'version': '16.12.13'}, {'status': 'affected', 'version': '17.15.3'}, {'status': 'affected', 'version': '17.9.7'}, {'status': 'affected', 'version': '17.12.5'}, {'status': 'affected', 'version': '17.15.1y'}, {'status': 'affected', 'version': '17.9.5e'}, {'status': 'affected', 'version': '17.12.4a'}, {'status': 'affected', 'version': '17.15.2a'}, {'status': 'affected', 'version': '17.15.2c'}, {'status': 'affected', 'version': '17.15.2b'}, {'status': 'affected', 'version': '17.12.1z3'}, {'status': 'affected', 'version': '17.9.5f'}, {'status': 'affected', 'version': '17.12.4b'}, {'status': 'affected', 'version': '17.12.5a'}, {'status': 'affected', 'version': '17.18.1'}, {'status': 'affected', 'version': '17.12.6'}, {'status': 'affected', 'version': '17.12.1z4'}, {'status': 'affected', 'version': '17.9.8'}, {'status': 'affected', 'version': '17.9.7a'}, {'status': 'affected', 'version': '17.15.3a'}, {'status': 'affected', 'version': '17.15.4'}, {'status': 'affected', 'version': '17.12.5b'}, {'status': 'affected', 'version': '17.15.3b'}, {'status': 'affected', 'version': '16.12.14'}, {'status': 'affected', 'version': '17.18.1z'}, {'status': 'affected', 'version': '17.9.7b'}, {'status': 'affected', 'version': '17.12.5c'}, {'status': 'affected', 'version': '26.1.1'}, {'status': 'affected', 'version': '17.18.1a'}, {'status': 'affected', 'version': '17.15.4a'}, {'status': 'affected', 'version': '17.18.2'}, {'status': 'affected', 'version': '17.18.1w'}, {'status': 'affected', 'version': '17.15.4b'}, {'status': 'affected', 'version': '17.12.6a'}, {'status': 'affected', 'version': '17.12.7'}, {'status': 'affected', 'version': '17.15.4c'}, {'status': 'affected', 'version': '17.9.9'}, {'status': 'affected', 'version': '17.12.5d'}, {'status': 'affected', 'version': '16.12.15'}, {'status': 'affected', 'version': '17.15.4s1'}, {'status': 'affected', 'version': '17.15.5'}, {'status': 'affected', 'version': '17.12.1z5'}, {'status': 'affected', 'version': '17.18.1x'}, {'status': 'affected', 'version': '17.12.1z6'}, {'status': 'affected', 'version': '17.15.4d'}, {'status': 'affected', 'version': '17.12.6b'}, {'status': 'affected', 'version': '17.4.1c'}, {'status': 'affected', 'version': '17.15.5a'}, {'status': 'affected', 'version': '17.18.1y'}, {'status': 'affected', 'version': '17.12.7a'}, {'status': 'affected', 'version': '17.18.3'}, {'status': 'affected', 'version': '17.12.7b'}, {'status': 'affected', 'version': '17.18.3a'}, {'status': 'affected', 'version': '26.1.1a'}, {'status': 'affected', 'version': '17.15.7'}, {'status': 'affected', 'version': '16.12.16'}], 'defaultStatus': 'unknown'}] Added Description As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco IOS XE Software engineering team has conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-20269 are related to issues with improper control of a resource through its lifetime that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-664. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H Added CWE CWE-664 Added Reference https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-iosxe-V8NMuMZJ
EPSS is a daily estimate of the probability of exploitation activity
being observed over the next 30 days. Following chart shows the EPSS
score history of the vulnerability.