Signal is active with 1 mentions in latest observed window
Recommended action window: Monitor and triage in normal cycle
NVD description
A vulnerability in the CLI of Cisco IOS XR Software could allow an authenticated, local attacker to execute arbitrary commands as root on the underlying operating system of an affected device. This vulnerability is due to insufficient validation of user arguments that are passed to specific CLI commands. An attacker with a low-privileged account could exploit this vulnerability by using crafted commands at the prompt. A successful exploit could allow the attacker to elevate privileges to root and execute arbitrary commands on the underlying operating system.
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
AVAILABLE
Momentum
STABLE
If you run products in this scope, you should treat this CVE as relevant to your environment.
| Date | Total | Labels |
|---|
| 2026-03-11 | 4 | Disclosure3Patch1 |
| 2026-03-12 | 4 | General1Patch3 |
| 2026-03-13 | 3 | Disclosure1General1Patch1 |
| 2026-03-18 | 1 | General1 |
| 2026-03-19 | 1 | Disclosure1 |
⚠️ Vulnerabilidades en productos Cisco ❗ CVE-2026-20074 ❗ CVE-2026-20046 ❗ CVE-2026-20040 ➡️ Más info: https://www.cert.gov.py/vulnerabilidades-en-productos-cisco-11/ https://t.co/dWJ8IQdthG
Post summary
A brief announcement listing three Cisco CVE identifiers with links for further details.
Warning: #Cisco patched 4 vulnerabilities in it's IOS XR software. The two most critical flaws (#CVE-2026-20040, #CVE-2026-20046 ; CVSSv3.1 8.8 ) could allow an authenticated local attacker to execute arbitrary commands as root. #Patch #Patch #Patch
Post summary
Cisco has issued patches for four IOS XR vulnerabilities, including CVE‑2026‑20040 and CVE‑2026‑20046, which could allow authenticated local attackers to run arbitrary commands as root.
Cisco patches critical privilege escalation flaws (CVE-2026-20040, CVE-2026-20046) in IOS XR software that allow local attackers to gain full root access. #Cisco #CVE #CyberSecurity #NetworkSecurity #PatchAlert #InfoSec https://securityonline.info/root-access-via-cli-cisco-patches-critical-ios-xr-privilege-escalation-flaws/ https://t.co/GexEiGGl59
Post summary
The tweet announces that Cisco has released patches for two critical privilege‑escalation vulnerabilities (CVE‑2026‑20040 and CVE‑2026‑20046) in IOS XR that allow local attackers to gain full root access.
Cisco IOS XR の脆弱性 CVE-2026-20040／20046 が FIX：root でのコマンド実行と管理者権限の取得 https://iototsecnews.jp/2026/03/12/cisco-ios-xr-software-vulnerability-allow-attacker-to-execute-commands-as-root/ 大規模ネットワーク向け OS である Cisco IOS XR Software において、root権限の奪取や管理者制御の回避を許す2件の深刻な脆弱性が発見されました。これらの問題の原因は、CLI コマンド実行時におけるユーザー入力値の検証不備と、コマンドと権限グループの紐付けミスという設計上の欠陥にあります。 特に警戒すべき CVE-2026-20040 は、特定の CLI コマンドに不正な引数を注入することで、OS の最高権限である root としての任意のコマンド実行に至るものです。 もう一方のCVE-2026-20046は、仮想ルーターであるIOS XRv 9000 に特有の問題であり、タスクグループの定義ミスを突く低権限ユーザーに、管理用コマンドの認可チェックの回避を許すものです。ご利用のチームは、ご注意ください。 #Cisco #CVE202620040 #CVE202620046 #IOSXR #Vulnerability
Post summary
The article announces two critical Cisco IOS XR vulnerabilities that enable root command execution and privilege escalation, detailing how the flaws arise but providing no PoC, exploit code, or evidence of active exploitation.
🩹シスコ、IOS XRソフトウェアにおける深刻度Highの脆弱性4件にパッチ（CVE-2026-20040、CVE-2026-20046他） ⚠️Veeam、VBRにおけるCriticalなRCE脆弱性などについて警告（CVE-2026-21666、CVE-2026-21667他） 〜サイバーアラート3月13日〜 https://codebook.machinarecord.com/threatreport/silobreaker-cyber-alert/44562/
Post summary
The post announces Cisco IOS XR patches for four high‑severity CVEs and warns about critical RCE vulnerabilities in Veeam VBR, providing CVE IDs and severity but no exploitation details.
Cisco IOS XR Software CLI Privilege Escalation Vulnerability CVE: CVE-2026-20040 Vendor: Cisco Product: Cisco IOS XR Software CVSS: 8.8 Credits: n/a Description: A vulnerability in the CLI of Cisco IOS XR Software could allow an authenticated, local attacker to execute arbitrary commands as root on the underlying operating system of an affected device. This vulnerability is due to insufficient validation of user arguments that are passed to specific CLI commands. An attacker with a low-privileged account could exploit this vulnerability by using crafted commands at the prompt. A successful exploit could allow the attacker to elevate privileges to root and execute arbitrary commands on the underlying operating system. References: • https://dbugs.ptsecurity.com/vulnerability/CVE-2026-20040 • https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-privesc-bF8D5U4W #dbugs_vuln
Post summary
The advisory discloses a privilege‑escalation flaw in Cisco IOS XR CLI (CVE‑2026‑20040) that can let local authenticated users gain root access. No PoC, exploit, or patch information is provided.
🚨*CVE* CVE-2026-20040 A vulnerability in the CLI of Cisco IOS XR Software could allow an authenticated, local attacker to execute arbitrary commands as root on the underlying operating sys… https://www.cve.org/CVERecord?id=CVE-2026-20040 ----- Traducción: CVE-2026-20040 Una… http://infoflow.cloud`
Post summary
The text only reports the CVE number and a brief description of its impact, without details on PoC, exploitation, or remediation.
CVE-2026-20040 A vulnerability in the CLI of Cisco IOS XR Software could allow an authenticated, local attacker to execute arbitrary commands as root on the underlying operating sys… https://www.cve.org/CVERecord?id=CVE-2026-20040
Post summary
The passage announces CVE-2026-20040 as a local authenticated CLI vulnerability in Cisco IOS XR that permits root-level command execution, but it offers no PoC, exploit, or mitigation details.
The most severe of these issues are CVE-2026-20040 and CVE-2026-20046 (CVSS score of 8.8), two bugs that could be exploited to execute arbitrary commands as root or gain administrative control of a device. https://www.securityweek.com/cisco-patches-high-severity-ios-xr-vulnerabilities-2/
Post summary
Cisco has released patches for two high‑severity CVEs that allow arbitrary command execution or administrative takeover, as indicated by the referenced article.
CVE Alert: CVE-2026-20040 - Cisco - Cisco IOS XR Software - https://www.redpacketsecurity.com/cve-alert-cve-2026-20040-cisco-cisco-ios-xr-software/ #OSINT #ThreatIntel #CyberSecurity #cve-2026-20040 #cisco #cisco-ios-xr-software
Post summary
The tweet shares a link to a CVE alert for Cisco IOS XR software but provides no additional technical details, PoC, exploit, or active exploitation information.
There is a new vulnerability with elevated criticality in Cisco IOS XR (CVE-2026-20040) https://vuldb.com/?id.350471
Post summary
Announcement of a new elevated‑critical vulnerability (CVE-2026-20040) affecting Cisco IOS XR, with no additional details or mitigation information provided.
🟠 CVE-2026-20040 - High A vulnerability in the CLI of Cisco IOS XR Software could allow an authenticated, local attacker to execute arbitrary commands as root on the underlying operating system of an affected device... https://www.thehackerwire.com/vulnerability/CVE-2026-20040/ https://t.co/StSCUDVOzH
Post summary
The text announces a high‑severity vulnerability (CVE‑2026‑20040) in Cisco IOS XR CLI that allows an authenticated local attacker to execute commands as root, but provides no further technical detail or evidence of exploitation.
[CVE-2026-20040: HIGH] Cisco IOS XR Software vulnerability allows local attackers to run arbitrary commands as root due to insufficient validation of user arguments.Upgrade to patched version ASAP.#cve,CVE-2026-20040,#cybersecurity https://cvefind.com/CVE-2026-20040
Post summary
The tweet warns of a high‑severity CVE-2026-20040 in Cisco IOS XR that permits local root command execution and urges users to upgrade to the patched version.
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| Part | Vendor | Product | Version | Target SW | Target HW |
|---|---|---|---|---|---|
| OS | cisco | ios_xr | - | - | - |