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CVE-2025-20177— Cisco IOS XR Software Image Verification Bypass Vulnerability

Quick assessment

Affected
Cisco Cisco IOS XR Software
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Cisco IOS XR是美国思科（Cisco）公司的一套为其网络设备开发的操作系统。 Cisco IOS XR存在安全漏洞，该漏洞源于启动验证过程中文件验证不完整，可能导致本地攻击者绕过图像签名验证。

CVSS 6.7 · Medium EPSS 0.17% · P6
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I. Basic Information for CVE-2025-20177

Vulnerability Information
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Vulnerability Title
Cisco IOS XR Software Image Verification Bypass Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the boot process of Cisco IOS XR Software could allow an authenticated, local attacker to bypass Cisco IOS XR image signature verification and load unverified software on an affected device. To exploit this vulnerability, the attacker must have root-system privileges on the affected device. This vulnerability is due to incomplete validation of files in the boot verification process. An attacker could exploit this vulnerability by manipulating the system configuration options to bypass some of the integrity checks that are performed during the boot process. A successful exploit could allow the attacker to control the boot configuration, which could enable them to bypass the requirement to run Cisco-signed images or alter the security properties of the running system. Note: Because exploitation of this vulnerability could result in the attacker bypassing Cisco image verification, Cisco has raised the Security Impact Rating (SIR) of this advisory from Medium to High.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
不充分特权处理不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco IOS XR 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco IOS XR是美国思科（Cisco）公司的一套为其网络设备开发的操作系统。 Cisco IOS XR存在安全漏洞，该漏洞源于启动验证过程中文件验证不完整，可能导致本地攻击者绕过图像签名验证。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Cisco Cisco IOS XR Software 7.0.1 -

II. Public POCs for CVE-2025-20177

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III. Intelligence Information for CVE-2025-20177

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Vendor Advisories for CVE-2025-20177 (1)

Same Patch Batch · Cisco · 2025-03-12 · 10 CVEs total

CVE-2025-20138 8.8 HIGH Cisco IOS XR Software CLI Privilege Escalation Vulnerability
CVE-2025-20146 8.6 HIGH Cisco IOS XR Software for ASR 9000 Series Routers Layer 3 Multicast Routing Denial of Serv
CVE-2025-20142 8.6 HIGH Cisco IOS XR Software for ASR 9000 Series Routers L2VPN Denial of Service Vulnerability
CVE-2025-20115 8.6 HIGH Cisco IOS XR Software Border Gateway Protocol Denial of Service Vulnerability
CVE-2025-20209 7.5 HIGH Cisco IOS XR Software Internet Key Exchange Version 2 Denial of Service Vulnerability
CVE-2025-20141 7.4 HIGH Cisco IOS XR Software Release 7.9.2 Denial of Service Vulnerabillity
CVE-2025-20143 6.7 MEDIUM Cisco IOS XR Software Secure Boot Bypass Vulnerability
CVE-2025-20145 5.8 MEDIUM Cisco IOS XR Software Access Control List Bypass Vulnerability
CVE-2025-20144 4.0 MEDIUM Cisco IOS XR Software Access Control List Bypass Vulnerability

IV. Related Vulnerabilities

Same product: Cisco IOS XR Software
Same vendor: Cisco
Same weakness: CWE-274

V. Comments for CVE-2025-20177

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