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CVE-2025-20248— 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存在数据伪造问题漏洞，该漏洞源于安装过程中文件验证不完整，可能导致加载未签名软件。

CVSS 6.0 · Medium EPSS 0.10% · P1
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I. Basic Information for CVE-2025-20248

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 installation process of Cisco IOS XR Software could allow an authenticated, local attacker to bypass Cisco IOS XR Software image signature verification and load unsigned 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 during the installation of an .iso file. An attacker could exploit this vulnerability by modifying contents of the .iso image and then installing and activating it on the device. A successful exploit could allow the attacker to load an unsigned file as part of the image activation process.
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:N
Source: CVE Program / CVE List V5
Vulnerability Type
密码学签名的验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco IOS XR 数据伪造问题漏洞
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存在数据伪造问题漏洞，该漏洞源于安装过程中文件验证不完整，可能导致加载未签名软件。
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 6.5.3 -

II. Public POCs for CVE-2025-20248

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III. Intelligence Information for CVE-2025-20248

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Same Patch Batch · Cisco · 2025-09-10 · 3 CVEs total

CVE-2025-20340 7.4 HIGH Cisco IOS XR Address Resolution Protocol Broadcast Storm Vulnerability
CVE-2025-20159 5.3 MEDIUM Cisco IOS XR Software Management Interface ACL Bypass Vulnerability

IV. Related Vulnerabilities

Same product: Cisco IOS XR Software
Same vendor: Cisco
Same weakness: CWE-347

V. Comments for CVE-2025-20248

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