- 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
- psirt@cisco.com
- NVD status
- Analyzed
- Products
- ios_xr
CVSS 3.1
- Type
- Secondary
- Base score
- 6
- Impact score
- 5.2
- Exploitability score
- 0.8
- Vector string
- CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
- Severity
- MEDIUM
- psirt@cisco.com
- CWE-347
- Hype score
- Not currently trending
Cisco patches critical IOS XR flaws including CVE-2025-20340 causing DoS via ARP broadcast storms and CVE-2025-20248 enabling image signature bypass. Root access needed to exploit. #IOSXRFix #NetworkSecurity #USA https://t.co/pyQBPMddHL
@TweetThreatNews
12 Sept 2025
28 Impressions
0 Retweets
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Cisco IOS XR Software Image Verification Bypass Vulnerability (CVE-2025-20248) #Cisco #CiscoIOSXR #CVE202520248 #CyberSecurity #ImageVerificationBypassVulnerability https://t.co/Af12lsXGvm https://t.co/8TAwvB65Ct
@SystemTek_UK
12 Sept 2025
48 Impressions
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CVE-2025-20248 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 veri… https://t.co/FIEAs9JOLN
@CVEnew
10 Sept 2025
317 Impressions
0 Retweets
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},
{
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},
{
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},
{
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}
],
"negate": false,
"operator": "OR"
}
]
}
]