How severe is CVE-2025-20248?

CVE-2025-20248 has a CVSS 3.x base score of 6.0, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2025-20248 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-20248?

CVE-2025-20248 primarily affects Cisco Ios Xr. In total, 90 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-20248?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-20248 have an EU (EUVD) identifier?

Yes. CVE-2025-20248 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-27575.

When was CVE-2025-20248 published?

CVE-2025-20248 was published on 2025-09-10 and last updated on 2026-09-26.

CVE-2025-20248

CVE-2025-20248 is a medium-severity vulnerability in Cisco Ios Xr with a CVSS 3.x base score of 6.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-347.

Key facts

Severity: Medium (CVSS 3.x base score 6.0)
EPSS exploit prediction: 0% (1st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-27575
Weakness: CWE-347
Affected product: Cisco Ios Xr
Published: 2025-09-10
Last modified: 2026-09-26

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.

Frequently asked questions

What is 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 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.
How severe is CVE-2025-20248?: CVE-2025-20248 has a CVSS 3.x base score of 6.0, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2025-20248 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-20248?: CVE-2025-20248 primarily affects Cisco Ios Xr. In total, 90 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-20248?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-20248 have an EU (EUVD) identifier?: Yes. CVE-2025-20248 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-27575.
When was CVE-2025-20248 published?: CVE-2025-20248 was published on 2025-09-10 and last updated on 2026-09-26.

References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-xrsig-UY4zRUCG

Affected products (90)

cpe:2.3:o:cisco:ios_xr:6.5.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:6.5.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:6.5.3:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:6.5.15:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:6.5.25:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:6.5.26:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:6.5.28:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:6.5.29:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:6.5.31:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:6.5.32:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:6.5.33:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:6.5.35:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:6.5.90:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:6.5.92:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:6.5.93:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:6.5.351:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:6.5.352:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:6.6.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:6.6.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:6.6.3:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:6.6.4:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:6.6.11:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:6.6.12:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:6.6.25:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:6.7.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:6.7.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:6.7.3:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:6.7.35:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:6.8.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:6.8.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:6.9.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:6.9.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.0.0:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.0.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.0.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.0.90:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.1.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.1.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.1.3:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.1.15:*:*:*:*:*:*:*

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