Is there a public exploit for CVE-2025-61661?

No public exploit for CVE-2025-61661 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2025-61661?

CVE-2025-61661 scores CVSS 4.8 (v3.1), rated medium. EPSS puts the chance of exploitation in the next 30 days at 0.21%.

What does CVE-2025-61661 affect?

CVE-2025-61661 affects GNU grub2.

4.8 Medium

A vulnerability has been identified in the GRUB (Grand Unified Bootloader) component.

CVE-2025-61661

A vulnerability has been identified in the GRUB (Grand Unified Bootloader) component. This flaw occurs because the bootloader mishandles string conversion when reading information from a USB device, allowing an attacker to exploit inconsistent length values. A local attacker can connect a maliciously configured USB device during the boot sequence to trigger this issue. A successful exploitation may lead GRUB to crash, leading to a Denial of Service. Data corruption may be also possible, although given the complexity of the exploit the impact is most likely limited.

Assessment

CVSS: 4.8 (v3.1)
Severity: Medium
EPSS: 0.21% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 18 November 2025
Last updated: 5 November 2026
Affected: GNU · grub2
Assigner: redhat

CVSS vectorCVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H

At the source

EUVD (ENISA)

References

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