Is CVE-2013-4851 being actively exploited?

CVE-2013-4851 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2013-4851?

CVE-2013-4851 has a CVSS 2.0 base score of 6.4 (MEDIUM).

CVE-2013-4851

MEDIUM · CVSS 6.4EPSS 2.1%EU EUVD

The vfs_hang_addrlist function in sys/kern/vfs_export.c in the NFS server implementation in the kernel in FreeBSD 8.3 and 9.x through 9.1-RELEASE-p5 controls authorization for host/subnet export entries on the basis of group information sent by the client, which allows remote attackers to bypass file permissions on NFS filesystems via crafted requests.

Key facts

CVSS score: 6.4 (v2.0)
Severity: MEDIUM
CVSS vector: AV:N/AC:L/Au:N/C:P/I:P/A:N
Weakness (CWE): CWE-264
EPSS score: 2.1% (82th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2013-4696)
Published: July 29, 2013
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2013-4696 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.

View on the EU Vulnerability Database

Affected products

freebsd / freebsd
freebsd / freebsd
freebsd / freebsd
freebsd / freebsd
freebsd / freebsd

References

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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