How severe is CVE-2010-1938?

CVE-2010-1938 has a CVSS 2.0 base score of 9.3, rated critical severity.

Is CVE-2010-1938 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 22% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2010-1938?

CVE-2010-1938 primarily affects Nrl Opie. In total, 44 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2010-1938?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2010-1938 published?

CVE-2010-1938 was published on 2010-05-28 and last updated on 2026-06-16.

CVE-2010-1938

CVE-2010-1938 is a critical-severity vulnerability in Nrl Opie with a CVSS 2.0 base score of 9.3. Its EPSS exploit-prediction score of 22% places it in the 97th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-189.

Key facts

Severity: Critical (CVSS 2.0 base score 9.3)
EPSS exploit prediction: 22% (97th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-189
Affected product: Nrl Opie
Published: 2010-05-28
Last modified: 2026-06-16

Description

Off-by-one error in the __opiereadrec function in readrec.c in libopie in OPIE 2.4.1-test1 and earlier, as used on FreeBSD 6.4 through 8.1-PRERELEASE and other platforms, allows remote attackers to cause a denial of service (daemon crash) or possibly execute arbitrary code via a long username, as demonstrated by a long USER command to the FreeBSD 8.0 ftpd.

Frequently asked questions

What is CVE-2010-1938?: Off-by-one error in the __opiereadrec function in readrec.c in libopie in OPIE 2.4.1-test1 and earlier, as used on FreeBSD 6.4 through 8.1-PRERELEASE and other platforms, allows remote attackers to cause a denial of service (daemon crash) or possibly execute arbitrary code via a long username, as demonstrated by a long USER command to the FreeBSD 8.0 ftpd.
How severe is CVE-2010-1938?: CVE-2010-1938 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2010-1938 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 22% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2010-1938?: CVE-2010-1938 primarily affects Nrl Opie. In total, 44 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2010-1938?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2010-1938 published?: CVE-2010-1938 was published on 2010-05-28 and last updated on 2026-06-16.

References

Affected products (44)

cpe:2.3:o:freebsd:freebsd:6:stable:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:6.4:*:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:6.4:release:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:6.4:release_p2:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:6.4:release_p3:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:6.4:release_p4:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:6.4:release_p5:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:6.4:stable:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:7.0:*:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:7.0:beta_4:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:7.0:current:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:7.0:pre-release:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:7.0:release:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:7.0:release-p12:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:7.0:release-p8:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:7.0:release-p9:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:7.0:releng:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:7.0:stable:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:7.0-release:*:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:7.0_beta4:*:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:7.0_releng:*:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:7.1:*:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:7.1:pre-release:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:7.1:rc1:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:7.1:release-p1:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:7.1:release-p2:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:7.1:release-p4:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:7.1:release-p5:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:7.1:release-p6:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:7.1:stable:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:7.2:*:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:7.2:pre-release:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:7.2:stable:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:8.0:*:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:8.1-prerelease:*:*:*:*:*:*:*
cpe:2.3:a:nrl:opie:*:test1:*:*:*:*:*:*
cpe:2.3:a:nrl:opie:2.2:*:*:*:*:*:*:*
cpe:2.3:a:nrl:opie:2.3:*:*:*:*:*:*:*
cpe:2.3:a:nrl:opie:2.4:*:*:*:*:*:*:*
cpe:2.3:a:nrl:opie:2.10:*:*:*:*:*:*:*

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