How severe is CVE-2015-2694?

CVE-2015-2694 has a CVSS 2.0 base score of 5.8, rated medium severity.

Is CVE-2015-2694 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-2694?

CVE-2015-2694 primarily affects Mit Kerberos 5. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2015-2694?

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

When was CVE-2015-2694 published?

CVE-2015-2694 was published on 2015-05-25 and last updated on 2026-06-17.

CVE-2015-2694

CVE-2015-2694 is a medium-severity vulnerability in Mit Kerberos 5 with a CVSS 2.0 base score of 5.8. 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-264.

Key facts

Severity: Medium (CVSS 2.0 base score 5.8)
EPSS exploit prediction: 3% (85th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-264
Affected product: Mit Kerberos 5
Published: 2015-05-25
Last modified: 2026-06-17

Description

The kdcpreauth modules in MIT Kerberos 5 (aka krb5) 1.12.x and 1.13.x before 1.13.2 do not properly track whether a client's request has been validated, which allows remote attackers to bypass an intended preauthentication requirement by providing (1) zero bytes of data or (2) an arbitrary realm name, related to plugins/preauth/otp/main.c and plugins/preauth/pkinit/pkinit_srv.c.

Frequently asked questions

What is CVE-2015-2694?: The kdcpreauth modules in MIT Kerberos 5 (aka krb5) 1.12.x and 1.13.x before 1.13.2 do not properly track whether a client's request has been validated, which allows remote attackers to bypass an intended preauthentication requirement by providing (1) zero bytes of data or (2) an arbitrary realm name, related to plugins/preauth/otp/main.c and plugins/preauth/pkinit/pkinit_srv.c.
How severe is CVE-2015-2694?: CVE-2015-2694 has a CVSS 2.0 base score of 5.8, rated medium severity.
Is CVE-2015-2694 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-2694?: CVE-2015-2694 primarily affects Mit Kerberos 5. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2015-2694?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2015-2694 published?: CVE-2015-2694 was published on 2015-05-25 and last updated on 2026-06-17.

References

Affected products (6)

cpe:2.3:a:mit:kerberos_5:1.12:*:*:*:*:*:*:*
cpe:2.3:a:mit:kerberos_5:1.12.1:*:*:*:*:*:*:*
cpe:2.3:a:mit:kerberos_5:1.12.2:*:*:*:*:*:*:*
cpe:2.3:a:mit:kerberos_5:1.12.3:*:*:*:*:*:*:*
cpe:2.3:a:mit:kerberos_5:1.13:*:*:*:*:*:*:*
cpe:2.3:a:mit:kerberos_5:1.13.1:*:*:*:*:*:*:*

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