Is CVE-2011-1527 in the CISA KEV catalog?

No. CVE-2011-1527 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2011-1527?

CVE-2011-1527 has a CVSS v2 base score of 7.8 (HIGH).

What is the EPSS score for CVE-2011-1527?

CVE-2011-1527 has an EPSS score of 3.65% (88th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2011-1527?

Upgrade krb5 on debian 11 to 1.10+dfsg~alpha1-1 or later.

CVE & CISA-KEV Catalog

CVE-2011-1527

HIGHEPSS 88th pctl

7.8

CVSS v2

NVD

Description

The kdb_ldap plugin in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.9 through 1.9.1, when the LDAP back end is used, allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a kinit operation with incorrect string case for the realm, related to the is_principal_in_realm, krb5_set_error_message, krb5_ldap_get_principal, and process_as_req functions.

CWE-20Improper Input Validation

How to fix

Remediation Available

krb5Debian

Fixed in:1.10+dfsg~alpha1-1CVE-2011-1527

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

3.65%probability of exploitation in 30 days

88thpercentile

Elevated risk: more likely to be exploited than 88% of all known CVEs.

References

Vendor Advisory2

Government Resource1

kb.cert.org

Other references2

Related Vulnerabilities

Other CWE-20 (Improper Input Validation) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-3400	Critical	10.0	100%	KEV + Ransom	-
CVE-2021-45105	Medium	5.9	100%	-	Fix
CVE-2021-44228	Critical	10.0	100%	KEV + Ransom	Fix
CVE-2021-21985	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2018-7600	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2020-3452	High	7.5	100%	KEV	Fix

Embed a live status badge for CVE-2011-1527

Markdown

[![CVE-2011-1527](https://tridentstack.com/cve/badge/CVE-2011-1527.svg)](https://tridentstack.com/cve/CVE-2011-1527)

HTML

<a href="https://tridentstack.com/cve/CVE-2011-1527"><img src="https://tridentstack.com/cve/badge/CVE-2011-1527.svg" alt="CVE-2011-1527"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-29.