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CVE-2011-1922

19
FAUCET Score

CVE-2011-1922 describes a denial-of-service vulnerability in Unbound 1.x before version 1.4.10. When debugging and the interface-automatic option are enabled, a remote attacker can send a specially crafted DNS request to trigger an assertion failure, causing the daemon to exit. This vulnerability has a CVSS score of 4.3, indicating a medium attack complexity and partial availability impact, with no confidentiality or integrity impact. There is no evidence of active exploitation, nor are there any public exploits available in Metasploit, Nuclei, or ExploitDB, and it has received minimal community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
1.0.0CPE matchmatch criteria
cpe:2.3:a:nlnetlabs:unbound:1.0.0:*:*:*:*:*:*:*
1.0.1CPE matchmatch criteria
cpe:2.3:a:nlnetlabs:unbound:1.0.1:*:*:*:*:*:*:*
1.0.2CPE matchmatch criteria
cpe:2.3:a:nlnetlabs:unbound:1.0.2:*:*:*:*:*:*:*
1.1.0CPE matchmatch criteria
cpe:2.3:a:nlnetlabs:unbound:1.1.0:*:*:*:*:*:*:*
1.1.1CPE matchmatch criteria
cpe:2.3:a:nlnetlabs:unbound:1.1.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.3MEDIUM

AV:N/AC:M/Au:N/C:N/I:N/A:P

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
7.08%
Probability of exploitation in next 30 days
EPSS Percentile
93.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0708 is in the 93rd percentile among its peer group of 19,956 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

lists.fedoraproject.org / pipermail/package-announce/2011-June/061243.html
osvdb.org / 72750
secunia.com / advisories/44865
exchange.xforce.ibmcloud.com / vulnerabilities/67645
unbound.nlnetlabs.nl / downloads/CVE-2011-1922.txt
PatchVendor Advisory
kb.cert.org / vuls/id/531342
PatchUS Government Resource
securityfocus.com / bid/47986