MEDIUM
CVE-2012-5521
CWE-617Published: November 25, 2019· Updated: Jun 16, 2026
6.5
CVSS v3.1
Official Description
quagga (ospf6d) 0.99.21 has a DoS flaw in the way the ospf6d daemon performs routes removal
Technical Analysis
CVE-2012-5521 requires adjacent network access, limiting remote exploitation but still posing risk in shared or local network environments.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in availability disruption (denial of service), with a CVSS base score of 6.5.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorAdjacent
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Vendors & Products
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (14)
→
http://www.openwall.com/lists/oss-security/2012/11/13/14Mailing List · Third Party Advisory
→
http://www.securityfocus.com/bid/56530Third Party Advisory · VDB Entry
→
https://access.redhat.com/security/cve/cve-2012-5521Third Party Advisory
→
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2012-5521Issue Tracking · Third Party Advisory
→
https://bugzilla.suse.com/show_bug.cgi?id=CVE-2012-5521Issue Tracking · Third Party Advisory
→
https://exchange.xforce.ibmcloud.com/vulnerabilities/80096Third Party Advisory · VDB Entry
→
https://security-tracker.debian.org/tracker/CVE-2012-5521Third Party Advisory
→
http://www.openwall.com/lists/oss-security/2012/11/13/14Mailing List · Third Party Advisory
→
http://www.securityfocus.com/bid/56530Third Party Advisory · VDB Entry
→
https://access.redhat.com/security/cve/cve-2012-5521Third Party Advisory
→
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2012-5521Issue Tracking · Third Party Advisory
→
https://bugzilla.suse.com/show_bug.cgi?id=CVE-2012-5521Issue Tracking · Third Party Advisory
→
https://exchange.xforce.ibmcloud.com/vulnerabilities/80096Third Party Advisory · VDB Entry
→
https://security-tracker.debian.org/tracker/CVE-2012-5521Third Party Advisory
Quick Facts
CVE IDCVE-2012-5521
CVSS Score6.5 / 10
SeverityMEDIUM
WeaknessCWE-617
CISA KEVNo
Affected3 vendor(s)
PublishedNov 25, 2019
Related CVEs (CWE-617)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2012-5521 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.