LOW
CVE-2006-1721
CWE-20Published: April 11, 2006· Updated: Jun 16, 2026
2.6
CVSS v3.1
Official Description
digestmd5.c in the CMU Cyrus Simple Authentication and Security Layer (SASL) library 2.1.18, and possibly other versions before 2.1.21, allows remote unauthenticated attackers to cause a denial of service (segmentation fault) via malformed inputs in DIGEST-MD5 negotiation.
Technical Analysis
CVE-2006-1721 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityHigh
Privileges Req.
User Interaction
Scope
Impact
ConfidentialityNone
IntegrityNone
AvailabilityP
AV:N/AC:H/Au:N/C:N/I:N/A:P
Affected Vendors & Products
cyrus1 product(s)
sasl
Source: NVD CPE · 5 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
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GitHub PoC Search
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Rapid7 / Metasploit
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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 (68)
→
http://secunia.com/advisories/19618Patch · Vendor Advisory
→
http://secunia.com/advisories/19753Vendor Advisory
→
http://secunia.com/advisories/19809Vendor Advisory
→
http://secunia.com/advisories/19825Vendor Advisory
→
http://secunia.com/advisories/19964Vendor Advisory
→
http://secunia.com/advisories/20014Vendor Advisory
→
http://secunia.com/advisories/22187Vendor Advisory
→
http://secunia.com/advisories/26708Vendor Advisory
→
http://secunia.com/advisories/26857Vendor Advisory
→
http://secunia.com/advisories/27237Vendor Advisory
Quick Facts
CVE IDCVE-2006-1721
CVSS Score2.6 / 10
SeverityLOW
WeaknessCWE-20
CISA KEVNo
Affected1 vendor(s)
PublishedApr 11, 2006
Related CVEs (CWE-20)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2006-1721 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.COM. CVE data is provided under the NVD usage policy.