CVE-2002-0702Dhcpd Vulnerability
Format string vulnerabilities in the logging routines for dynamic DNS code (print.c) of ISC DHCP daemon (DHCPD) 3 to 3.0.1rc8, with the NSUPDATE option enabled, allow remote malicious DNS servers to execute arbitrary code via format strings in a DNS server response.
Published Jul 26, 2002 · Updated Apr 15, 2026
Key Facts
Patch immediately- CVE-2002-0702 is a critical-severity vulnerability (CVSS 10.0 v2) affecting Dhcpd (Isc).
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 31% probability of exploitation in the next 30 days.
- No fixed version is listed yet; check the vendor advisory for mitigations.
- Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
Scores
CVSS v2
10.0
AV:N/AC:L/Au:N/C:C/I:C/A:C
EPSS (30-day exploit likelihood)
31%
Higher than 98.2% of all scored CVEs
Exploit maturity
Proof of concept
ATLAS score
37/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Not listed
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Proof of concept
Public exploit code
1
Proof-of-concept links
In-the-wild evidence
0
Reports of active use
Advisories And Exploit References
- patchCA-2002-12
- patchdhcpd-nsupdate-format-string(9039)
- patchMDKSA-2002:037
- patch4701
Description
Format string vulnerabilities in the logging routines for dynamic DNS code (print.c) of ISC DHCP daemon (DHCPD) 3 to 3.0.1rc8, with the NSUPDATE option enabled, allow remote malicious DNS servers to execute arbitrary code via format strings in a DNS server response.
Affected Products
9 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| DhcpdIsc | 3.0, 3.0.1-rc1, 3.0.1-rc2, 3.0.1-rc3, 3.0.1-rc4, 3.0.1-rc5, 3.0.1-rc6, 3.0.1-rc7 | n/a |
Timeline
Publicly disclosed
Jul 26, 2002
Last updated
Apr 15, 2026
References
- patchCA-2002-12
- patchdhcpd-nsupdate-format-string(9039)
- patchMDKSA-2002:037
- patch4701
- exploitExploitDB-21440
FAQ
Common Questions.
Format string vulnerabilities in the logging routines for dynamic DNS code (print.c) of ISC DHCP daemon (DHCPD) 3 to 3.0.1rc8, with the NSUPDATE option enabled, allow remote malicious DNS servers to execute arbitrary code via format strings in a DNS server response.
Affected: Dhcpd (Isc) versions 3.0, 3.0.1-rc1, 3.0.1-rc2, 3.0.1-rc3, 3.0.1-rc4, 3.0.1-rc5, 3.0.1-rc6, 3.0.1-rc7. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
Is CVE-2002-0702 On Your Attack Surface?
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