How severe is CVE-2016-7069?

CVE-2016-7069 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2016-7069 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (90th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-7069?

CVE-2016-7069 affects Powerdns Dnsdist. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2016-7069?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2016-7069 published?

CVE-2016-7069 was published on 2018-09-11 and last updated on 2026-06-17.

CVE-2016-7069

CVE-2016-7069 is a medium-severity vulnerability in Powerdns Dnsdist with a CVSS 3.x base score of 5.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
CVSS v2: 5.0
EPSS exploit prediction: 5% (90th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Powerdns Dnsdist
Published: 2018-09-11
Last modified: 2026-06-17

Description

An issue has been found in dnsdist before 1.2.0 in the way EDNS0 OPT records are handled when parsing responses from a backend. When dnsdist is configured to add EDNS Client Subnet to a query, the response may contain an EDNS0 OPT record that has to be removed before forwarding the response to the initial client. On a 32-bit system, the pointer arithmetic used when parsing the received response to remove that record might trigger an undefined behavior leading to a crash.

Frequently asked questions

What is CVE-2016-7069?: An issue has been found in dnsdist before 1.2.0 in the way EDNS0 OPT records are handled when parsing responses from a backend. When dnsdist is configured to add EDNS Client Subnet to a query, the response may contain an EDNS0 OPT record that has to be removed before forwarding the response to the initial client. On a 32-bit system, the pointer arithmetic used when parsing the received response to remove that record might trigger an undefined behavior leading to a crash.
How severe is CVE-2016-7069?: CVE-2016-7069 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2016-7069 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (90th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-7069?: CVE-2016-7069 affects Powerdns Dnsdist. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2016-7069?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2016-7069 published?: CVE-2016-7069 was published on 2018-09-11 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:powerdns:dnsdist:*:*:x86:*:*:*:*:*

More vulnerabilities in Powerdns Dnsdist

CVE-2017-7557 — High (CVSS 8.8): dnsdist version 1.1.0 is vulnerable to a flaw in authentication mechanism for REST API potentially allowing CSRF attack.
CVE-2026-33593 — High (CVSS 7.5): A client can trigger a divide by zero error leading to crash by sending a crafted DNSCrypt query.
CVE-2026-33602 — Medium (CVSS 6.5): A rogue backend can send a crafted UDP response with a query ID off by one related to the maximum configured value,…
CVE-2026-24029 — Medium (CVSS 6.5): When the early_acl_drop (earlyACLDrop in Lua) option is disabled (default is enabled) on a DNS over HTTPs frontend…
CVE-2026-27853 — Medium (CVSS 5.9): An attacker might be able to trigger an out-of-bounds write by sending crafted DNS responses to a DNSdist using the…
CVE-2018-14663 — Medium (CVSS 5.9): An issue has been found in PowerDNS DNSDist before 1.3.3 allowing a remote attacker to craft a DNS query with trailing…

All CVEs affecting Powerdns Dnsdist →

Other CWE-20 (Improper Input Validation) vulnerabilities

CVE-2026-48316 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48281 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48277 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48055 — Critical (CVSS 10.0): Streambert is a cross-platform Electron Desktop App to stream and download any video media. In versions 2.4.0 and…
CVE-2026-34910 — Critical (CVSS 10.0): A malicious actor with access to the network could exploit an Improper Input Validation vulnerability found in UniFi OS…
CVE-2026-33587 — Critical (CVSS 10.0): Lack of user input sanitisation in Open Notebook v1.8.3 allows the application user to execute Python code (and…

Browse all CWE-20 (Improper Input Validation) vulnerabilities →