CVE-2025-59023 | Crafted delegations or IP fragments can poison cached delegations in Recursor

Crafted delegations or IP fragments can poison cached delegations in Recursor.

Published: 2026-02-09 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-59023 is rated Low Risk (39.4/100): CVSS High severity, with low exploitation likelihood (EPSS 0.27%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2025-59023

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.01% 0.27% +0.26%
2 2026-02-10 — 0.01% —

Full EPSS history (2 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-59023

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.2 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 3.9 4.2 [email protected]

Weakness enumeration for CVE-2025-59023

GitHub Security Advisory for CVE-2025-59023

GHSA-jgvp-6mmr-4mrw · Severity: high — Crafted delegations or IP fragments can poison cached delegations in Recursor.

OS Trackers for CVE-2025-59023

vendor priority summary link
alpine — CVE-2025-59023: 1 source package rows (pdns-recursor); 3 state rows across 2 repos (3.22-community, edge-community); fixed 3, open 0. https://security.alpinelinux.org/vuln/CVE-2025-59023
debian end-of-life CVE-2025-59023 end-of-life priority: Debian including 1 source packages (pdns-recursor), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 3, open 2. https://security-tracker.debian.org/tracker/CVE-2025-59023
ubuntu medium CVE-2025-59023 medium priority: Ubuntu including 1 source packages (pdns-recursor), 8 status rows across 8 suites (bionic, focal, jammy, noble, plucky, questing, upstream, xenial): needs-triage 7, ignored 1. https://ubuntu.com/security/CVE-2025-59023

Affected software / configurations for CVE-2025-59023

Vendor Product Version Raw CPE
powerdns recursor >= 5.1.0, < 5.1.8 cpe:2.3:a:powerdns:recursor:*:*:*:*:*:*:*:*
powerdns recursor >= 5.2.0, < 5.2.6 cpe:2.3:a:powerdns:recursor:*:*:*:*:*:*:*:*
powerdns recursor >= 5.3.0, < 5.3.1 cpe:2.3:a:powerdns:recursor:*:*:*:*:*:*:*:*

References for CVE-2025-59023

cvelogic Threat Intelligence