7.5

CVE-2025-30192: A Recursor configured to send out ECS enabled queries can be sensitive to spoofing attempts

Deferred
AliasesUBUNTU-CVE-2025-30192DEBIAN-CVE-2025-30192openSUSE-SU-2025:15478-1
Published 21-07-2025Last modified 21-07-2025

Vulnerability summary

CVE-2025-30192 is a high (CVSS 7.5) vulnerability in pdns-recursor. EPSS estimates a 0.27% chance of exploitation in the next 30 days, higher than 19.6% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 7.5 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 0% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.27%
0%100%
Low · +0.03 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Timeline

  1. 21-07-2025
    PublishedVulnerability first disclosed.
  2. 21-07-2025
    Last modifiedVulnerability information updated.

Description

An attacker spoofing answers to ECS enabled requests sent out by the Recursor has a chance of success higher than non-ECS enabled queries. The updated version include various mitigations against spoofing attempts of ECS enabled queries by chaining ECS enabled requests and enforcing stricter validation of the received answers. The most strict mitigation done when the new setting outgoing.edns_subnet_harden (old style name edns-subnet-harden) is enabled.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.27%

Chance of exploitation in the next 30 days

Percentile

20%

Versus all other CVEs

30-day change

Increase +0.03 pp

From 0.24% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Alpine1 product
  • pdns-recursor< 5.2.2-r0 | < 5.2.5-r0
Debian1 product
  • pdns-recursorAll versions (No fix recorded) | < 5.2.4-2
Opensuse1 product
  • pdns-recursor&distro=openSUSE Tumbleweed< 5.2.5-1.1
Ubuntu1 product
  • pdns-recursorAll versions (No fix recorded)

4 vendors · 4 products

References

6 links