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CVE-2026-33257

26
FAUCET Score

CVE-2026-33257 is a denial of service vulnerability in an internal web server that permits unlimited memory allocation through specially crafted web requests. The vulnerability affects systems with the internal web server enabled, though this component is disabled by default. The vulnerability carries a CVSS score of 5.3 (MEDIUM) with a network-based attack vector requiring no authentication or user interaction. Attack complexity is low, meaning exploitation is straightforward. The impact is limited to availability, as the attack causes service disruption through resource exhaustion rather than compromising confidentiality or integrity. There is no current evidence of active exploitation. The vulnerability does not appear on the Known Exploited Vulnerabilities catalog, and community attention remains minimal, with an EPSS score of 0.000090000 indicating very low real-world exploit probability. No public exploit code has been reported, and the vulnerability remains inactive on threat intelligence lists.

Impacted Technologies

VendorProductVersion(s)CPE
>= 4.9.0, < 4.9.14CPE matchmatch criteria
cpe:2.3:a:powerdns:authoritative:*:*:*:*:*:*:*:*
>= 5.0.0, < 5.0.4CPE matchmatch criteria
cpe:2.3:a:powerdns:authoritative:*:*:*:*:*:*:*:*
>= 1.9.0, < 1.9.13CPE matchmatch criteria
cpe:2.3:a:powerdns:dnsdist:*:*:*:*:*:*:*:*
>= 2.0.0, < 2.0.4CPE matchmatch criteria
cpe:2.3:a:powerdns:dnsdist:*:*:*:*:*:*:*:*
>= 5.2.0, < 5.2.9CPE matchmatch criteria
cpe:2.3:a:powerdns:recursor:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.3MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.51%
Probability of exploitation in next 30 days
EPSS Percentile
40.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0051 is in the 18th percentile among its peer group of 51,553 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

docs.powerdns.com / authoritative/security-advisories/powerdns-advisory-2026-05.html
Vendor Advisory
docs.powerdns.com / recursor/security-advisories/powerdns-advisory-powerdns-2026-03.html
Broken LinkVendor Advisory
dnsdist.org / security-advisories/powerdns-advisory-for-dnsdist-2026-04.html
Vendor Advisory