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CVE-2026-25791

25
FAUCET Score

CVE-2026-25791 affects the Bishopfox Sliver command and control framework prior to version 1.7.0. This vulnerability allows an unauthenticated remote actor to trigger a denial-of-service condition by repeatedly creating unvalidated DNS sessions, leading to memory exhaustion. With a CVSS score of 7.5 (HIGH), it has a network attack vector, low attack complexity, and high impact on availability. There is no known active exploitation, public exploit code, or significant community discussion beyond a single security update mention.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.7.0CPE matchmatch criteria
cpe:2.3:a:bishopfox:sliver:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.41%
Probability of exploitation in next 30 days
EPSS Percentile
33.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0041 is in the 12th percentile among its peer group of 51,551 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

Patch Available

Vendor Patches (2)

gopatch availablevia ghsa
Product: github.com/bishopfox/sliverFixed in: 1.6.12
github_advisoryvendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

goGHSA-wxrw-gvg8-fqjphigh

Sliver has DNS C2 OTP Bypass that Allows Unauthenticated Session Flooding and Denial of Service

Feb 6, 2026

References

github.com / BishopFox/sliver/releases/tag/v1.7.0
ProductRelease Notes
github.com / BishopFox/sliver/security/advisories/GHSA-wxrw-gvg8-fqjp
ExploitVendor Advisory