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© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2025-27090

20
FAUCET Score

CVE-2025-27090 affects BishopFox Sliver, an open-source adversary emulation framework. The vulnerability lies in the teamserver's reverse port forwarding, which allows implants to establish a reverse tunnel without operator instruction, potentially exposing the server's IP address to third parties. With a CVSS score of 5.3 (Medium), this vulnerability is network-exploitable with low complexity and no user interaction required, though its impact is limited to information disclosure. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 1.5.26, < 1.5.43CPE matchmatch criteria
cpe:2.3:a:bishopfox:sliver:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 4.0

6.9MEDIUM

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
VS Confidentiality
LOW
VS Integrity
NONE
VS Availability
NONE
SS Confidentiality
NONE
SS Integrity
NONE
SS Availability
NONE
Exploit Maturity
NOT_DEFINED
CvssVersion
4.0

Exploit Intelligence

EPSS Score
0.60%
Probability of exploitation in next 30 days
EPSS Percentile
45.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0060 is in the 29th percentile among its peer group of 23,705 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

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

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
gopatch availablevia ghsa
Product: github.com/bishopfox/sliverFixed in: 1.5.43

Vendor Advisories (1)

goGHSA-fh4v-v779-4g2wmedium

SSRF in sliver teamserver

Feb 19, 2025

References

github.com / BishopFox/sliver/commit/0f340a25cf3d496ed870dae7da39eab4427bc16f
Patch
github.com / BishopFox/sliver/commit/10e245326070c6a5884a02e0790bb7e2baefb3a1
Patch
github.com / BishopFox/sliver/security/advisories/GHSA-fh4v-v779-4g2w
ExploitVendor Advisory