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CVE-2025-7209

17
FAUCET Score

CVE-2025-7209 is a problematic null pointer dereference vulnerability affecting 9fans plan9port up to version 9da5b44, specifically within the value_decode function in src/libsec/port/x509.c. This vulnerability has a CVSS score of 5.5 (MEDIUM), requiring local access for exploitation and leading to high availability impact. While the exploit has been publicly disclosed, there is no evidence of active exploitation, Metasploit/Nuclei modules, or significant community discussion, and it is not listed in the KEV catalog. Organizations should apply the patch identified as deae8939583d83fd798fca97665e0e94656c3ee8 to mitigate this risk.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2025-03-29CPE matchmatch criteria
cpe:2.3:a:9fans:plan9port:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 4.0

1.9LOW

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/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
LOCAL
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
VS Confidentiality
NONE
VS Integrity
NONE
VS Availability
LOW
SS Confidentiality
NONE
SS Integrity
NONE
SS Availability
NONE
Exploit Maturity
PROOF_OF_CONCEPT
CvssVersion
4.0

Exploit Intelligence

EPSS Score
0.20%
Probability of exploitation in next 30 days
EPSS Percentile
9.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0020 is in the 48th percentile among its peer group of 15,937 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

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 (1)

github_advisorypatch availablevia nvd_reference
View patch

References

git.9front.org / plan9front/plan9front/deae8939583d83fd798fca97665e0e94656c3ee8/commit.html
Patch
github.com / 9fans/plan9port/issues/711
ExploitIssue TrackingPatchVendor Advisory
github.com / 9fans/plan9port/issues/711
Patch
github.com / user-attachments/files/19698361/plan9port_crash_2.txt
Exploit
vuldb.com
Permissions RequiredVDB Entry
vuldb.com
Third Party AdvisoryVDB Entry
vuldb.com
Third Party AdvisoryVDB Entry