CVE-2026-3963

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.36% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 28.5% of scored records. A rank, not a probability.

NVD base score

2.9 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/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

NVD analysis status

Deferred. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-03-11 23:02Z5 MO AGO

Last updated

2026-03-12 13:35Z5 MO AGO

Reserved

2026-03-11

Assigning CNA

VulDB

Record state

PUBLISHED

Severity

Medium (CVSS 6.3)

CNA CVSS vector

CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P

Weaknesses

• CWE-320
• CWE-321Use of Hard-coded Cryptographic KeyVariant

Data version

5.2

Document digest

9b37495d56f6944db33e3e679fda8c9e1bb98a0e59cb5555a608d12cf8bfb0c4

• vuldb.comVDB-350392 | perfree go-fastdfs-web Apache Shiro RememberMe ShiroConfig.java rememberMeManager hard-coded keyhttps://vuldb.com/?id.350392vdb-entrytechnical-description
• vuldb.comVDB-350392 | CTI Indicators (IOB, IOC, TTP, IOA)https://vuldb.com/?ctiid.350392signaturepermissions-required
• vuldb.comSubmit #768282 | perfree go-fastdfs-web ≤1.3.7 Hardcoded Apache Shiro Cipher Keyhttps://vuldb.com/?submit.768282third-party-advisory
• www.notion.sohttps://www.notion.so/go-fastdfs-web-Hardcoded-Apache-Shiro-Cipher-Key-reach-RCE-313ea92a3c41806fae44dffe53e69751exploit