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01 Record

CVE-2026-121617

Linksys E5600 Header upload_fw.cgi init_multipart out-of-bounds write

HighPUBLISHEDCNA: VulDB
CNA base score8.7 CVSS v4.0CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P
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02 Description

Linksys E5600 Header upload_fw.cgi init_multipart out-of-bounds write

03 Exploitation and scoring

Exploitation
Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision
Not assessed by CISA
EPSS probability
Not scored by EPSS
EPSS percentile
Not scored by EPSS
NVD base score
7.7 (CVSS v4.0), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/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 2026-11-04.
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.

04 Metadata

Published
2026-11-04 02:45Z2 HR AGO
Last updated
2026-11-04 02:45Z2 HR AGO
Reserved
2026-11-03
Assigning CNA
VulDB
Record state
PUBLISHED
Severity
High (CVSS 8.7)
CNA CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P
Weaknesses
  • CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferClass
  • CWE-787Out-of-bounds WriteBase
Data version
5.2
Document digest
b529efa57256e0a25cb1ca18c1362647e236a66f35219b1c1751d270b2cccbf9

05 Affected products

VendorProductVersionsPlatforms
LinksysE56001.1.0.26—

06 References