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CVE-2026-41954iControl REST and tmsh vulnerability

Description

Sensitive information disclosure vulnerability exists in the undisclosed iControl REST endpoint and TMOS Shell (tmsh) command which may allow an authenticated attacker with resource administrator role privileges to view sensitive information.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Timeline

  1. ID reserved

    By f5

  2. · 13 days later

    Published

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2026-41954, by who scored it
Scored byCVSSScoreVector
f5CNA (assigner)4.0Medium6.9CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
f5CNA (assigner)3.1Medium4.9CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
NVDNVD · Analyzed4.0Medium6.9CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/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
EPSS (exploitation in 30 days)
0.29% · top 78% of all CVEs (12 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.9.

Affected products

  • F5 · BIG-IP

    • unaffected 21.1.0 – < *
    • affected 21.0.0 – < 21.0.0.1
    • affected 17.5.0 – < 17.5.1.4
    • affected 17.1.0 – < 17.1.3.1
    • affected 16.1.0 – < *

  • F5 · BIG-IQ

    • affected 8.4.0 – < 8.4.1

References

References1

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .