CVE-2026-90556

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpacttotalSuccessful exploitation gives total 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

0.20% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 9.9% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

Deferred. NVD last modified this record on 2026-09-23.

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

2026-09-12 18:06Z1 MO AGO

Last updated

2026-09-18 17:23Z1 MO AGO

Reserved

2026-09-12

Assigning CNA

VulnCheck

Record state

PUBLISHED

Severity

High (CVSS 8.5)

CNA CVSS vector

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

Weaknesses

• CWE-122Heap-based Buffer OverflowVariant

Data version

5.2

Document digest

aea2fc7fac7bf309276b7bdfed9b04c52ee22d03d4f99f2e21858022fae44d16

• github.comPatch Commithttps://github.com/freeciv/freeciv/commit/75ecde3e86ddf2fe775768450e9a290a4f4d4387patch
• github.comhttps://github.com/freeciv/freecivproduct
• redmine.freeciv.orghttps://redmine.freeciv.org/issues/2161issue-tracking
• github.comhttps://github.com/freeciv/freeciv/blob/R3_2_5/server/savegame/savegame3.c#L964technical-description
• github.comfreeciv R3_2_6 Release Noteshttps://github.com/freeciv/freeciv/releases/tag/R3_2_6release-notes
• github.comhttps://github.com/freeciv/freeciv/blob/R3_2_5/server/savegame/savegame2.c#L788technical-description
• www.vulncheck.comVulnCheck Advisory: Freeciv before 3.2.6 Heap Buffer Overflow via worklist_loadhttps://www.vulncheck.com/advisories/freeciv-before-3.2.6-heap-buffer-overflow-via-worklist-loadthird-party-advisory