CVE-2025-53705

Ashlar-Vellum Cobalt, Xenon, Argon, Lithium, Cobalt Share Out-of-bounds Write

HIGH
7.8
CVSS Score
Published: August 18, 2025 at 09:05 PM UTC
Updated: June 17, 2026 at 09:38 AM UTC
9 products affected across 2 vendorsCobaltXenonLithium

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Severity
HIGH7.8
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

In Ashlar-Vellum Cobalt, Xenon, Argon, Lithium, and Cobalt Share versions prior to 12.6.1204.204, the affected applications lack proper validation of user-supplied data when parsing CO files. This could lead to an out-of-bounds write. An attacker could leverage this vulnerability to execute arbitrary code in the context of the current process.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 12.2.1204.204
v < 12.2.1204.204
v < 12.2.1204.204
v < 12.2.1204.204
v < 12.2.1204.204
v < 12.6.1204.204
Affected range stops below 12.6.1204.204, so it looks safe — our inference, not a vendor statement
v < 12.6.1204.204
Affected range stops below 12.6.1204.204, so it looks safe — our inference, not a vendor statement
v < 12.6.1204.204
Affected range stops below 12.6.1204.204, so it looks safe — our inference, not a vendor statement
v < 12.6.1204.204
Affected range stops below 12.6.1204.204, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.8HIGHicscert
Attack Vector
LOCAL
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-787

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