vciy

CVE-2025-53705

INDEX BUILT · 2026-09-20

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

CVE-2025-537054 of 4 sources documented this
27

rank 27 = 0 + 21 + 0 + 6 + 0

rank@v1 · scheduled

Someone is already using it

CISA KEV catalog · public proof-of-concept · FIRST EPSS

EPSS 0.00164  ·  without this subject the record ranks 27

What it costs you if it fires

NVD CVSS base score, then the CNA's own

CVSS 8.4, from the CNA  ·  without this subject the record ranks 6

It is getting worse, not staying still

FIRST EPSS series, rescorings and bad loads removed

no persisting rise in 365 days  ·  without this subject the record ranks 27

How much of the world it touches

NVD CPE configurations

5 products in the CPE ranges  ·  without this subject the record ranks 21

Someone else already set the date

CISA KEV remediation due date

no CISA due date  ·  without this subject the record ranks 27

Unaudited dollar value2 of 3 inputs carry a receipt
Exposure$8,180over the next 30 days, if this record is yours
Movementno material movementthe record holds only daily drift and scoring model releases
Basisassumeda published average, not your estate

$8,180 = $4.99M incident cost x 1 exposure x 0.00164 likelihood

udv@v1 · unaudited · wrong for you until you say what you run

$4.99M is the cost of a breach that happened, from IBM Cost of a Data Breach Report 2026, global average. It is not the value of any asset of yours. That average already covers breaches of every severity, so scaling it by exposure understates a partial-impact record. That is an assumption, not a measurement. Your own asset value goes in the decision record.

Hindsight · the state

0.00164EPSSNOT IN KEVas of 2026-09-20
Severity8.4 HIGHreceipt
Harmtotal lossreceipt
Exploitationnone in held sources
Defensefix version namedreceipt
Movementdoubled within 72hreceipt
PLATEAU10Minimal movement since 2025-08-19, 334 days at 0.00, as of 2026-07-19. arc-rules@v1

Foresight · where to check next

WatchGuardIvanti ConnectVMware ESXiFortinetMicrosoft Windows53705

This record is one instance of CWE-787, out-of-bounds write. The index holds 14893 prior instances of this class, 164 KEV-listed. The nearest of its KEV-listed records are drawn beside this. taxonomy@v1

Full pattern panel

Prior records in this weakness class. Each is its own record, dated and receipted.
Color is a claim, not decoration:the hostile worldthe defenseno signalspoke length is how much of the record matches, not how bad it is

Running Ashlar-Vellum Cobalt? Check your version

A deterministic range check against the ranges this record publishes. It tells you where a version sits in the record, not whether your deployment is exploitable. No account needed.

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Matches your own product list against every record this index holds, and tells you when one of them moves.

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AcceptDeferPatch by…Not affectedMitigated

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Harm, if it fires from the vector and the weakness

Written for the ticket you're about to file.

Reachneeds local access · no privileges required · active user interaction · low attack complexity · no attack requirementsreceipt
ImpactComplete confidentiality, integrity and availability lossreceipt
Scored fromCVSS v4.0 · the CNA's vectorreceipt
Weakness classCWE-787 Out-of-bounds Writereceipt
Published consequencesCWE-787: Integrity: Modify Memory, Execute Unauthorized Code or Commands; Availability: DoS: Crash, Exit, or Restart; Other: Unexpected State[email protected]

CISA KEV & Federal Remediation Deadline from the record and CISA

The fix, and how long it's been waiting.

Fixed in12.6.1204.204receipt
Patch available sinceNo dated patch-availability record in held sources. The index holds reference URLs without dates and only the current revision of the CVE record, so the day a fix first existed cannot be derived. Only the versions it landed in.

Exploit Status & Known PoCs a ladder, not a score

Current rung: Nothing observed in held sources.

  • RUNG 1Nothing observed in held sources
  • RUNG 2Proof-of-concept published
  • RUNG 3Exploited in the wild · CISA KEV listed
  • RUNG 4Ransomware campaign use known

Authority who says so

CVSS, the CNA8.4 HIGHreceipt
Exploit probability0.00164 · top 94% of all CVEsreceipt
Blast breadth5 products across 1 vendorderived
Assigned byicscertreceipt
Recorded changes16 · last 19 Sep 2026derived

Affected & Fixed Versions as published

Affected productAshlar-Vellum Cobalt; Ashlar-Vellum Xenon; Ashlar-Vellum Argon; Ashlar-Vellum Lithium; Ashlar-Vellum Cobalt Sharereceipt
Published rangesashlar cobalt < 12.2.1204.204; ashlar cobalt share < 12.2.1204.204; ashlar argon < 12.2.1204.204; ashlar lithium < 12.2.1204.204receipt
Show all 5 published ranges
ashlar cobalt < 12.2.1204.204
ashlar cobalt share < 12.2.1204.204
ashlar argon < 12.2.1204.204
ashlar lithium < 12.2.1204.204
ashlar xenon < 12.2.1204.204
Fixed in12.6.1204.204receipt

A rung lights from a row in the index, never from an assessment. "Held sources" is the true scope of the claim: this index reads the CVE record, NVD, CISA KEV, FIRST's EPSS and public proof-of-concept repositories, and it does not observe attacks.

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What it is stated by the CNA

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. receipt

NVD's analysis a second authority

weakness
CWE-787
affected versions
ashlar cobalt < 12.2.1204.204; ashlar cobalt share < 12.2.1204.204; ashlar argon < 12.2.1204.204; and 2 more, listed in full below
also scored by
[email protected] 8.4 CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/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 ·…

check it yourself cisa.gov receipt

Movement the material steps

19 Aug 20250.00015
15 Jun 20260.00158 · scoring model v2026.06.15
19 Jul 20260.00164

This score more than doubled inside 72 hours. Both observations are in the full history below.

Show all 16 observations
19 Aug 20250.00015
24 Aug 20250.0002
19 Sep 20250.00022
25 Oct 20250.00026
29 Nov 20250.00034
18 Dec 20250.00038
8 Jan 20260.00021
15 Jan 20260.00024
26 Jan 20260.00028
14 Mar 20260.00032
23 Apr 20260.00033
4 May 20260.0004
14 May 20260.00044
14 Jun 20260.00067
15 Jun 20260.00158
19 Jul 20260.00164

16 observations held. A highlighted step crossed a promotion threshold. A step marked with a scoring model moved because the instrument was replaced, not because the vulnerability changed. receipt

The full biography

EPSS 0.00164Published2025-08-18Index as of2026-07-19

Exploit probability more than doubled between 2026-06-14 and 2026-06-15 (0.00067 → 0.00158) and the record had been public for 11 months when this index was last written.

Published 2025-08-18 receipt · Index as of 2026-07-19 derived

The pattern, elsewhere

This record is one instance of CWE-787, out-of-bounds write. The index holds 14893 prior instances of this class, 164 KEV-listed. The nearest of its KEV-listed records are drawn beside this. [email protected]

CVE-2025-14733 · WatchGuard Fireware OSmatches 6 of 9KEV listed · 2025receipt
CVE-2025-0282 · Ivanti Connect Secureonly 1 attribute comparableKEV listed · 2025receipt
CVE-2025-22225 · VMware ESXionly 1 attribute comparableKEV listed · 2025receipt
CVE-2025-22457 · Ivanti Connect Secureonly 1 attribute comparableKEV listed · 2025receipt
CVE-2024-21762 · Fortinet FortiProxyonly 1 attribute comparableKEV listed · 2024receipt
CVE-2024-30051 · Microsoft Windows 10 Version 1809only 1 attribute comparableKEV listed · 2024receipt

"Matches n of m" counts the attributes the two records can both be compared on: the CVSS metrics they share a version of, any weakness class beyond this one, and the vendor. fit-rules@v1

14893 records in this class held. The six above are drawn from the ones CISA has listed as exploited, ranked by how much of the record matches this one. That is why every one of them is KEV-listed: the pool is, so the colour on those spokes says nothing the pool has not already said.

No curated product neighbourhood is held for this product, so the records above are the nearest this index can name. The neighbourhood table covers a small set of products and is extended by hand.

Siblings and hubs

Records related to this one

Fixed with these, by one advisory

icsa-25-224-01

Listed because one advisory covers them, not because they are the same defect. Each record's own state is on its own page.

Grouping: held values

Browse the index from here

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What usually comes next

Everything above needs no account. What is below is work: assembling it, scoping it to your estate, watching it, and handing it to someone else.

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