vciy

CVE-2021-27101

INDEX BUILT · 2026-09-20

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Accellion FTA 9_12_370 and earlier is affected by SQL injection via a crafted Host header in a request to document_root.html

CVE-2021-271013 of 4 sources documented this
73

rank 73 = 40 + 25 + 0 + 2 + 6

rank@v1 · act now

Someone is already using it

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

EPSS 0.05998 · CISA KEV listed  ·  without this subject the record ranks 33

What it costs you if it fires

NVD CVSS base score, then the CNA's own

CVSS 9.8, from NVD  ·  without this subject the record ranks 48

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 73

How much of the world it touches

NVD CPE configurations

1 product in the CPE ranges  ·  without this subject the record ranks 71

Someone else already set the date

CISA KEV remediation due date

CISA remediation date held  ·  without this subject the record ranks 67

Unaudited dollar value2 of 3 inputs carry a receipt
Exposure$299,000over 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

$299,000 = $4.99M incident cost x 1 exposure x 0.05998 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

0.05998EPSSKEV · LISTED
Severity9.8 CRITICALreceipt
Harmtotal loss · unauthenticated · ransomware-linkedreceipt
Exploitationransomware use knownreceipt
Defenseno fix version held
Movementrisenreceipt
PLATEAU10Minimal movement since 2021-04-14, 1972 days at 0.06, as of 2026-09-07. arc-rules@v1

Foresight · where to check next

No weakness class or product neighbourhood is held for this record, so this index cannot name anywhere to check next. That is an absence in the record, not a finding about the software.

Color is a claim, not decoration:the hostile worldthe defenseno signal

Check a version against this record

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Harm, if it fires from the vector and the weakness

Written for the ticket you're about to file.

Reachnetwork-reachable · no privileges required · no user interaction · low attack complexityreceipt
ImpactComplete confidentiality, integrity and availability lossreceipt
Scored fromCVSS v3.1 · NVD's vectorreceipt
Weakness classNo CWE mapping in held sources.
Ransomware campaign useKnown (CISA)receipt

CISA KEV & Federal Remediation Deadline from the record and CISA

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

Fixed inNo fix version in held sources, as the index stood on 7 Sep 2026.
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.
CISA remediation statusoverdue since 2021-11-17receipt
CISA required actionApply updates per vendor instructions.receipt
Published to CISA KEV260 daysderived

Exploit Status & Known PoCs a ladder, not a score

Current rung: Ransomware campaign use known, 2021-11-03.

  • RUNG 1Nothing observed in held sources
  • RUNG 2Proof-of-concept published · 1 public repository2026-09-07receipt
  • RUNG 3Exploited in the wild · CISA KEV listed2021-11-03receipt
  • RUNG 4Ransomware campaign use known2021-11-03receipt

Authority who says so

CVSS, NVD9.8 CRITICALreceipt
Exploit probability0.05998 · top 7% of all CVEsreceipt
Blast breadth1 product across 1 vendorderived
Assigned bymitrereceipt
Recorded changes48 · last 19 Sep 2026derived

Affected & Fixed Versions as published

Named in the CPE rangesAccellion ftareceipt
Published rangesaccellion fta <= 9_12_370receipt

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

Accellion FTA 9_12_370 and earlier is affected by SQL injection via a crafted Host header in a request to document_root.html. The fixed version is FTA_9_12_380 and later. receipt

NVD's analysis a second authority

severity
9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
affected versions
accellion fta <= 9_12_370
also scored by
9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

check it yourself accellion.com github.com receipt

Dated events

2021-11-03Added to CISA KEV2021-11-17CISA remediation due2022-02-04EPSS moved 0.03 to 0.092022-04-01EPSS moved 0.09 to 0.012026-06-15EPSS moved 0.01 to 0.06

Movement the material steps

14 Apr 20210.00624
7 Mar 20230.00785 · scoring model v2023.03.01
17 Mar 20250.01639 · scoring model v2025.03.14
15 Jun 20260.05998 · scoring model v2026.06.15
7 Sep 20260.05998
Show all 34 observations
14 Apr 20210.00624
6 Jan 20220.02742
4 Feb 20220.09029
1 Apr 20220.00885
7 Mar 20230.00785
1 Aug 20230.00731
23 Sep 20230.00722
7 Oct 20230.00559
13 Dec 20230.00761
6 Dec 20240.00992
17 Dec 20240.01391
9 Feb 20250.01960
17 Mar 20250.01639
20 Mar 20250.02023
29 Mar 20250.05931
30 Mar 20250.02023
17 Apr 20250.01639
26 Apr 20250.01452
20 Jul 20250.01793
11 Aug 20250.01452
8 Oct 20250.01073
22 Oct 20250.01489
31 Oct 20250.01582
4 Nov 20250.01047
18 Nov 20250.06008
21 Nov 20250.01047
26 Jan 20260.00984
18 Feb 20260.00813
23 Mar 20260.00865
6 Apr 20260.00813
7 Jun 20260.00748
15 Jun 20260.05998
31 Jul 20260.05949
7 Sep 20260.05998

34 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 0.05998Published2021-02-16CISA KEV2021-11-03Public PoC2026-09-07Index as of2026-09-07

Listed by CISA 260 days after it published and the record had been public for 5 years, 6 months when this index was last written.

Published 2021-02-16 receipt · CISA KEV 2021-11-03 receipt · Public PoC 2026-09-07 receipt · Index as of 2026-09-07 derived

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