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CVE-2024-43394

INDEX BUILT · 2026-09-20

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Apache HTTP Server: SSRF on Windows due to UNC paths

CVE-2024-433944 of 4 sources documented this
2

rank 2 = 0 + 0 + 0 + 2 + 0

rank@v1 · backlog

Someone is already using it

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

EPSS 0.01134  ·  without this subject the record ranks 2

What it costs you if it fires

NVD CVSS base score, then the CNA's own

no CVSS held by anyone  ·  without this subject the record ranks 2

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 2

How much of the world it touches

NVD CPE configurations

1 product in the CPE ranges  ·  without this subject the record ranks 0

Someone else already set the date

CISA KEV remediation due date

no CISA due date  ·  without this subject the record ranks 2

Hindsight · the state

0.01134EPSSNOT IN KEVas of 2026-09-20
Severitynot scored
Harmnot stated
Exploitationnone in held sources
Defenseunaffected versions publishedreceipt
Movementrisenreceipt
PLATEAU10Minimal movement since 2025-07-11, 403 days at 0.01, as of 2026-08-18. arc-rules@v1

Foresight · where to check next

SonicWall SMA1000ConfiguratorIvanti ICSMicrosoftVMware vRealizeVMware vCenter43394

This record is one instance of CWE-918, server-side request forgery (ssrf). The index holds 3592 prior instances of this class, 24 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 signal

Running Apache HTTP Server? 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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Harm, if it fires from the vector and the weakness

Written for the ticket you're about to file.

ReachNo CVSS vector in held sources, so no reach or impact can be stated.
Weakness classCWE-918 Server-Side Request Forgery (SSRF)receipt
Published consequencesCWE-918: Confidentiality: Read Application Data; Integrity: Execute Unauthorized Code or Commands; Access Control: Bypass Protection Mechanism[email protected]

CISA KEV & Federal Remediation Deadline from the record and CISA

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

First unaffected version, by branchhttp server 2.4.64receipt
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

Exploit probability0.01134 · top 35% of all CVEsreceipt
Blast breadth1 product across 1 vendorderived
Assigned byapachereceipt
Recorded changes27 · last 19 Sep 2026derived

Affected & Fixed Versions as published

Affected productApache Software Foundation Apache HTTP Serverreceipt
Published rangesapache http server >= 2.4.0 < 2.4.64receipt

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

Server-Side Request Forgery (SSRF) in Apache HTTP Server on Windows allows to potentially leak NTLM hashes to a malicious server via  mod_rewrite or apache expressions that pass unvalidated request input. This issue affects Apache HTTP Server: from 2.4.0 through 2.4.63. Note:  The Apache HTTP Server Project will be setting a higher bar for accepting vulnerability reports regarding SSRF via UNC paths. The server offers limited protection against administrators directing the server to open UNC paths. Windows servers should limit the hosts they will connect over via SMB based on the nature of NTLM authentication. receipt

NVD's analysis a second authority

weakness
CWE-918
affected versions
apache http server >= 2.4.0 < 2.4.64
also scored by
7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

check it yourself httpd.apache.org receipt

Movement the material steps

11 Jul 20250.00029
15 Jun 20260.01098 · scoring model v2026.06.15
18 Aug 20260.01134
Show all 27 observations
11 Jul 20250.00029
16 Jul 20250.0006
30 Jul 20250.00084
11 Aug 20250.00094
13 Aug 20250.00111
3 Sep 20250.00092
16 Sep 20250.00097
1 Oct 20250.00123
27 Oct 20250.00097
28 Oct 20250.00123
4 Nov 20250.00105
5 Nov 20250.00184
9 Nov 20250.00215
18 Nov 20250.00296
21 Nov 20250.00215
6 Dec 20250.00118
7 Dec 20250.00114
18 Dec 20250.00122
27 Dec 20250.0011
28 Dec 20250.00122
10 Jan 20260.0005
5 Apr 20260.00051
6 May 20260.00145
23 May 20260.00242
15 Jun 20260.01098
23 Jun 20260.01094
18 Aug 20260.01134

27 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 0.01134Published2025-07-10Index as of2026-08-18

The record had been public for 1 year, 1 month when this index was last written.

Published 2025-07-10 receipt · Index as of 2026-08-18 derived

The pattern, elsewhere

This record is one instance of CWE-918, server-side request forgery (ssrf). The index holds 3592 prior instances of this class, 24 KEV-listed. The nearest of its KEV-listed records are drawn beside this. [email protected]

CVE-2026-15409 · SonicWall SMA1000only 1 attribute comparableKEV listed · 2026receipt
CVE-2025-61884 · Oracle Configuratoronly 1 attribute comparableKEV listed · 2025receipt
CVE-2024-21893 · Ivanti ICSonly 1 attribute comparableKEV listed · 2024receipt
CVE-2022-41040 · Microsoft Exchange Server 2013 Cumulative…only 1 attribute comparableKEV listed · 2022receipt
CVE-2021-21975 · VMware vRealize Operationsonly 1 attribute comparableKEV listed · 2021receipt
CVE-2021-21985 · VMware vCenter Server and VMware Cloud…only 1 attribute comparableKEV listed · 2021receipt

"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

3592 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

Its defect family

apache software foundation apache http server

Of the 6 records in this family, this is the only one whose title names due paths.

Grouped by shared product and weakness, not by shared vulnerability. Each record's own state is on its own page.

Family membership: held values

This record is one of a group, and the group's page describes all of them. This page is kept and dated, and the defect family's own page is the one we offer for indexing: the whole group.

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What usually comes next

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