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CVE-2021-37726· NVD / CVE Program· CNA hpe

A remote buffer overflow vulnerability was discovered in HPE Aruba Instant (IAP) version(s): Aruba Instant 8.7.x.x: 8.7.0.0 through 8.7.1.2.

A remote buffer overflow vulnerability was discovered in HPE Aruba Instant (IAP) version(s): Aruba Instant 8.7.x.x: 8.7.0.0 through 8.7.1.2. Aruba has released patches for Aruba Instant (IAP) that address this security vulnerability.

CriticalCVSS 9.8 · v3.1—No exploit No fix recorded
Published
Oct 12, 2021
Updated
Jun 17, 2026
EPSS
2.4% · 83th percentile
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Report tools

JSON

Action score

40

Plan

Add it to your regular patch cycle.

CVSS
39 / 40 · 9.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 2.4%

Affected systems

VendorProduct
arubanetworksaruba instant
siemensscalance w1750d firmware
siemensscalance w1750d

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • arubanetworks aruba instant8.7.0.0 and later · before 8.7.1.3
  • siemens scalance w1750d firmwarebefore 8.7.1.3

Versions reported by the vendor

Affected version ranges reported by the assigning authority (hpe). Independent of NVD's CPE analysis and usually ahead of it.

  • n/a HPE Aruba Instant (IAP)

    • Aruba Instant 8.7.x.x: 8.7.0.0 through 8.7.1.2affected

Same product

arubanetworks: all records

Other highest-scoring records for the same primary product.

  • CVE-2018-7084A command injection vulnerability is present that permits an unauthenticated user with access to the Aruba Instant web interface to execute
    40Plan
  • CVE-2018-7083If a process running within Aruba Instant crashes, it may leave behind a "core dump", which contains the memory contents of the process at t
    31Monitor
  • CVE-2021-37732A remote arbitrary command execution vulnerability was discovered in HPE Aruba Instant (IAP) version(s): Aruba Instant 6.4.x.x: 6.4.4.8-4.2.
    29Monitor
  • CVE-2021-37730A remote arbitrary command execution vulnerability was discovered in HPE Aruba Instant (IAP) version(s): Aruba Instant 6.4.x.x: 6.4.4.8-4.2.
    29Monitor
  • CVE-2021-37727A remote arbitrary command execution vulnerability was discovered in HPE Aruba Instant (IAP) version(s): 6.4.x.x: 6.4.4.8-4.2.4.18 and below
    29Monitor
  • CVE-2018-7082A command injection vulnerability is present in Aruba Instant that permits an authenticated administrative user to execute arbitrary command
    29Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-120 · Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvd-primary

Root cause

When data is copied, the source length is not compared with the size of the destination buffer. Excess data overwrites adjacent memory.

The bug in code

The whole CWE-120 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

c
char buf[256];memcpy(buf, pkt->data, pkt->len);

Fixed

c
char buf[256];if (pkt->len > sizeof(buf)) {  return -EINVAL;}memcpy(buf, pkt->data, pkt->len);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

We use this product, ask for help

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records