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CVE-2018-4063· NVD / CVE Program· CNA talos

An exploitable remote code execution vulnerability exists in the upload.cgi functionality of Sierra Wireless AirLink ES450 FW 4.9.3.

An exploitable remote code execution vulnerability exists in the upload.cgi functionality of Sierra Wireless AirLink ES450 FW 4.9.3. A specially crafted HTTP request can upload a file, resulting in executable code being uploaded, and routable, to the webserver. An attacker can make an authenticated HTTP request to trigger this vulnerability.

HighCVSS 8.8 · v3.1KEVWeaponized No fix recorded
Published
May 6, 2019
Updated
Jun 16, 2026
EPSS
27.1% · 98th percentile
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Action score

73

This week

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CVSS
35 / 40 · 8.8 / 10
CISA KEV
30 / 30 · Listed
EPSS
8 / 30 · 27.1%

CISA SSVC decision

Exploitation
active
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

Actively exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on Dec 12, 2025. That signals real attacks, not theory.

Remediation deadline for government agencies: Jan 2, 2026.

Affected systems

VendorProduct
sierrawirelessaleos
sierrawirelessairlink es440
sierrawirelessairlink gx400
sierrawirelessairlink gx440
sierrawirelessairlink ls300
sierrawirelessairlink lx40
sierrawirelessairlink lx60
sierrawirelessairlink mp70
sierrawirelessairlink mp70e
sierrawirelessairlink rv50
sierrawirelessairlink rv50x
sierrawirelessairlink es450

and 1 more

Affected versions

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

  • sierrawireless aleosbefore 4.4.9
  • sierrawireless aleosbefore 4.11.0
  • sierrawireless aleosbefore 4.9.4

Versions reported by the vendor

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

  • n/a Sierra Wireless

    • Sierra Wireless AirLink ES450 FW 4.9.3affected

Same product

sierrawireless: all records

Other highest-scoring records for the same primary product.

  • CVE-2015-2897Sierra Wireless ALEOS before 4.4.2 on AirLink ES, GX, and LS devices has hardcoded root accounts, which makes it easier for remote attackers
    41Plan
  • CVE-2020-8782ALEOS LAN-Side RPC Service Remote Code Execution
    40Plan
  • CVE-2018-10251A vulnerability in Sierra Wireless AirLink GX400, GX440, ES440, and LS300 routers with firmware before 4.4.7 and GX450, ES450, RV50, RV50X,
    40Plan
  • CVE-2019-11851The ACENet service in Sierra Wireless ALEOS before 4.4.9, 4.5.x through 4.9.x before 4.9.5, and 4.10.x through 4.13.x before 4.14.0 allows r
    39Monitor
  • CVE-2019-11855ALEOS LAN-Side RPC Server
    39Monitor
  • CVE-2022-46649Acemanager in ALEOS before version 4.16 allows a user with valid credentials to manipulate the IP logging operation to execute arbitrary she
    36Monitor

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

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

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.

  1. Published
  2. CISA KEV+2411 d
  3. TodaySep 29, 2026+2703 d
EPSS, last 120 days-1% in 7 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.
  • A low-privileged account is enough.
  • 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
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-434 · Unrestricted Upload of File with Dangerous Type

CVSS vector

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

nvd-primary

Attack context

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

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.

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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