CVE-2026-80443Network attack vector

API key exposure via disabled TLS verification

Published Oct 2, 2026 · Updated Oct 2, 2026

Improper TLS certificate validation in HAVELSAN Sef before 2.1 allows man-in-the-middle attackers to intercept external API requests. The APIToolRunner.ExecuteWithContext function hardcodes InsecureSkipVerify to true, so its HTTPS client accepts certificates without checking their trust chain or hostname. Exploitation requires control of the network path between Sef and a configured external API; intercepted traffic can expose API keys and user data.

CVSS severity7.4
High
EPSS probability0.16%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper TLS certificate validation in HAVELSAN Sef before 2.1 allows man-in-the-middle attackers to intercept external API requests. The APIToolRunner.ExecuteWithContext function hardcodes InsecureSkipVerify to true, so its HTTPS client accepts certificates without checking their trust chain or hostname. Exploitation requires control of the network path between Sef and a configured external API; intercepted traffic can expose API keys and user data.

The record

CVE
CVE-2026-80443
Published
Oct 2, 2026
Updated
Oct 2, 2026
Vendor
HAVELSAN
Product
Sef
Classifications
CWE-295, CAPEC-94, T1557
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 2, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <2.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

HAVELSAN · Sefversion=0 <2.1

Published CVSS scores

7.4TR-CERTCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-295Improper Certificate Validation
CAPEC-94Adversary in the Middle (AiTM)
T1557Adversary-in-the-Middle

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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