CVE-2023-33620Public exploitNetwork attack vector

Traffic decryption via shared HTTPS private key

Published Jun 13, 2023 · Updated Jul 9, 2026

Information disclosure in GL.iNET GL-AR750S-Ext firmware 3.215 allows man-in-the-middle attackers to decrypt HTTPS traffic. The lighttpd certificate at /etc/lighttpd/server.pem and its private key are identical across devices, so obtaining the shared key defeats connection confidentiality. The attacker must intercept traffic between an administrator and the router; exposed data can include authentication tokens.

CVSS severity5.9
Medium
EPSS probability0.53%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in GL.iNET GL-AR750S-Ext firmware 3.215 allows man-in-the-middle attackers to decrypt HTTPS traffic. The lighttpd certificate at /etc/lighttpd/server.pem and its private key are identical across devices, so obtaining the shared key defeats connection confidentiality. The attacker must intercept traffic between an administrator and the router; exposed data can include authentication tokens.

The record

CVE
CVE-2023-33620
Published
Jun 13, 2023
Updated
Jul 9, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-522, T1557
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 13, 2023CVE publishedPublication date reported by the CVE source.
  2. Jul 9, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.9NIST NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
6.8Justin ApplegateCVSS:3.0/AV:N/AC:H/PR:N/UI:R/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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-522Insufficiently Protected Credentials
T1557Adversary-in-the-Middle

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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