CVE-2023-27823Public exploitNetwork attack vector

Unauthenticated console access via forged atop cookie

Published May 12, 2023 · Updated Jul 9, 2026

Authentication bypass in Optoma 1080PSTX firmware C02 allows remote attackers to access the administration console without credentials. The web interface treats an attacker-supplied atop cookie value of 1 as proof of authentication and serves index.asp without checking credentials. Network reachability to the projector's HTTP interface is sufficient, granting unauthorized access to its application control panel.

CVSS severity9.8
Critical
EPSS probability53.59%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Authentication bypass in Optoma 1080PSTX firmware C02 allows remote attackers to access the administration console without credentials. The web interface treats an attacker-supplied atop cookie value of 1 as proof of authentication and serves index.asp without checking credentials. Network reachability to the projector's HTTP interface is sufficient, granting unauthorized access to its application control panel.

The record

CVE
CVE-2023-27823
Published
May 12, 2023
Updated
Jul 9, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-295, CWE-287, T1606.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 12, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

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

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

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

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-295Improper Certificate Validation
CWE-287Improper Authentication
T1606.001Forge Web Credentials: Web Cookies

Public exploit references

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

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo