How severe is CVE-2023-49259?

CVE-2023-49259 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2023-49259 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-49259?

CVE-2023-49259 affects Hongdian H8951-4g-esp Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-49259?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2023-49259 have an EU (EUVD) identifier?

Yes. CVE-2023-49259 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-53261.

When was CVE-2023-49259 published?

CVE-2023-49259 was published on 2024-01-12 and last updated on 2026-06-17.

CVE-2023-49259

CVE-2023-49259 is a high-severity vulnerability in Hongdian H8951-4g-esp Firmware with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-327.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (22nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-53261
Weakness: CWE-327
Affected product: Hongdian H8951-4g-esp Firmware
Published: 2024-01-12
Last modified: 2026-06-17

Description

The authentication cookies are generated using an algorithm based on the username, hardcoded secret and the up-time, and can be guessed in a reasonable time.

Frequently asked questions

What is CVE-2023-49259?: The authentication cookies are generated using an algorithm based on the username, hardcoded secret and the up-time, and can be guessed in a reasonable time.
How severe is CVE-2023-49259?: CVE-2023-49259 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2023-49259 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-49259?: CVE-2023-49259 affects Hongdian H8951-4g-esp Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-49259?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2023-49259 have an EU (EUVD) identifier?: Yes. CVE-2023-49259 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-53261.
When was CVE-2023-49259 published?: CVE-2023-49259 was published on 2024-01-12 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:hongdian:h8951-4g-esp_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Hongdian H8951-4g-esp Firmware

CVE-2023-49262 — Critical (CVSS 9.8): The authentication mechanism can be bypassed by overflowing the value of the Cookie "authentication" field, provided…
CVE-2023-49255 — Critical (CVSS 9.8): The router console is accessible without authentication at "data" field, and while a user needs to be logged in in…
CVE-2023-49253 — Critical (CVSS 9.8): Root user password is hardcoded into the device and cannot be changed in the user interface.
CVE-2023-49257 — High (CVSS 8.8): An authenticated user is able to upload an arbitrary CGI-compatible file using the certificate upload utility and…
CVE-2023-49254 — High (CVSS 8.8): Authenticated user can execute arbitrary commands in the context of the root user by providing payload in the…
CVE-2023-49261 — High (CVSS 7.5): The "tokenKey" value used in user authorization is visible in the HTML source of the login page.

All CVEs affecting Hongdian H8951-4g-esp Firmware →

Other CWE-327 (Use of a Broken or Risky Cryptographic Algorithm) vulnerabilities

CVE-2026-50086 — Critical (CVSS 10.0): The Aqara IAM/SSO gateway (gw-builder.aqara.com) exposes bidirectional AES round-trups against the platform's signing…
CVE-2026-21718 — Critical (CVSS 10.0): An authentication bypass vulnerability exists in Copeland XWEB Pro version 1.12.1 and prior, enabling any attackers to…
CVE-2025-54426 — Critical (CVSS 9.9): Polkadot Frontier is an Ethereum and EVM compatibility layer for Polkadot and Substrate. In versions prior to commit…
CVE-2024-51478 — Critical (CVSS 9.9): YesWiki is a wiki system written in PHP. Prior to 4.4.5, the use of a weak cryptographic algorithm and a hard-coded…
CVE-2026-28252 — Critical (CVSS 9.8): A Use of a Broken or Risky Cryptographic Algorithm vulnerability in Trane Tracer SC, Tracer SC+, and Tracer Concierge…
CVE-2025-13476 — Critical (CVSS 9.8): Rakuten Viber Cloak mode in Android v25.7.2.0g and Windows v25.6.0.0–v25.8.1.0 uses a static and predictable TLS…

Browse all CWE-327 (Use of a Broken or Risky Cryptographic Algorithm) vulnerabilities →