CVE-2021-44151Public exploitNetwork attack vector

Unauthenticated session hijacking via brute-forceable cookies

Published Dec 13, 2021 · Updated Aug 4, 2024

Session hijacking in Reprise RLM 14.2 allows remote attackers to read authorized web content through a guessed active-session cookie. The web interface exposes the static cookie name, then accepts attacker-supplied values from a four-hex-character space on Windows. No credentials or user interaction are required, but a legitimate user must have an active session; Linux cookies appear to use eight characters.

CVSS severity7.5
High
EPSS probability2.53%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Session hijacking in Reprise RLM 14.2 allows remote attackers to read authorized web content through a guessed active-session cookie. The web interface exposes the static cookie name, then accepts attacker-supplied values from a four-hex-character space on Windows. No credentials or user interaction are required, but a legitimate user must have an active session; Linux cookies appear to use eight characters.

The record

CVE
CVE-2021-44151
Published
Dec 13, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-330, T1606.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 13, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record 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

5.0NIST NVDAV:N/AC:L/Au:N/C:P/I:N/A:N
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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.

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-330Use of Insufficiently Random Values
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

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Your stack

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