Vulnerability Details : CVE-2021-26690

Apache HTTP Server versions 2.4.0 to 2.4.46 A specially crafted Cookie header handled by mod_session can cause a NULL pointer dereference and crash, leading to a possible Denial Of Service
Vulnerability category: Memory CorruptionDenial of service
Published 2021-06-10 07:15:08
Updated 2021-12-01 21:33:28
Source Apache Software Foundation
View at NVD,   CVE.org

Threat overview for CVE-2021-26690

Top countries where our scanners detected CVE-2021-26690
Top open port discovered on systems with this issue 80
IPs affected by CVE-2021-26690 7,138,042
Threat actors abusing to this issue? Yes
Find out if you* are affected by CVE-2021-26690!
*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-2021-26690

Probability of exploitation activity in the next 30 days: 11.64%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 95 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2021-26690

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Source
5.0
 MEDIUM AV:N/AC:L/Au:N/C:N/I:N/A:P
10.0
2.9
 nvd@nist.gov
7.5
 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.9
3.6
 nvd@nist.gov

CWE ids for CVE-2021-26690

  • A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit.
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2021-26690

Products affected by CVE-2021-26690

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