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CVE-1999-1521

38
FAUCET Score

CVE-1999-1521 describes a critical buffer overflow vulnerability in Computalynx CMail 2.3 SP2 and 2.4 SMTP servers. This flaw allows a remote, unauthenticated attacker to execute arbitrary code by sending a specially crafted MAIL FROM command. With a CVSS score of 10.0, this vulnerability poses a severe risk, enabling complete compromise of confidentiality, integrity, and availability. While not currently on the KEV catalog or Hot List, public exploit code exists, indicating a potential for exploitation. Community discussion and media coverage are minimal, which is common for older CVEs.

Impacted Technologies

VendorProductVersion(s)CPE
2.3sp2CPE matchmatch criteria
cpe:2.3:a:computalynx:cmail:2.3sp2:*:*:*:*:*:*:*
2.4CPE matchmatch criteria
cpe:2.3:a:computalynx:cmail:2.4:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

10.0HIGH

AV:N/AC:L/Au:N/C:C/I:C/A:C

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
8.05%
Probability of exploitation in next 30 days
EPSS Percentile
94.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
ExploitDB: EDB-19495 · Sep 13, 1999
This CVE's current EPSS score of 0.0805 is in the 90th percentile among its peer group of 51,551 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

marc.info
marc.info
exchange.xforce.ibmcloud.com / vulnerabilities/2240
securityfocus.com / bid/633
ExploitVendor Advisory