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CVE-1999-1091

19
FAUCET Score

CVE-1999-1091 describes a vulnerability in the UNIX news readers tin and rtin, where the /tmp/.tin_log file is created with insecure permissions and follows symlinks. This flaw allows an attacker to modify the permissions of files writable by the user through a symlink attack. The vulnerability has a CVSS score of 5.0 (Medium), indicating a network-based attack with low complexity, resulting in partial integrity impact. There is no evidence of active exploitation, nor are there known public exploits in Metasploit, Nuclei, or ExploitDB. Despite its age, the CVE has garnered significant community discussion, with 10 mentions, primarily on GitHub.

Impacted Technologies

VendorProductVersion(s)CPE
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:a:rtin:rtin:*:*:*:*:*:*:*:*
1.2CPE matchmatch criteria
cpe:2.3:a:tin:tin:1.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

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

Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.28%
Probability of exploitation in next 30 days
EPSS Percentile
67.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0128 is in the 47th percentile among its peer group of 23,701 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 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
marc.info
exchange.xforce.ibmcloud.com / vulnerabilities/431