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CVE-2010-0634

21
FAUCET Score

CVE-2010-0634 describes an unspecified vulnerability in Fast Lexical Analyzer Generator (flex) versions prior to 2.5.35. This vulnerability carries a CVSS score of 7.5, indicating a high severity with potential for partial compromise of confidentiality, integrity, and availability via a network-based attack with low complexity and no authentication required. Despite its severity, there is no known active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.5.34CPE matchmatch criteria
cpe:2.3:a:will_estes:flex:*:*:*:*:*:*:*:*
2.5.4aCPE matchmatch criteria
cpe:2.3:a:will_estes:flex:2.5.4a:*:*:*:*:*:*:*
2.5.27CPE matchmatch criteria
cpe:2.3:a:will_estes:flex:2.5.27:*:*:*:*:*:*:*
2.5.31CPE matchmatch criteria
cpe:2.3:a:will_estes:flex:2.5.31:*:*:*:*:*:*:*
2.5.33CPE matchmatch criteria
cpe:2.3:a:will_estes:flex:2.5.33:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.5HIGH

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

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.05%
Probability of exploitation in next 30 days
EPSS Percentile
60.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0105 is in the 38th percentile among its peer group of 51,485 CVEs.

Social Chatter

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

Vendor Advisories (1)

redhatCVE-2010-0634Low

flex: Security fixes in v2.5.35

Jan 29, 2010

References

freshmeat.net / projects/flex/releases/311661
Patch
osvdb.org / 62029