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CVE-2007-4826

13
FAUCET Score

CVE-2007-4826 describes a denial-of-service vulnerability in Quagga's bgpd, affecting versions prior to 0.99.9. Authenticated BGP peers can crash the service by sending a malformed OPEN message or, if debugging is enabled, a malformed COMMUNITY attribute, leading to a NULL pointer dereference. This vulnerability has a CVSS score of 3.5, indicating a medium attack complexity and partial availability impact, requiring authentication for exploitation. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 0.99.8CPE matchmatch criteria
cpe:2.3:a:quagga:quagga:*:*:*:*:*:*:*:*
0.95CPE matchmatch criteria
cpe:2.3:a:quagga:quagga:0.95:*:*:*:*:*:*:*
0.96CPE matchmatch criteria
cpe:2.3:a:quagga:quagga:0.96:*:*:*:*:*:*:*
0.96.1CPE matchmatch criteria
cpe:2.3:a:quagga:quagga:0.96.1:*:*:*:*:*:*:*
0.96.2CPE matchmatch criteria
cpe:2.3:a:quagga:quagga:0.96.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

3.5LOW

AV:N/AC:M/Au:S/C:N/I:N/A:P

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
SINGLE
Exploitability Score
6.8
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.69%
Probability of exploitation in next 30 days
EPSS Percentile
74.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0169 is in the 84th percentile among its peer group of 1,638 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, 0.0 Bluesky, 0.0 Mastodon, and 0.1 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

Patch Available

Vendor Patches (2)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: quagga-0:0.98.3-4.el4_8.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: quagga-0:0.98.6-5.el5_5.2
View patch

Vendor Advisories (1)

redhatCVE-2007-4826Low

quagga bgpd DoS

Sep 7, 2007

References

fedoranews.org / updates/FEDORA-2007-219.shtml
lists.debian.org / debian-security-announce/debian-security-announce-2007/msg00153.html
quagga.net / news2.php
Patch
secunia.com / advisories/26744
PatchVendor Advisory
secunia.com / advisories/26829
Vendor Advisory
secunia.com / advisories/26863
Vendor Advisory
secunia.com / advisories/27049
Vendor Advisory
secunia.com / advisories/29743
Vendor Advisory
exchange.xforce.ibmcloud.com / vulnerabilities/36551
sunsolve.sun.com / search/document.do
debian.org / security/2007/dsa-1382
mandriva.com / security/advisories
quagga.net / download/quagga-0.99.9.changelog.txt
redhat.com / support/errata/RHSA-2010-0785.html
securityfocus.com / bid/25634
Patch
trustix.org / errata/2007/0028
ubuntu.com / usn/usn-512-1
vupen.com / english/advisories/2007/3129
Vendor Advisory
vupen.com / english/advisories/2008/1195/references
Vendor Advisory