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CVE-2015-5621

50
FAUCET Score

CVE-2015-5621 is a denial-of-service vulnerability affecting Net-SNMP versions 5.7.2 and earlier, stemming from improper handling of varBind variables during SNMP PDU parsing. With a CVSS score of 7.5 (High), this vulnerability can be exploited remotely with low attack complexity, potentially leading to a system crash and possibly arbitrary code execution. While there is no evidence of active exploitation in the wild, a proof-of-concept denial-of-service exploit exists on ExploitDB, though community discussion and media coverage remain minimal.

Impacted Technologies

VendorProductVersion(s)CPE
<= 5.7.2CPE matchmatch criteria
cpe:2.3:a:net-snmp:net-snmp:*:*:*:*:*:*:*:*

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
40.00%
Probability of exploitation in next 30 days
EPSS Percentile
98.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
ExploitDB: EDB-45547 · Oct 8, 2018
This CVE's current EPSS score of 0.4000 is in the 97th percentile among its peer group of 51,466 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

The average CVE in this peer group has 0.1 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 6Fixed in: net-snmp-1:5.5-54.el6_7.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: net-snmp-1:5.7.2-20.ael7b_1.1
View patch

Vendor Advisories (1)

redhatCVE-2015-5621Moderate

net-snmp: snmp_pdu_parse() incompletely parsed varBinds left in list of variables

Apr 13, 2015

References

lists.opensuse.org / opensuse-updates/2015-09/msg00004.html
rhn.redhat.com / errata/RHSA-2015-1636.html
bugzilla.redhat.com / show_bug.cgi
cert-portal.siemens.com / productcert/pdf/ssa-978220.pdf
sourceforge.net / p/net-snmp/code/ci/f23bcd3ac6ddee5d0a48f9703007ccc738914791
sourceforge.net / p/net-snmp/bugs/2615
support.citrix.com / article/CTX209443
debian.org / security/2018/dsa-4154
exploit-db.com / exploits/45547
openwall.com / lists/oss-security/2015/04/13/1
Exploit
openwall.com / lists/oss-security/2015/04/16/15
openwall.com / lists/oss-security/2015/07/31/1
securityfocus.com / bid/76380
securitytracker.com / id/1033304
ubuntu.com / usn/USN-2711-1