CVE-2013-7049: Stack-based buffer overflow in fish.cpp in the Fish plugin for ZNC, as used in ZNC for Windows (znc-msvc) 0.20

Q: How do I fix CVE-2013-7049?

znc-msvc: upgrade to newer than 0.206. Exact commands for each OS are on this page.

Q: Is CVE-2013-7049 being exploited?

CVE-2013-7049 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2013-7049 affect?

CVE-2013-7049 affects znc-msvc. Severity is medium (CVSS 4.3). Stack-based buffer overflow in fish.cpp in the Fish plugin for ZNC, as used in ZNC for Windows (znc-msvc) 0.206 and earlier, allows remote attackers to cause a denial of service (crash) via a long string in a DH1080_INIT message.

Q: How urgent is CVE-2013-7049?

Priority 34/100. No elevated risk signals yet.

Routine

MEDIUM 4.3UPGRADE

CVE-2013-7049 is a medium-severity flaw (CVSS 4.3) affecting znc-msvc. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Stack-based buffer overflow in fish.cpp in the Fish plugin for ZNC, as used in ZNC for Windows (znc-msvc) 0.206 and earlier, allows remote attackers to cause a denial of service (crash) via a long string in a DH1080_INIT message.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	4.3 (Medium)
EPSS exploit chance	1.7% (top 23%)
CISA exploited list	No
Weakness	CWE-119
Published	2013-12-23
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: znc

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2013-12-23 23:55 UTCPublished CVE record published
2026-06-17 00:01 UTCUpdated Record last modified

znc znc-msvc UPGRADE

Affected: <= 0.206 · 0.076 · 0.077 · 0.078 · 0.079 · 0.080 · 0.089 · 0.090

Fixed in: newer than 0.206

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy znc-msvc || rpm -q znc-msvc || znc-msvc --version

2. UPGRADE to newer than 0.206 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade znc-msvc

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade znc-msvc

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2013-7049?

znc-msvc: upgrade to newer than 0.206. Exact commands for each OS are on this page.

Is CVE-2013-7049 being exploited?

CVE-2013-7049 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2013-7049 affect?

CVE-2013-7049 affects znc-msvc. Severity is medium (CVSS 4.3). Stack-based buffer overflow in fish.cpp in the Fish plugin for ZNC, as used in ZNC for Windows (znc-msvc) 0.206 and earlier, allows remote attackers to cause a denial of service (crash) via a long string in a DH1080_INIT message.

How urgent is CVE-2013-7049?

Priority 34/100. No elevated risk signals yet.

Software pages

Windows vulnerabilities

Related CVEs

CVE-2012-0033 MEDIUM 5.0 DOWNGRADE The CBounceDCCMod::OnPrivCTCP function in bouncedcc.cpp in the bouncedcc module in ZNC 0.200 and 0.202 allows

References

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